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12-03-88/T\SWR19
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » CEEFAX disks » telesoftware5.adl |
| Filename: | 12-03-88/T\SWR19 |
| Read OK: | ✔ |
| File size: | 284D bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
Duplicates
There is 1 duplicate copy of this file in the archive:
- CEEFAX disks » telesoftware10.adl » 11-11-88/T\SWR19
- CEEFAX disks » telesoftware5.adl » 12-03-88/T\SWR19
File contents
Mastering Sideways ROM & RAM - Module 19 - Autoboot RFS
-------------------------------------------------------
Most of the filing systems on the BBC microcomputer can be selected
(booted in micro-speak) by holding down CTRL with a filing system boot
key and then pressing and releasing the Break key. The DFS can be
booted with Ctrl+D+Break, the ADFS with Ctrl+F+Break, the Tape Filing
system with Ctrl+Space+Break and the Network Filing system with
Ctrl+N+Break. You might expect the RFS to boot with Ctrl+R+Break but
if you try it you will be disappointed, it does not work. The RFS is
the only filing system that can not be booted in this way. In this
module I will show you how to modify the RFS interpreter used in
Module 18 to include booting the RFS with Ctrl+R+Break.
The BBC B issues service call 3 on both hard and soft reset. The
Master issues it only on hard reset. This service call is issued
primarily to allow filing systems to be initialised on break rather
than having to be reselected every time with an operating system
command. Any service rom can intercept this call to execute any
routine but it should only trapped if a key exclusive to that rom is
pressed. The example program BOOTRFS will intercept service call 3 and
use Osbyte &7A to read the internal key number of any key pressed and,
if the internal key number for "R" is found, it will select and
catalogue the RFS.
Osbyte &7A has no entry parameters and returns the internal key
number in the X register. The internal key numbers are not printed in
the BBC B User Guide but the INKEY numbers are listed in the BASIC
keyword section. The INKEY number can be converted into an Internal
Key Number by Exclusive ORing it with &FF. For example, the INKEY
number for R is -52. To find the internal key number type:
>PRINT ~ -52 EOR &FF
FFFFFF33
>
and the answer, ignoring the leading Fs, is &33.
Figure 19.1 shows the coding that needs to be added to a SWR
interpreter to intercept service call 3 and auto-boot the RFS on
Ctrl+R+Break. The auto-boot coding can be included in any SWR
interpreter, it does not have to be in a rom with RFS files. Figure
19.1 illustrates that if, after intercepting service call 3, Osbyte
&7A returns with X=&33 then Ctrl+R+Break has been pressed and your
program can use Osbyte &8D to select the RFS. The routine returns
control to the MOS after balancing the stack and reseting the
accumulator to zero.
.trythree
CMP #3 \ is it autoboot?
BNE out \ branch if not autoboot
PHA \ store A
TXA
PHA \ store X
TYA
PHA \ store Y
LDA #&7A \ Osbyte &7A, no parameters
JSR &FFF4 \ read internal key number
CPX #&33 \ has Ctrl+R+Break been pressed?
BEQ rbreak \ branch if it has
PLA \ pull Y
TAY \ restore Y
PLA \ pull X
TAX \ restore X
PLA \ restore A
RTS \ return to MOS
.rbreak
LDA #&8D \ Osbyte &8D, no parameters
JSR &FFF4 \ *ROM
PLA \ discard Y
PLA \ discard X
PLA \ discard A
LDA #0 \ service recognised
.out
RTS \ return to MOS
Figure 19.1 RFS Auto-boot SWR interpreter.
----------- ------------------------------
The auto-boot routine in figure 19.1 has been adapted for use in the
auto-boot RFS header program BOOTRFS. This program must used with the
RFSGEN program (introduced in Module 18) to create RFS rom images. It
can only be used with RFSGEN and should replace the RFSHEAD program to
create an auto-booting RFS rom image. If RFS rom images are used in
more than one rom socket then a rom image created with BOOTRFS should
only be used in one of the rom sockets. All the other rom images
should be created with RFSHEAD to keep their rom headers as small as
possible.
BOOTRFS intercepts service call 3, selects and catalogues the RFS
and exits with the RFS active. It uses the service call &0D and &0E
interpreter introduced in Module 18.
Service call 3 is intercepted (line 660) and if Ctrl+R+Break is
detected (lines 720-750) control passes to the label ".rbreak" (line
820). Because it can take a couple of seconds to catalogue the RFS the
keyboard is disabled to prevent unwanted input, particularly Escape
(lines 830-860). The buffers are flushed (lines 870-890), the two zero
page bytes used by the print subroutine are stored on the stack (lines
900-930) and a header to the catalogue is printed (lines 940-990). The
RFS is selected (lines 1000-1010) and the Osbyte equivalent of *OPT1,2
is used to enable extended filing system messages (lines 1020-1050).
The command line interpreter is instructed to catalogue the RFS
(lines 1060-1080), the default *OPT 1,0 is reselected (lines
1090-1120) and a message informing the user that the RFS is active is
printed (lines 1130-1190). The two zero page bytes used by the print
subroutine are restored (lines 1200-1230), the keyboard is re-enabled
(lines 1240-1270), and the stack balanced before returning control to
the MOS with the accumulator reset to zero (lines 1280-1320).
BOOTRFS is used to create RFS rom images in the same way that
RFSHEAD was used in module 18. Load the rom image created by BOOTRFS
into sideways ram and press Ctrl+R+Break to select and catalogue the
RFS. If you use the program DEMO you should get a screen display
similar to that in figure 19.2.
Acorn TUBE 6502 64K
ROM Filing System Catalogue
DEMO 08 08D1 00001900 00002194
ROM Filing System active
BASIC
>
Figure 19.2 The display after Ctrl+R+Break.
----------- -------------------------------
With the RFS active you can run the demonstration program by typing
CHAIN "DEMO" or *RUN "DEMO". The supplied BASIC program DEMO has been
written so that it can be *RUN as well as chained. Most BASIC programs
can only be chained from the RFS, or any other filing systems.
10 REM: BOOTRFS
20 MODE7
30 HIMEM=&3C00
40 diff=&8000-HIMEM
50 H%=HIMEM
60 address=&70
70 romnumber=&F4
80 phrom=&F5
90 rompoint=&F6
100 osasci=&FFE3
110 osnewl=&FFE7
120 osbyte=&FFF4
130 oscli=&FFF7
140 FOR pass = 0 TO 2 STEP 2
150 P%=HIMEM
160 [ OPT pass
170 BRK
180 BRK
190 BRK
200 JMP service+diff
210 OPT FNequb(&82)
220 OPT FNequb((copyright+diff) MOD 256)
230 BRK
240 OPT FNequs("BOOTRFS")
250 .copyright
260 BRK
270 OPT FNequs("(C) Gordon Horsington 1987")
280 BRK
290 .service
300 PHA
310 CMP #13
320 BNE fourteen
330 TYA
340 EOR #&F
350 CMP romnumber
360 BCC out
370 LDA #(lastbyte+diff) MOD 256
380 STA rompoint
390 LDA #(lastbyte+diff) DIV 256
400 STA rompoint+1
410 LDA romnumber
420 EOR #&F
430 STA phrom
440 .exit
450 PLA
460 LDA #0
470 RTS
480 .fourteen
490 CMP #14
500 BNE trythree
510 LDA phrom
520 EOR #&F
530 CMP romnumber
540 BNE out
550 LDY #0
560 LDA (rompoint),Y
570 TAY
580 INC rompoint
590 BNE exit
600 INC rompoint+1
610 JMP exit+diff
620 .out
630 PLA
640 RTS
650 .trythree
660 CMP #3
670 BNE out
680 TXA
690 PHA
700 TYA
710 PHA
720 LDA #&7A
730 JSR osbyte
740 CPX #&33 \ Is it R Break?
750 BEQ rbreak
760 PLA
770 TAY
780 PLA
790 TAX
800 PLA
810 RTS
820 .rbreak
830 LDA #&C9
840 LDX #1
850 LDY #0
860 JSR osbyte \ Disable keyboard
870 LDA #&0F
880 LDX #0
890 JSR osbyte \ Flush all buffers
900 LDA address
910 PHA
920 LDA address+1
930 PHA
940 LDX #(rfs+diff) MOD 256
950 LDY #(rfs+diff) DIV 256
960 JSR print+diff
970 LDX #(cat+diff) MOD 256
980 LDY #(cat+diff) DIV 256
990 JSR print+diff
1000 LDA #&8D
1010 JSR osbyte \ Select RFS
1020 LDA #&8B
1030 LDX #1
1040 LDY #2
1050 JSR osbyte \ *OPT1,2
1060 LDX #(dot+diff) MOD 256
1070 LDY #(dot+diff) DIV 256
1080 JSR oscli \ Catalogue RFS
1090 LDA #&8B
1100 LDX #0
1110 LDY #0
1120 JSR osbyte \ *OPT 1,0
1130 JSR osnewl
1140 LDX #(rfs+diff) MOD 256
1150 LDY #(rfs+diff) DIV 256
1160 JSR print+diff
1170 LDX #(act+diff) MOD 256
1180 LDY #(act+diff) DIV 256
1190 JSR print+diff
1200 PLA
1210 STA address+1
1220 PLA
1230 STA address
1240 LDA #&C9
1250 LDX #0
1260 LDY #0
1270 JSR osbyte \ Enable keyboard
1280 PLA
1290 PLA
1300 PLA
1310 LDA #0
1320 RTS
1330 .print
1340 STX address
1350 STY address+1
1360 LDY #&FF
1370 .printloop
1380 INY
1390 LDA (address),Y
1400 BEQ endprint
1410 JSR osasci
1420 JMP printloop+diff
1430 .endprint
1440 RTS
1450 .dot
1460 OPT FNequs("CAT")
1470 OPT FNequb(&0D)
1480 .rfs
1490 OPT FNequs("ROM Filing System ")
1500 BRK
1510 .cat
1520 OPT FNequs("Catalogue")
1530 OPT FNequb(&0D)
1540 BRK
1550 .act
1560 OPT FNequs("active")
1570 OPT FNequw(&0D0D)
1580 BRK
1590 .lastbyte
1600 ]
1610 NEXT
1620 O%=lastbyte
1630 CHAIN"RFSGEN"
1640 DEFFNequb(byte)
1650 ?P%=byte
1660 P%=P%+1
1670 =pass
1680 DEFFNequw(word)
1690 ?P%=word MOD 256
1700 P%?1=word DIV 256
1710 P%=P%+2
1720 =pass
1730 DEFFNequd(double)
1740 !P%=double
1750 P%=P%+4
1760 =pass
1770 DEFFNequs(string$)
1780 $P%=string$
1790 P%=P%+LEN(string$)
1800 =pass
00000000 4d 61 73 74 65 72 69 6e 67 20 53 69 64 65 77 61 |Mastering Sidewa|
00000010 79 73 20 52 4f 4d 20 26 20 52 41 4d 20 2d 20 4d |ys ROM & RAM - M|
00000020 6f 64 75 6c 65 20 31 39 20 2d 20 41 75 74 6f 62 |odule 19 - Autob|
00000030 6f 6f 74 20 52 46 53 0d 2d 2d 2d 2d 2d 2d 2d 2d |oot RFS.--------|
00000040 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000060 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 0d |---------------.|
00000070 0d 20 20 4d 6f 73 74 20 6f 66 20 74 68 65 20 66 |. Most of the f|
00000080 69 6c 69 6e 67 20 73 79 73 74 65 6d 73 20 6f 6e |iling systems on|
00000090 20 74 68 65 20 42 42 43 20 6d 69 63 72 6f 63 6f | the BBC microco|
000000a0 6d 70 75 74 65 72 20 63 61 6e 20 62 65 20 73 65 |mputer can be se|
000000b0 6c 65 63 74 65 64 0d 28 62 6f 6f 74 65 64 20 69 |lected.(booted i|
000000c0 6e 20 6d 69 63 72 6f 2d 73 70 65 61 6b 29 20 62 |n micro-speak) b|
000000d0 79 20 68 6f 6c 64 69 6e 67 20 64 6f 77 6e 20 43 |y holding down C|
000000e0 54 52 4c 20 77 69 74 68 20 61 20 66 69 6c 69 6e |TRL with a filin|
000000f0 67 20 73 79 73 74 65 6d 20 62 6f 6f 74 0d 6b 65 |g system boot.ke|
00000100 79 20 61 6e 64 20 74 68 65 6e 20 70 72 65 73 73 |y and then press|
00000110 69 6e 67 20 61 6e 64 20 72 65 6c 65 61 73 69 6e |ing and releasin|
00000120 67 20 74 68 65 20 42 72 65 61 6b 20 6b 65 79 2e |g the Break key.|
00000130 20 54 68 65 20 44 46 53 20 63 61 6e 20 62 65 0d | The DFS can be.|
00000140 62 6f 6f 74 65 64 20 77 69 74 68 20 43 74 72 6c |booted with Ctrl|
00000150 2b 44 2b 42 72 65 61 6b 2c 20 74 68 65 20 41 44 |+D+Break, the AD|
00000160 46 53 20 77 69 74 68 20 43 74 72 6c 2b 46 2b 42 |FS with Ctrl+F+B|
00000170 72 65 61 6b 2c 20 74 68 65 20 54 61 70 65 20 46 |reak, the Tape F|
00000180 69 6c 69 6e 67 0d 73 79 73 74 65 6d 20 77 69 74 |iling.system wit|
00000190 68 20 43 74 72 6c 2b 53 70 61 63 65 2b 42 72 65 |h Ctrl+Space+Bre|
000001a0 61 6b 20 61 6e 64 20 74 68 65 20 4e 65 74 77 6f |ak and the Netwo|
000001b0 72 6b 20 46 69 6c 69 6e 67 20 73 79 73 74 65 6d |rk Filing system|
000001c0 20 77 69 74 68 0d 43 74 72 6c 2b 4e 2b 42 72 65 | with.Ctrl+N+Bre|
000001d0 61 6b 2e 20 59 6f 75 20 6d 69 67 68 74 20 65 78 |ak. You might ex|
000001e0 70 65 63 74 20 74 68 65 20 52 46 53 20 74 6f 20 |pect the RFS to |
000001f0 62 6f 6f 74 20 77 69 74 68 20 43 74 72 6c 2b 52 |boot with Ctrl+R|
00000200 2b 42 72 65 61 6b 20 62 75 74 0d 69 66 20 79 6f |+Break but.if yo|
00000210 75 20 74 72 79 20 69 74 20 79 6f 75 20 77 69 6c |u try it you wil|
00000220 6c 20 62 65 20 64 69 73 61 70 70 6f 69 6e 74 65 |l be disappointe|
00000230 64 2c 20 69 74 20 64 6f 65 73 20 6e 6f 74 20 77 |d, it does not w|
00000240 6f 72 6b 2e 20 54 68 65 20 52 46 53 20 69 73 0d |ork. The RFS is.|
00000250 74 68 65 20 6f 6e 6c 79 20 66 69 6c 69 6e 67 20 |the only filing |
00000260 73 79 73 74 65 6d 20 74 68 61 74 20 63 61 6e 20 |system that can |
00000270 6e 6f 74 20 62 65 20 62 6f 6f 74 65 64 20 69 6e |not be booted in|
00000280 20 74 68 69 73 20 77 61 79 2e 20 49 6e 20 74 68 | this way. In th|
00000290 69 73 0d 6d 6f 64 75 6c 65 20 49 20 77 69 6c 6c |is.module I will|
000002a0 20 73 68 6f 77 20 79 6f 75 20 68 6f 77 20 74 6f | show you how to|
000002b0 20 6d 6f 64 69 66 79 20 74 68 65 20 52 46 53 20 | modify the RFS |
000002c0 69 6e 74 65 72 70 72 65 74 65 72 20 75 73 65 64 |interpreter used|
000002d0 20 69 6e 0d 4d 6f 64 75 6c 65 20 31 38 20 74 6f | in.Module 18 to|
000002e0 20 69 6e 63 6c 75 64 65 20 62 6f 6f 74 69 6e 67 | include booting|
000002f0 20 74 68 65 20 52 46 53 20 77 69 74 68 20 43 74 | the RFS with Ct|
00000300 72 6c 2b 52 2b 42 72 65 61 6b 2e 0d 0d 20 20 54 |rl+R+Break... T|
00000310 68 65 20 42 42 43 20 42 20 69 73 73 75 65 73 20 |he BBC B issues |
00000320 73 65 72 76 69 63 65 20 63 61 6c 6c 20 33 20 6f |service call 3 o|
00000330 6e 20 62 6f 74 68 20 68 61 72 64 20 61 6e 64 20 |n both hard and |
00000340 73 6f 66 74 20 72 65 73 65 74 2e 20 54 68 65 0d |soft reset. The.|
00000350 4d 61 73 74 65 72 20 69 73 73 75 65 73 20 69 74 |Master issues it|
00000360 20 6f 6e 6c 79 20 6f 6e 20 68 61 72 64 20 72 65 | only on hard re|
00000370 73 65 74 2e 20 54 68 69 73 20 73 65 72 76 69 63 |set. This servic|
00000380 65 20 63 61 6c 6c 20 69 73 20 69 73 73 75 65 64 |e call is issued|
00000390 0d 70 72 69 6d 61 72 69 6c 79 20 74 6f 20 61 6c |.primarily to al|
000003a0 6c 6f 77 20 66 69 6c 69 6e 67 20 73 79 73 74 65 |low filing syste|
000003b0 6d 73 20 74 6f 20 62 65 20 69 6e 69 74 69 61 6c |ms to be initial|
000003c0 69 73 65 64 20 6f 6e 20 62 72 65 61 6b 20 72 61 |ised on break ra|
000003d0 74 68 65 72 0d 74 68 61 6e 20 68 61 76 69 6e 67 |ther.than having|
000003e0 20 74 6f 20 62 65 20 72 65 73 65 6c 65 63 74 65 | to be reselecte|
000003f0 64 20 65 76 65 72 79 20 74 69 6d 65 20 77 69 74 |d every time wit|
00000400 68 20 61 6e 20 6f 70 65 72 61 74 69 6e 67 20 73 |h an operating s|
00000410 79 73 74 65 6d 0d 63 6f 6d 6d 61 6e 64 2e 20 41 |ystem.command. A|
00000420 6e 79 20 73 65 72 76 69 63 65 20 72 6f 6d 20 63 |ny service rom c|
00000430 61 6e 20 69 6e 74 65 72 63 65 70 74 20 74 68 69 |an intercept thi|
00000440 73 20 63 61 6c 6c 20 74 6f 20 65 78 65 63 75 74 |s call to execut|
00000450 65 20 61 6e 79 0d 72 6f 75 74 69 6e 65 20 62 75 |e any.routine bu|
00000460 74 20 69 74 20 73 68 6f 75 6c 64 20 6f 6e 6c 79 |t it should only|
00000470 20 74 72 61 70 70 65 64 20 69 66 20 61 20 6b 65 | trapped if a ke|
00000480 79 20 65 78 63 6c 75 73 69 76 65 20 74 6f 20 74 |y exclusive to t|
00000490 68 61 74 20 72 6f 6d 20 69 73 0d 70 72 65 73 73 |hat rom is.press|
000004a0 65 64 2e 20 54 68 65 20 65 78 61 6d 70 6c 65 20 |ed. The example |
000004b0 70 72 6f 67 72 61 6d 20 42 4f 4f 54 52 46 53 20 |program BOOTRFS |
000004c0 77 69 6c 6c 20 69 6e 74 65 72 63 65 70 74 20 73 |will intercept s|
000004d0 65 72 76 69 63 65 20 63 61 6c 6c 20 33 20 61 6e |ervice call 3 an|
000004e0 64 0d 75 73 65 20 4f 73 62 79 74 65 20 26 37 41 |d.use Osbyte &7A|
000004f0 20 74 6f 20 72 65 61 64 20 74 68 65 20 69 6e 74 | to read the int|
00000500 65 72 6e 61 6c 20 6b 65 79 20 6e 75 6d 62 65 72 |ernal key number|
00000510 20 6f 66 20 61 6e 79 20 6b 65 79 20 70 72 65 73 | of any key pres|
00000520 73 65 64 20 61 6e 64 2c 0d 69 66 20 74 68 65 20 |sed and,.if the |
00000530 69 6e 74 65 72 6e 61 6c 20 6b 65 79 20 6e 75 6d |internal key num|
00000540 62 65 72 20 66 6f 72 20 22 52 22 20 69 73 20 66 |ber for "R" is f|
00000550 6f 75 6e 64 2c 20 69 74 20 77 69 6c 6c 20 73 65 |ound, it will se|
00000560 6c 65 63 74 20 61 6e 64 0d 63 61 74 61 6c 6f 67 |lect and.catalog|
00000570 75 65 20 74 68 65 20 52 46 53 2e 0d 0d 20 20 4f |ue the RFS... O|
00000580 73 62 79 74 65 20 26 37 41 20 68 61 73 20 6e 6f |sbyte &7A has no|
00000590 20 65 6e 74 72 79 20 70 61 72 61 6d 65 74 65 72 | entry parameter|
000005a0 73 20 61 6e 64 20 72 65 74 75 72 6e 73 20 74 68 |s and returns th|
000005b0 65 20 69 6e 74 65 72 6e 61 6c 20 6b 65 79 0d 6e |e internal key.n|
000005c0 75 6d 62 65 72 20 69 6e 20 74 68 65 20 58 20 72 |umber in the X r|
000005d0 65 67 69 73 74 65 72 2e 20 54 68 65 20 69 6e 74 |egister. The int|
000005e0 65 72 6e 61 6c 20 6b 65 79 20 6e 75 6d 62 65 72 |ernal key number|
000005f0 73 20 61 72 65 20 6e 6f 74 20 70 72 69 6e 74 65 |s are not printe|
00000600 64 20 69 6e 0d 74 68 65 20 42 42 43 20 42 20 55 |d in.the BBC B U|
00000610 73 65 72 20 47 75 69 64 65 20 62 75 74 20 74 68 |ser Guide but th|
00000620 65 20 49 4e 4b 45 59 20 6e 75 6d 62 65 72 73 20 |e INKEY numbers |
00000630 61 72 65 20 6c 69 73 74 65 64 20 69 6e 20 74 68 |are listed in th|
00000640 65 20 42 41 53 49 43 0d 6b 65 79 77 6f 72 64 20 |e BASIC.keyword |
00000650 73 65 63 74 69 6f 6e 2e 20 54 68 65 20 49 4e 4b |section. The INK|
00000660 45 59 20 6e 75 6d 62 65 72 20 63 61 6e 20 62 65 |EY number can be|
00000670 20 63 6f 6e 76 65 72 74 65 64 20 69 6e 74 6f 20 | converted into |
00000680 61 6e 20 49 6e 74 65 72 6e 61 6c 0d 4b 65 79 20 |an Internal.Key |
00000690 4e 75 6d 62 65 72 20 62 79 20 45 78 63 6c 75 73 |Number by Exclus|
000006a0 69 76 65 20 4f 52 69 6e 67 20 69 74 20 77 69 74 |ive ORing it wit|
000006b0 68 20 26 46 46 2e 20 46 6f 72 20 65 78 61 6d 70 |h &FF. For examp|
000006c0 6c 65 2c 20 74 68 65 20 49 4e 4b 45 59 0d 6e 75 |le, the INKEY.nu|
000006d0 6d 62 65 72 20 66 6f 72 20 52 20 69 73 20 2d 35 |mber for R is -5|
000006e0 32 2e 20 54 6f 20 66 69 6e 64 20 74 68 65 20 69 |2. To find the i|
000006f0 6e 74 65 72 6e 61 6c 20 6b 65 79 20 6e 75 6d 62 |nternal key numb|
00000700 65 72 20 74 79 70 65 3a 0d 0d 3e 50 52 49 4e 54 |er type:..>PRINT|
00000710 20 7e 20 2d 35 32 20 45 4f 52 20 26 46 46 0d 20 | ~ -52 EOR &FF. |
00000720 20 46 46 46 46 46 46 33 33 0d 3e 0d 0d 61 6e 64 | FFFFFF33.>..and|
00000730 20 74 68 65 20 61 6e 73 77 65 72 2c 20 69 67 6e | the answer, ign|
00000740 6f 72 69 6e 67 20 74 68 65 20 6c 65 61 64 69 6e |oring the leadin|
00000750 67 20 46 73 2c 20 69 73 20 26 33 33 2e 0d 0d 20 |g Fs, is &33... |
00000760 20 46 69 67 75 72 65 20 31 39 2e 31 20 73 68 6f | Figure 19.1 sho|
00000770 77 73 20 74 68 65 20 63 6f 64 69 6e 67 20 74 68 |ws the coding th|
00000780 61 74 20 6e 65 65 64 73 20 74 6f 20 62 65 20 61 |at needs to be a|
00000790 64 64 65 64 20 74 6f 20 61 20 53 57 52 0d 69 6e |dded to a SWR.in|
000007a0 74 65 72 70 72 65 74 65 72 20 74 6f 20 69 6e 74 |terpreter to int|
000007b0 65 72 63 65 70 74 20 73 65 72 76 69 63 65 20 63 |ercept service c|
000007c0 61 6c 6c 20 33 20 61 6e 64 20 61 75 74 6f 2d 62 |all 3 and auto-b|
000007d0 6f 6f 74 20 74 68 65 20 52 46 53 20 6f 6e 0d 43 |oot the RFS on.C|
000007e0 74 72 6c 2b 52 2b 42 72 65 61 6b 2e 20 54 68 65 |trl+R+Break. The|
000007f0 20 61 75 74 6f 2d 62 6f 6f 74 20 63 6f 64 69 6e | auto-boot codin|
00000800 67 20 63 61 6e 20 62 65 20 69 6e 63 6c 75 64 65 |g can be include|
00000810 64 20 69 6e 20 61 6e 79 20 53 57 52 0d 69 6e 74 |d in any SWR.int|
00000820 65 72 70 72 65 74 65 72 2c 20 69 74 20 64 6f 65 |erpreter, it doe|
00000830 73 20 6e 6f 74 20 68 61 76 65 20 74 6f 20 62 65 |s not have to be|
00000840 20 69 6e 20 61 20 72 6f 6d 20 77 69 74 68 20 52 | in a rom with R|
00000850 46 53 20 66 69 6c 65 73 2e 20 46 69 67 75 72 65 |FS files. Figure|
00000860 0d 31 39 2e 31 20 69 6c 6c 75 73 74 72 61 74 65 |.19.1 illustrate|
00000870 73 20 74 68 61 74 20 69 66 2c 20 61 66 74 65 72 |s that if, after|
00000880 20 69 6e 74 65 72 63 65 70 74 69 6e 67 20 73 65 | intercepting se|
00000890 72 76 69 63 65 20 63 61 6c 6c 20 33 2c 20 4f 73 |rvice call 3, Os|
000008a0 62 79 74 65 0d 26 37 41 20 72 65 74 75 72 6e 73 |byte.&7A returns|
000008b0 20 77 69 74 68 20 58 3d 26 33 33 20 74 68 65 6e | with X=&33 then|
000008c0 20 43 74 72 6c 2b 52 2b 42 72 65 61 6b 20 68 61 | Ctrl+R+Break ha|
000008d0 73 20 62 65 65 6e 20 70 72 65 73 73 65 64 20 61 |s been pressed a|
000008e0 6e 64 20 79 6f 75 72 0d 70 72 6f 67 72 61 6d 20 |nd your.program |
000008f0 63 61 6e 20 75 73 65 20 4f 73 62 79 74 65 20 26 |can use Osbyte &|
00000900 38 44 20 74 6f 20 73 65 6c 65 63 74 20 74 68 65 |8D to select the|
00000910 20 52 46 53 2e 20 54 68 65 20 72 6f 75 74 69 6e | RFS. The routin|
00000920 65 20 72 65 74 75 72 6e 73 0d 63 6f 6e 74 72 6f |e returns.contro|
00000930 6c 20 74 6f 20 74 68 65 20 4d 4f 53 20 61 66 74 |l to the MOS aft|
00000940 65 72 20 62 61 6c 61 6e 63 69 6e 67 20 74 68 65 |er balancing the|
00000950 20 73 74 61 63 6b 20 61 6e 64 20 72 65 73 65 74 | stack and reset|
00000960 69 6e 67 20 74 68 65 0d 61 63 63 75 6d 75 6c 61 |ing the.accumula|
00000970 74 6f 72 20 74 6f 20 7a 65 72 6f 2e 0d 0d 0d 20 |tor to zero.... |
00000980 2e 74 72 79 74 68 72 65 65 0d 20 20 20 20 20 20 |.trythree. |
00000990 20 20 43 4d 50 20 23 33 20 20 20 20 20 20 20 20 | CMP #3 |
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00000b80 20 20 20 20 54 41 58 20 20 20 20 20 20 20 20 20 | TAX |
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00000ba0 20 20 20 20 20 20 50 4c 41 20 20 20 20 20 20 20 | PLA |
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00000bc0 20 20 20 20 20 20 20 20 52 54 53 20 20 20 20 20 | RTS |
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00000c30 34 20 20 20 20 20 5c 20 2a 52 4f 4d 0d 20 20 20 |4 \ *ROM. |
00000c40 20 20 20 20 20 50 4c 41 20 20 20 20 20 20 20 20 | PLA |
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00000c60 20 20 20 20 20 20 20 50 4c 41 20 20 20 20 20 20 | PLA |
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00000c80 0d 20 20 20 20 20 20 20 20 50 4c 41 20 20 20 20 |. PLA |
00000c90 20 20 20 20 20 20 20 5c 20 64 69 73 63 61 72 64 | \ discard|
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000011a0 20 62 79 20 74 68 65 20 70 72 69 6e 74 20 73 75 | by the print su|
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000015d0 20 53 79 73 74 65 6d 20 43 61 74 61 6c 6f 67 75 | System Catalogu|
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00001680 2d 2d 2d 2d 2d 2d 2d 2d 2d 0d 0d 0d 0d 0d 20 20 |---------..... |
00001690 57 69 74 68 20 74 68 65 20 52 46 53 20 61 63 74 |With the RFS act|
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00001890 0d 20 20 31 34 30 20 46 4f 52 20 70 61 73 73 20 |. 140 FOR pass |
000018a0 3d 20 30 20 54 4f 20 32 20 53 54 45 50 20 32 0d |= 0 TO 2 STEP 2.|
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000018c0 20 31 36 30 20 5b 20 20 20 20 20 20 20 4f 50 54 | 160 [ OPT|
000018d0 20 70 61 73 73 0d 20 20 31 37 30 20 20 20 20 20 | pass. 170 |
000018e0 20 20 20 20 42 52 4b 0d 20 20 31 38 30 20 20 20 | BRK. 180 |
000018f0 20 20 20 20 20 20 42 52 4b 0d 20 20 31 39 30 20 | BRK. 190 |
00001900 20 20 20 20 20 20 20 20 42 52 4b 0d 20 20 32 30 | BRK. 20|
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00001930 20 20 20 20 20 20 20 20 20 4f 50 54 20 46 4e 65 | OPT FNe|
00001940 71 75 62 28 26 38 32 29 0d 20 20 32 32 30 20 20 |qub(&82). 220 |
00001950 20 20 20 20 20 20 20 4f 50 54 20 46 4e 65 71 75 | OPT FNequ|
00001960 62 28 28 63 6f 70 79 72 69 67 68 74 2b 64 69 66 |b((copyright+dif|
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000019d0 20 42 52 4b 0d 20 20 32 37 30 20 20 20 20 20 20 | BRK. 270 |
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000019f0 43 29 20 47 6f 72 64 6f 6e 20 48 6f 72 73 69 6e |C) Gordon Horsin|
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00001a10 30 20 20 20 20 20 20 20 20 20 42 52 4b 0d 20 20 |0 BRK. |
00001a20 32 39 30 20 2e 73 65 72 76 69 63 65 0d 20 20 33 |290 .service. 3|
00001a30 30 30 20 20 20 20 20 20 20 20 20 50 48 41 0d 20 |00 PHA. |
00001a40 20 33 31 30 20 20 20 20 20 20 20 20 20 43 4d 50 | 310 CMP|
00001a50 20 23 31 33 0d 20 20 33 32 30 20 20 20 20 20 20 | #13. 320 |
00001a60 20 20 20 42 4e 45 20 66 6f 75 72 74 65 65 6e 0d | BNE fourteen.|
00001a70 20 20 33 33 30 20 20 20 20 20 20 20 20 20 54 59 | 330 TY|
00001a80 41 0d 20 20 33 34 30 20 20 20 20 20 20 20 20 20 |A. 340 |
00001a90 45 4f 52 20 23 26 46 0d 20 20 33 35 30 20 20 20 |EOR #&F. 350 |
00001aa0 20 20 20 20 20 20 43 4d 50 20 72 6f 6d 6e 75 6d | CMP romnum|
00001ab0 62 65 72 0d 20 20 33 36 30 20 20 20 20 20 20 20 |ber. 360 |
00001ac0 20 20 42 43 43 20 6f 75 74 0d 20 20 33 37 30 20 | BCC out. 370 |
00001ad0 20 20 20 20 20 20 20 20 4c 44 41 20 23 28 6c 61 | LDA #(la|
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00001b00 20 20 20 53 54 41 20 72 6f 6d 70 6f 69 6e 74 0d | STA rompoint.|
00001b10 20 20 33 39 30 20 20 20 20 20 20 20 20 20 4c 44 | 390 LD|
00001b20 41 20 23 28 6c 61 73 74 62 79 74 65 2b 64 69 66 |A #(lastbyte+dif|
00001b30 66 29 20 44 49 56 20 32 35 36 0d 20 20 34 30 30 |f) DIV 256. 400|
00001b40 20 20 20 20 20 20 20 20 20 53 54 41 20 72 6f 6d | STA rom|
00001b50 70 6f 69 6e 74 2b 31 0d 20 20 34 31 30 20 20 20 |point+1. 410 |
00001b60 20 20 20 20 20 20 4c 44 41 20 72 6f 6d 6e 75 6d | LDA romnum|
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00001b80 20 20 45 4f 52 20 23 26 46 0d 20 20 34 33 30 20 | EOR #&F. 430 |
00001b90 20 20 20 20 20 20 20 20 53 54 41 20 70 68 72 6f | STA phro|
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00001bb0 34 35 30 20 20 20 20 20 20 20 20 20 50 4c 41 0d |450 PLA.|
00001bc0 20 20 34 36 30 20 20 20 20 20 20 20 20 20 4c 44 | 460 LD|
00001bd0 41 20 23 30 0d 20 20 34 37 30 20 20 20 20 20 20 |A #0. 470 |
00001be0 20 20 20 52 54 53 0d 20 20 34 38 30 20 2e 66 6f | RTS. 480 .fo|
00001bf0 75 72 74 65 65 6e 0d 20 20 34 39 30 20 20 20 20 |urteen. 490 |
00001c00 20 20 20 20 20 43 4d 50 20 23 31 34 0d 20 20 35 | CMP #14. 5|
00001c10 30 30 20 20 20 20 20 20 20 20 20 42 4e 45 20 74 |00 BNE t|
00001c20 72 79 74 68 72 65 65 0d 20 20 35 31 30 20 20 20 |rythree. 510 |
00001c30 20 20 20 20 20 20 4c 44 41 20 70 68 72 6f 6d 0d | LDA phrom.|
00001c40 20 20 35 32 30 20 20 20 20 20 20 20 20 20 45 4f | 520 EO|
00001c50 52 20 23 26 46 0d 20 20 35 33 30 20 20 20 20 20 |R #&F. 530 |
00001c60 20 20 20 20 43 4d 50 20 72 6f 6d 6e 75 6d 62 65 | CMP romnumbe|
00001c70 72 0d 20 20 35 34 30 20 20 20 20 20 20 20 20 20 |r. 540 |
00001c80 42 4e 45 20 6f 75 74 0d 20 20 35 35 30 20 20 20 |BNE out. 550 |
00001c90 20 20 20 20 20 20 4c 44 59 20 23 30 0d 20 20 35 | LDY #0. 5|
00001ca0 36 30 20 20 20 20 20 20 20 20 20 4c 44 41 20 28 |60 LDA (|
00001cb0 72 6f 6d 70 6f 69 6e 74 29 2c 59 0d 20 20 35 37 |rompoint),Y. 57|
00001cc0 30 20 20 20 20 20 20 20 20 20 54 41 59 0d 20 20 |0 TAY. |
00001cd0 35 38 30 20 20 20 20 20 20 20 20 20 49 4e 43 20 |580 INC |
00001ce0 72 6f 6d 70 6f 69 6e 74 0d 20 20 35 39 30 20 20 |rompoint. 590 |
00001cf0 20 20 20 20 20 20 20 42 4e 45 20 65 78 69 74 0d | BNE exit.|
00001d00 20 20 36 30 30 20 20 20 20 20 20 20 20 20 49 4e | 600 IN|
00001d10 43 20 72 6f 6d 70 6f 69 6e 74 2b 31 0d 20 20 36 |C rompoint+1. 6|
00001d20 31 30 20 20 20 20 20 20 20 20 20 4a 4d 50 20 65 |10 JMP e|
00001d30 78 69 74 2b 64 69 66 66 0d 20 20 36 32 30 20 2e |xit+diff. 620 .|
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00001d50 20 20 50 4c 41 0d 20 20 36 34 30 20 20 20 20 20 | PLA. 640 |
00001d60 20 20 20 20 52 54 53 0d 20 20 36 35 30 20 2e 74 | RTS. 650 .t|
00001d70 72 79 74 68 72 65 65 0d 20 20 36 36 30 20 20 20 |rythree. 660 |
00001d80 20 20 20 20 20 20 43 4d 50 20 23 33 0d 20 20 36 | CMP #3. 6|
00001d90 37 30 20 20 20 20 20 20 20 20 20 42 4e 45 20 6f |70 BNE o|
00001da0 75 74 0d 20 20 36 38 30 20 20 20 20 20 20 20 20 |ut. 680 |
00001db0 20 54 58 41 0d 20 20 36 39 30 20 20 20 20 20 20 | TXA. 690 |
00001dc0 20 20 20 50 48 41 0d 20 20 37 30 30 20 20 20 20 | PHA. 700 |
00001dd0 20 20 20 20 20 54 59 41 0d 20 20 37 31 30 20 20 | TYA. 710 |
00001de0 20 20 20 20 20 20 20 50 48 41 0d 20 20 37 32 30 | PHA. 720|
00001df0 20 20 20 20 20 20 20 20 20 4c 44 41 20 23 26 37 | LDA #&7|
00001e00 41 0d 20 20 37 33 30 20 20 20 20 20 20 20 20 20 |A. 730 |
00001e10 4a 53 52 20 6f 73 62 79 74 65 0d 20 20 37 34 30 |JSR osbyte. 740|
00001e20 20 20 20 20 20 20 20 20 20 43 50 58 20 23 26 33 | CPX #&3|
00001e30 33 20 20 20 20 20 20 5c 20 49 73 20 69 74 20 52 |3 \ Is it R|
00001e40 20 42 72 65 61 6b 3f 0d 20 20 37 35 30 20 20 20 | Break?. 750 |
00001e50 20 20 20 20 20 20 42 45 51 20 72 62 72 65 61 6b | BEQ rbreak|
00001e60 0d 20 20 37 36 30 20 20 20 20 20 20 20 20 20 50 |. 760 P|
00001e70 4c 41 0d 20 20 37 37 30 20 20 20 20 20 20 20 20 |LA. 770 |
00001e80 20 54 41 59 0d 20 20 37 38 30 20 20 20 20 20 20 | TAY. 780 |
00001e90 20 20 20 50 4c 41 0d 20 20 37 39 30 20 20 20 20 | PLA. 790 |
00001ea0 20 20 20 20 20 54 41 58 0d 20 20 38 30 30 20 20 | TAX. 800 |
00001eb0 20 20 20 20 20 20 20 50 4c 41 0d 20 20 38 31 30 | PLA. 810|
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00001ed0 32 30 20 2e 72 62 72 65 61 6b 0d 20 20 38 33 30 |20 .rbreak. 830|
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00001f10 20 20 20 20 20 4c 44 59 20 23 30 0d 20 20 38 36 | LDY #0. 86|
00001f20 30 20 20 20 20 20 20 20 20 20 4a 53 52 20 6f 73 |0 JSR os|
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00001f40 65 20 6b 65 79 62 6f 61 72 64 0d 20 20 38 37 30 |e keyboard. 870|
00001f50 20 20 20 20 20 20 20 20 20 4c 44 41 20 23 26 30 | LDA #&0|
00001f60 46 0d 20 20 38 38 30 20 20 20 20 20 20 20 20 20 |F. 880 |
00001f70 4c 44 58 20 23 30 0d 20 20 38 39 30 20 20 20 20 |LDX #0. 890 |
00001f80 20 20 20 20 20 4a 53 52 20 6f 73 62 79 74 65 20 | JSR osbyte |
00001f90 20 20 20 5c 20 46 6c 75 73 68 20 61 6c 6c 20 62 | \ Flush all b|
00001fa0 75 66 66 65 72 73 0d 20 20 39 30 30 20 20 20 20 |uffers. 900 |
00001fb0 20 20 20 20 20 4c 44 41 20 61 64 64 72 65 73 73 | LDA address|
00001fc0 0d 20 20 39 31 30 20 20 20 20 20 20 20 20 20 50 |. 910 P|
00001fd0 48 41 0d 20 20 39 32 30 20 20 20 20 20 20 20 20 |HA. 920 |
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00001ff0 20 39 33 30 20 20 20 20 20 20 20 20 20 50 48 41 | 930 PHA|
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000020a0 59 20 23 28 63 61 74 2b 64 69 66 66 29 20 44 49 |Y #(cat+diff) DI|
000020b0 56 20 32 35 36 0d 20 20 39 39 30 20 20 20 20 20 |V 256. 990 |
000020c0 20 20 20 20 4a 53 52 20 70 72 69 6e 74 2b 64 69 | JSR print+di|
000020d0 66 66 0d 20 31 30 30 30 20 20 20 20 20 20 20 20 |ff. 1000 |
000020e0 20 4c 44 41 20 23 26 38 44 0d 20 31 30 31 30 20 | LDA #&8D. 1010 |
000020f0 20 20 20 20 20 20 20 20 4a 53 52 20 6f 73 62 79 | JSR osby|
00002100 74 65 20 20 20 20 5c 20 53 65 6c 65 63 74 20 52 |te \ Select R|
00002110 46 53 0d 20 31 30 32 30 20 20 20 20 20 20 20 20 |FS. 1020 |
00002120 20 4c 44 41 20 23 26 38 42 0d 20 31 30 33 30 20 | LDA #&8B. 1030 |
00002130 20 20 20 20 20 20 20 20 4c 44 58 20 23 31 0d 20 | LDX #1. |
00002140 31 30 34 30 20 20 20 20 20 20 20 20 20 4c 44 59 |1040 LDY|
00002150 20 23 32 0d 20 31 30 35 30 20 20 20 20 20 20 20 | #2. 1050 |
00002160 20 20 4a 53 52 20 6f 73 62 79 74 65 20 20 20 20 | JSR osbyte |
00002170 5c 20 2a 4f 50 54 31 2c 32 0d 20 31 30 36 30 20 |\ *OPT1,2. 1060 |
00002180 20 20 20 20 20 20 20 20 4c 44 58 20 23 28 64 6f | LDX #(do|
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000021a0 20 31 30 37 30 20 20 20 20 20 20 20 20 20 4c 44 | 1070 LD|
000021b0 59 20 23 28 64 6f 74 2b 64 69 66 66 29 20 44 49 |Y #(dot+diff) DI|
000021c0 56 20 32 35 36 0d 20 31 30 38 30 20 20 20 20 20 |V 256. 1080 |
000021d0 20 20 20 20 4a 53 52 20 6f 73 63 6c 69 20 20 20 | JSR oscli |
000021e0 20 20 5c 20 43 61 74 61 6c 6f 67 75 65 20 52 46 | \ Catalogue RF|
000021f0 53 0d 20 31 30 39 30 20 20 20 20 20 20 20 20 20 |S. 1090 |
00002200 4c 44 41 20 23 26 38 42 0d 20 31 31 30 30 20 20 |LDA #&8B. 1100 |
00002210 20 20 20 20 20 20 20 4c 44 58 20 23 30 0d 20 31 | LDX #0. 1|
00002220 31 31 30 20 20 20 20 20 20 20 20 20 4c 44 59 20 |110 LDY |
00002230 23 30 0d 20 31 31 32 30 20 20 20 20 20 20 20 20 |#0. 1120 |
00002240 20 4a 53 52 20 6f 73 62 79 74 65 20 20 20 20 5c | JSR osbyte \|
00002250 20 2a 4f 50 54 20 31 2c 30 0d 20 31 31 33 30 20 | *OPT 1,0. 1130 |
00002260 20 20 20 20 20 20 20 20 4a 53 52 20 6f 73 6e 65 | JSR osne|
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00002280 20 4c 44 58 20 23 28 72 66 73 2b 64 69 66 66 29 | LDX #(rfs+diff)|
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000022a0 20 20 20 20 20 20 20 4c 44 59 20 23 28 72 66 73 | LDY #(rfs|
000022b0 2b 64 69 66 66 29 20 44 49 56 20 32 35 36 0d 20 |+diff) DIV 256. |
000022c0 31 31 36 30 20 20 20 20 20 20 20 20 20 4a 53 52 |1160 JSR|
000022d0 20 70 72 69 6e 74 2b 64 69 66 66 0d 20 31 31 37 | print+diff. 117|
000022e0 30 20 20 20 20 20 20 20 20 20 4c 44 58 20 23 28 |0 LDX #(|
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00002320 44 49 56 20 32 35 36 0d 20 31 31 39 30 20 20 20 |DIV 256. 1190 |
00002330 20 20 20 20 20 20 4a 53 52 20 70 72 69 6e 74 2b | JSR print+|
00002340 64 69 66 66 0d 20 31 32 30 30 20 20 20 20 20 20 |diff. 1200 |
00002350 20 20 20 50 4c 41 0d 20 31 32 31 30 20 20 20 20 | PLA. 1210 |
00002360 20 20 20 20 20 53 54 41 20 61 64 64 72 65 73 73 | STA address|
00002370 2b 31 0d 20 31 32 32 30 20 20 20 20 20 20 20 20 |+1. 1220 |
00002380 20 50 4c 41 0d 20 31 32 33 30 20 20 20 20 20 20 | PLA. 1230 |
00002390 20 20 20 53 54 41 20 61 64 64 72 65 73 73 0d 20 | STA address. |
000023a0 31 32 34 30 20 20 20 20 20 20 20 20 20 4c 44 41 |1240 LDA|
000023b0 20 23 26 43 39 0d 20 31 32 35 30 20 20 20 20 20 | #&C9. 1250 |
000023c0 20 20 20 20 4c 44 58 20 23 30 0d 20 31 32 36 30 | LDX #0. 1260|
000023d0 20 20 20 20 20 20 20 20 20 4c 44 59 20 23 30 0d | LDY #0.|
000023e0 20 31 32 37 30 20 20 20 20 20 20 20 20 20 4a 53 | 1270 JS|
000023f0 52 20 6f 73 62 79 74 65 20 20 20 20 5c 20 45 6e |R osbyte \ En|
00002400 61 62 6c 65 20 6b 65 79 62 6f 61 72 64 0d 20 31 |able keyboard. 1|
00002410 32 38 30 20 20 20 20 20 20 20 20 20 50 4c 41 0d |280 PLA.|
00002420 20 31 32 39 30 20 20 20 20 20 20 20 20 20 50 4c | 1290 PL|
00002430 41 0d 20 31 33 30 30 20 20 20 20 20 20 20 20 20 |A. 1300 |
00002440 50 4c 41 0d 20 31 33 31 30 20 20 20 20 20 20 20 |PLA. 1310 |
00002450 20 20 4c 44 41 20 23 30 0d 20 31 33 32 30 20 20 | LDA #0. 1320 |
00002460 20 20 20 20 20 20 20 52 54 53 0d 20 31 33 33 30 | RTS. 1330|
00002470 20 2e 70 72 69 6e 74 0d 20 31 33 34 30 20 20 20 | .print. 1340 |
00002480 20 20 20 20 20 20 53 54 58 20 61 64 64 72 65 73 | STX addres|
00002490 73 0d 20 31 33 35 30 20 20 20 20 20 20 20 20 20 |s. 1350 |
000024a0 53 54 59 20 61 64 64 72 65 73 73 2b 31 0d 20 31 |STY address+1. 1|
000024b0 33 36 30 20 20 20 20 20 20 20 20 20 4c 44 59 20 |360 LDY |
000024c0 23 26 46 46 0d 20 31 33 37 30 20 2e 70 72 69 6e |#&FF. 1370 .prin|
000024d0 74 6c 6f 6f 70 0d 20 31 33 38 30 20 20 20 20 20 |tloop. 1380 |
000024e0 20 20 20 20 49 4e 59 0d 20 31 33 39 30 20 20 20 | INY. 1390 |
000024f0 20 20 20 20 20 20 4c 44 41 20 28 61 64 64 72 65 | LDA (addre|
00002500 73 73 29 2c 59 0d 20 31 34 30 30 20 20 20 20 20 |ss),Y. 1400 |
00002510 20 20 20 20 42 45 51 20 65 6e 64 70 72 69 6e 74 | BEQ endprint|
00002520 0d 20 31 34 31 30 20 20 20 20 20 20 20 20 20 4a |. 1410 J|
00002530 53 52 20 6f 73 61 73 63 69 0d 20 31 34 32 30 20 |SR osasci. 1420 |
00002540 20 20 20 20 20 20 20 20 4a 4d 50 20 70 72 69 6e | JMP prin|
00002550 74 6c 6f 6f 70 2b 64 69 66 66 0d 20 31 34 33 30 |tloop+diff. 1430|
00002560 20 2e 65 6e 64 70 72 69 6e 74 0d 20 31 34 34 30 | .endprint. 1440|
00002570 20 20 20 20 20 20 20 20 20 52 54 53 0d 20 31 34 | RTS. 14|
00002580 35 30 20 2e 64 6f 74 0d 20 31 34 36 30 20 20 20 |50 .dot. 1460 |
00002590 20 20 20 20 20 20 4f 50 54 20 46 4e 65 71 75 73 | OPT FNequs|
000025a0 28 22 43 41 54 22 29 0d 20 31 34 37 30 20 20 20 |("CAT"). 1470 |
000025b0 20 20 20 20 20 20 4f 50 54 20 46 4e 65 71 75 62 | OPT FNequb|
000025c0 28 26 30 44 29 0d 20 31 34 38 30 20 2e 72 66 73 |(&0D). 1480 .rfs|
000025d0 0d 20 31 34 39 30 20 20 20 20 20 20 20 20 20 4f |. 1490 O|
000025e0 50 54 20 46 4e 65 71 75 73 28 22 52 4f 4d 20 46 |PT FNequs("ROM F|
000025f0 69 6c 69 6e 67 20 53 79 73 74 65 6d 20 22 29 0d |iling System ").|
00002600 20 31 35 30 30 20 20 20 20 20 20 20 20 20 42 52 | 1500 BR|
00002610 4b 0d 20 31 35 31 30 20 2e 63 61 74 0d 20 31 35 |K. 1510 .cat. 15|
00002620 32 30 20 20 20 20 20 20 20 20 20 4f 50 54 20 46 |20 OPT F|
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00002640 22 29 0d 20 31 35 33 30 20 20 20 20 20 20 20 20 |"). 1530 |
00002650 20 4f 50 54 20 46 4e 65 71 75 62 28 26 30 44 29 | OPT FNequb(&0D)|
00002660 0d 20 31 35 34 30 20 20 20 20 20 20 20 20 20 42 |. 1540 B|
00002670 52 4b 0d 20 31 35 35 30 20 2e 61 63 74 0d 20 31 |RK. 1550 .act. 1|
00002680 35 36 30 20 20 20 20 20 20 20 20 20 4f 50 54 20 |560 OPT |
00002690 46 4e 65 71 75 73 28 22 61 63 74 69 76 65 22 29 |FNequs("active")|
000026a0 0d 20 31 35 37 30 20 20 20 20 20 20 20 20 20 4f |. 1570 O|
000026b0 50 54 20 46 4e 65 71 75 77 28 26 30 44 30 44 29 |PT FNequw(&0D0D)|
000026c0 0d 20 31 35 38 30 20 20 20 20 20 20 20 20 20 42 |. 1580 B|
000026d0 52 4b 0d 20 31 35 39 30 20 2e 6c 61 73 74 62 79 |RK. 1590 .lastby|
000026e0 74 65 0d 20 31 36 30 30 20 5d 0d 20 31 36 31 30 |te. 1600 ]. 1610|
000026f0 20 4e 45 58 54 0d 20 31 36 32 30 20 4f 25 3d 6c | NEXT. 1620 O%=l|
00002700 61 73 74 62 79 74 65 0d 20 31 36 33 30 20 43 48 |astbyte. 1630 CH|
00002710 41 49 4e 22 52 46 53 47 45 4e 22 0d 20 31 36 34 |AIN"RFSGEN". 164|
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00002740 0d 20 31 36 36 30 20 50 25 3d 50 25 2b 31 0d 20 |. 1660 P%=P%+1. |
00002750 31 36 37 30 20 3d 70 61 73 73 0d 20 31 36 38 30 |1670 =pass. 1680|
00002760 20 44 45 46 46 4e 65 71 75 77 28 77 6f 72 64 29 | DEFFNequw(word)|
00002770 0d 20 31 36 39 30 20 3f 50 25 3d 77 6f 72 64 20 |. 1690 ?P%=word |
00002780 4d 4f 44 20 32 35 36 0d 20 31 37 30 30 20 50 25 |MOD 256. 1700 P%|
00002790 3f 31 3d 77 6f 72 64 20 44 49 56 20 32 35 36 0d |?1=word DIV 256.|
000027a0 20 31 37 31 30 20 50 25 3d 50 25 2b 32 0d 20 31 | 1710 P%=P%+2. 1|
000027b0 37 32 30 20 3d 70 61 73 73 0d 20 31 37 33 30 20 |720 =pass. 1730 |
000027c0 44 45 46 46 4e 65 71 75 64 28 64 6f 75 62 6c 65 |DEFFNequd(double|
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000027e0 6c 65 0d 20 31 37 35 30 20 50 25 3d 50 25 2b 34 |le. 1750 P%=P%+4|
000027f0 0d 20 31 37 36 30 20 3d 70 61 73 73 0d 20 31 37 |. 1760 =pass. 17|
00002800 37 30 20 44 45 46 46 4e 65 71 75 73 28 73 74 72 |70 DEFFNequs(str|
00002810 69 6e 67 24 29 0d 20 31 37 38 30 20 24 50 25 3d |ing$). 1780 $P%=|
00002820 73 74 72 69 6e 67 24 0d 20 31 37 39 30 20 50 25 |string$. 1790 P%|
00002830 3d 50 25 2b 4c 45 4e 28 73 74 72 69 6e 67 24 29 |=P%+LEN(string$)|
00002840 0d 20 31 38 30 30 20 3d 70 61 73 73 0d |. 1800 =pass.|
0000284d 
12-03-88/T\SWR19.m0
12-03-88/T\SWR19.m1
12-03-88/T\SWR19.m2
12-03-88/T\SWR19.m4
12-03-88/T\SWR19.m5
.