Home » CEEFAX disks » telesoftware5.adl » 22-01-88/B\OSB11
22-01-88/B\OSB11
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: | 22-01-88/B\OSB11 |
| Read OK: | ✔ |
| File size: | 0DF1 bytes |
| Load address: | FFFF1900 |
| Exec address: | FFFF8023 |
File contents
10REM OSbits Module B/osb11
20REM Input routine
30REM Decimal only
40REM Version 1.1 25.1.87
50
60*KEY1MODE3|M|NLIST|M
70
80REM : Set routine addresses
90osbyte = &FFF4
100osrdch = &FFE0
110oswrch = &FFEE
120
130DIM code% 120
140
150FOR pass% = 0 TO 3 STEP 3
160P% = code%
170[OPT pass%
180
190.input_character
200
210LDY #0 \ We use Y as a counter along the string
220
230.input_character_loop
240
250JSR osrdch
260BCS input_error \ If C set after OSRDCH then an error
270CMP #13 \ Check for carriage return
280BEQ input_character_exit
290CMP #127 \ Check for delete
300BEQ delete
310CPY buffer_size \ Check that we have room in the buffer
320BEQ buffer_full
330JSR check_character \ See if character is valid
340CMP #0 \ A is null if character is invalid
350BEQ input_character_loop
360JSR oswrch
370STA input_buffer, Y \ Add to the input buffer
380INY
390JMP input_character_loop
400
410.input_character_exit
420
430\ We come here after a carriage return, which terminates the string
440\ The CR is tagged onto the end of the string, we store the string
450\ length and then exit
460
470STA input_buffer, Y
480STY string_length
490CLC \ Clear carry on exit
500RTS
510
520.input_error
530
540\ We come here if an error is detected during OSRDCH. For the moment
550\ we'll just exit the routine and let BASIC report the error
560\ The input buffer may well have characters in it at this point
570\ Note that Carry is set. We can use C to check termination.
580
590RTS
600
610.buffer_full
620
630\ If the buffer is full send a beep and wait for the next character
640\ which could be a carriage return or a delete, so it could be valid
650
660LDA #7
670JSR oswrch
680JMP input_character_loop
690
700.delete
710
720CPY #0 \ Don't delete past start of string
730BEQ input_character_loop
740JSR oswrch
750DEY \ Character deleted so decrease Y
760JMP input_character_loop
770
780.check_character
790
800\ This routine takes a new character in A and checks it against
810\ the valid list. Invalid characters are replaced by a null (0)
820\ in A at the routine's exit
830\ Y is not affected but X is destroyed
840
850LDX #0
860
870.check_loop
880
890PHA
900LDA valid_list, X \ If Xth character is 0 check is finished
910BEQ invalid
920PLA
930CMP valid_list, X \ Compare A with Xth character in valid list
940BEQ valid
950INX
960JMP check_loop
970
980.invalid
990
1000PLA
1010LDA #0 \ If character was invalid replace by 0
1020
1030.valid
1040
1050RTS
1060
1070.valid_list OPT FNEQUS("-0123456789")
1080 OPT FNEQUB(0)
1090.input_buffer OPT FNEQUM(9,255)
1100.buffer_size OPT FNEQUB(8)
1110.string_length OPT FNEQUB(0)
1120
1130]
1140NEXT
1150
1160REPEAT
1170CALLcode%
1180
1190PRINT
1200FOR N%=0 TO ?string_length
1210PRINT CHR$(input_buffer?N%);
1220NEXT
1230PRINT
1240UNTIL FALSE
1250
1260
1270**** EQUate a Byte ****
1280DEF FNEQUB(N%)
1290?P%=N% MOD 256
1300IF (pass% AND 3) = 3 THEN PRINT ~?P%
1310P%=P%+1
1320=pass%
1330
1340**** EQUate a String ****
1350DEF FNEQUS(N$)
1360LOCAL N%
1370WIDTH 40
1380FOR N%=1 TO LEN(N$)
1390K%=ASC(MID$(N$,N%,1))
1400P%?(N%-1)=K%
1410IF (pass% AND 3) = 3 THEN PRINT ~P%?(N%-1);
1420NEXT
1430IF (pass% AND 3) = 3 THEN PRINT
1440P%=P%+LEN(N$)
1450WIDTH 0
1460=pass%
1470
1480**** EQUate a section of Memory ****
1490DEF FNEQUM(number%,byte%)
1500LOCAL N%
1510WIDTH 40
1520FOR N%=0 TO number%-1
1530P%?N%=byte%
1540IF (pass% AND 3) = 3 THEN PRINT ~P%?N%;
1550NEXT
1560IF (pass% AND 3) = 3 THEN PRINT
1570P%=P%+number%
1580WIDTH 0
1590=pass%
� OSbits Module B/osb11
� Input routine
� Decimal only
(� Version 1.1 25.1.87
2
<*KEY1MODE3|M|NLIST|M
F
P � : Set routine addresses
Zosbyte = &FFF4
dosrdch = &FFE0
noswrch = &FFEE
x
�� code% 120
�
�� pass% = 0 � 3 � 3
�P% = code%
�[OPT pass%
�
�.input_character
�
�JLDY #0 \ We use Y as a counter along the string
�
�.input_character_loop
�
�JSR osrdch
FBCS input_error \ If C set after OSRDCH then an error
<CMP #13 \ Check for carriage return
BEQ input_character_exit
"3CMP #127 \ Check for delete
,BEQ delete
6HCPY buffer_size \ Check that we have room in the buffer
@BEQ buffer_full
J<JSR check_character \ See if character is valid
TDCMP #0 \ A is null if character is invalid
^ BEQ input_character_loop
hJSR oswrch
r:STA input_buffer, Y \ Add to the input buffer
|INY
� JMP input_character_loop
�
�.input_character_exit
�
�H\ We come here after a carriage return, which terminates the string
�G\ The CR is tagged onto the end of the string, we store the string
�\ length and then exit
�
�STA input_buffer, Y
�STY string_length
�6CLC \ Clear carry on exit
�RTS
�
.input_error
J\ We come here if an error is detected during OSRDCH. For the moment
&A\ we'll just exit the routine and let BASIC report the error
0D\ The input buffer may well have characters in it at this point
:B\ Note that Carry is set. We can use C to check termination.
D
NRTS
X
b.buffer_full
l
vH\ If the buffer is full send a beep and wait for the next character
�I\ which could be a carriage return or a delete, so it could be valid
�
�
LDA #7
�JSR oswrch
� JMP input_character_loop
�
� .delete
�
�DCPY #0 \ Don't delete past start of string
� BEQ input_character_loop
�JSR oswrch
�BDEY \ Character deleted so decrease Y
� JMP input_character_loop
.check_character
D\ This routine takes a new character in A and checks it against
*E\ the valid list. Invalid characters are replaced by a null (0)
4!\ in A at the routine's exit
>+\ Y is not affected but X is destroyed
H
R
LDX #0
\
f.check_loop
p
zPHA
�JLDA valid_list, X \ If Xth character is 0 check is finished
�BEQ invalid
�PLA
�MCMP valid_list, X \ Compare A with Xth character in valid list
�
BEQ valid
�INX
�JMP check_loop
�
� .invalid
�
�PLA
�HLDA #0 \ If character was invalid replace by 0
�
.valid
RTS
$
.+.valid_list OPT �EQUS("-0123456789")
8 OPT �EQUB(0)
B#.input_buffer OPT �EQUM(9,255)
L .buffer_size OPT �EQUB(8)
V .string_length OPT �EQUB(0)
`
j]
t�
~
��
�
�code%
�
��
�� N%=0 � ?string_length
�� �(input_buffer?N%);
��
��
�� �
�
�
�**** EQUate a Byte ****
� �EQUB(N%)
?P%=N% � 256
� (pass% � 3) = 3 � � ~?P%
P%=P%+1
(
=pass%
2
< **** EQUate a String ****
F� �EQUS(N$)
P� N%
Z� 40
d� N%=1 � �(N$)
nK%=�(�N$,N%,1))
xP%?(N%-1)=K%
�%� (pass% � 3) = 3 � � ~P%?(N%-1);
��
�� (pass% � 3) = 3 � �
�P%=P%+�(N$)
�� 0
�
=pass%
�
�(**** EQUate a section of Memory ****
�� �EQUM(number%,byte%)
�� N%
�� 40
�� N%=0 � number%-1
�P%?N%=byte%
!� (pass% � 3) = 3 � � ~P%?N%;
�
� (pass% � 3) = 3 � �
"P%=P%+number%
,� 0
6
=pass%
� 00000000 0d 00 0a 1b f4 20 4f 53 62 69 74 73 20 4d 6f 64 |..... OSbits Mod|
00000010 75 6c 65 20 42 2f 6f 73 62 31 31 0d 00 14 13 f4 |ule B/osb11.....|
00000020 20 49 6e 70 75 74 20 72 6f 75 74 69 6e 65 0d 00 | Input routine..|
00000030 1e 12 f4 20 44 65 63 69 6d 61 6c 20 6f 6e 6c 79 |... Decimal only|
00000040 0d 00 28 19 f4 20 56 65 72 73 69 6f 6e 20 31 2e |..(.. Version 1.|
00000050 31 20 32 35 2e 31 2e 38 37 0d 00 32 05 20 0d 00 |1 25.1.87..2. ..|
00000060 3c 18 2a 4b 45 59 31 4d 4f 44 45 33 7c 4d 7c 4e |<.*KEY1MODE3|M|N|
00000070 4c 49 53 54 7c 4d 0d 00 46 05 20 0d 00 50 1d f4 |LIST|M..F. ..P..|
00000080 20 3a 20 53 65 74 20 72 6f 75 74 69 6e 65 20 61 | : Set routine a|
00000090 64 64 72 65 73 73 65 73 0d 00 5a 12 6f 73 62 79 |ddresses..Z.osby|
000000a0 74 65 20 3d 20 26 46 46 46 34 0d 00 64 12 6f 73 |te = &FFF4..d.os|
000000b0 72 64 63 68 20 3d 20 26 46 46 45 30 0d 00 6e 12 |rdch = &FFE0..n.|
000000c0 6f 73 77 72 63 68 20 3d 20 26 46 46 45 45 0d 00 |oswrch = &FFEE..|
000000d0 78 05 20 0d 00 82 0f de 20 63 6f 64 65 25 20 31 |x. ..... code% 1|
000000e0 32 30 0d 00 8c 05 20 0d 00 96 17 e3 20 70 61 73 |20.... ..... pas|
000000f0 73 25 20 3d 20 30 20 b8 20 33 20 88 20 33 0d 00 |s% = 0 . 3 . 3..|
00000100 a0 0e 50 25 20 3d 20 63 6f 64 65 25 0d 00 aa 0e |..P% = code%....|
00000110 5b 4f 50 54 20 70 61 73 73 25 0d 00 b4 05 20 0d |[OPT pass%.... .|
00000120 00 be 14 2e 69 6e 70 75 74 5f 63 68 61 72 61 63 |....input_charac|
00000130 74 65 72 0d 00 c8 05 20 0d 00 d2 4a 4c 44 59 20 |ter.... ...JLDY |
00000140 23 30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |#0 |
00000150 20 20 20 20 20 20 20 20 20 20 5c 20 57 65 20 75 | \ We u|
00000160 73 65 20 59 20 61 73 20 61 20 63 6f 75 6e 74 65 |se Y as a counte|
00000170 72 20 61 6c 6f 6e 67 20 74 68 65 20 73 74 72 69 |r along the stri|
00000180 6e 67 0d 00 dc 05 20 0d 00 e6 19 2e 69 6e 70 75 |ng.... .....inpu|
00000190 74 5f 63 68 61 72 61 63 74 65 72 5f 6c 6f 6f 70 |t_character_loop|
000001a0 0d 00 f0 05 20 0d 00 fa 0e 4a 53 52 20 6f 73 72 |.... ....JSR osr|
000001b0 64 63 68 0d 01 04 46 42 43 53 20 69 6e 70 75 74 |dch...FBCS input|
000001c0 5f 65 72 72 6f 72 20 20 20 20 20 20 20 20 20 20 |_error |
000001d0 20 20 20 20 5c 20 49 66 20 43 20 73 65 74 20 61 | \ If C set a|
000001e0 66 74 65 72 20 4f 53 52 44 43 48 20 74 68 65 6e |fter OSRDCH then|
000001f0 20 61 6e 20 65 72 72 6f 72 0d 01 0e 3c 43 4d 50 | an error...<CMP|
00000200 20 23 31 33 20 20 20 20 20 20 20 20 20 20 20 20 | #13 |
00000210 20 20 20 20 20 20 20 20 20 20 5c 20 43 68 65 63 | \ Chec|
00000220 6b 20 66 6f 72 20 63 61 72 72 69 61 67 65 20 72 |k for carriage r|
00000230 65 74 75 72 6e 0d 01 18 1c 42 45 51 20 69 6e 70 |eturn....BEQ inp|
00000240 75 74 5f 63 68 61 72 61 63 74 65 72 5f 65 78 69 |ut_character_exi|
00000250 74 0d 01 22 33 43 4d 50 20 23 31 32 37 20 20 20 |t.."3CMP #127 |
00000260 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000270 20 20 5c 20 43 68 65 63 6b 20 66 6f 72 20 64 65 | \ Check for de|
00000280 6c 65 74 65 0d 01 2c 0e 42 45 51 20 64 65 6c 65 |lete..,.BEQ dele|
00000290 74 65 0d 01 36 48 43 50 59 20 62 75 66 66 65 72 |te..6HCPY buffer|
000002a0 5f 73 69 7a 65 20 20 20 20 20 20 20 20 20 20 20 |_size |
000002b0 20 20 20 5c 20 43 68 65 63 6b 20 74 68 61 74 20 | \ Check that |
000002c0 77 65 20 68 61 76 65 20 72 6f 6f 6d 20 69 6e 20 |we have room in |
000002d0 74 68 65 20 62 75 66 66 65 72 0d 01 40 13 42 45 |the buffer..@.BE|
000002e0 51 20 62 75 66 66 65 72 5f 66 75 6c 6c 0d 01 4a |Q buffer_full..J|
000002f0 3c 4a 53 52 20 63 68 65 63 6b 5f 63 68 61 72 61 |<JSR check_chara|
00000300 63 74 65 72 20 20 20 20 20 20 20 20 20 20 5c 20 |cter \ |
00000310 53 65 65 20 69 66 20 63 68 61 72 61 63 74 65 72 |See if character|
00000320 20 69 73 20 76 61 6c 69 64 0d 01 54 44 43 4d 50 | is valid..TDCMP|
00000330 20 23 30 20 20 20 20 20 20 20 20 20 20 20 20 20 | #0 |
00000340 20 20 20 20 20 20 20 20 20 20 5c 20 41 20 69 73 | \ A is|
00000350 20 6e 75 6c 6c 20 69 66 20 63 68 61 72 61 63 74 | null if charact|
00000360 65 72 20 69 73 20 69 6e 76 61 6c 69 64 0d 01 5e |er is invalid..^|
00000370 1c 42 45 51 20 69 6e 70 75 74 5f 63 68 61 72 61 |.BEQ input_chara|
00000380 63 74 65 72 5f 6c 6f 6f 70 0d 01 68 0e 4a 53 52 |cter_loop..h.JSR|
00000390 20 6f 73 77 72 63 68 0d 01 72 3a 53 54 41 20 69 | oswrch..r:STA i|
000003a0 6e 70 75 74 5f 62 75 66 66 65 72 2c 20 59 20 20 |nput_buffer, Y |
000003b0 20 20 20 20 20 20 20 20 5c 20 41 64 64 20 74 6f | \ Add to|
000003c0 20 74 68 65 20 69 6e 70 75 74 20 62 75 66 66 65 | the input buffe|
000003d0 72 0d 01 7c 07 49 4e 59 0d 01 86 1c 4a 4d 50 20 |r..|.INY....JMP |
000003e0 69 6e 70 75 74 5f 63 68 61 72 61 63 74 65 72 5f |input_character_|
000003f0 6c 6f 6f 70 0d 01 90 05 20 0d 01 9a 19 2e 69 6e |loop.... .....in|
00000400 70 75 74 5f 63 68 61 72 61 63 74 65 72 5f 65 78 |put_character_ex|
00000410 69 74 0d 01 a4 05 20 0d 01 ae 48 5c 20 20 57 65 |it.... ...H\ We|
00000420 20 63 6f 6d 65 20 68 65 72 65 20 61 66 74 65 72 | come here after|
00000430 20 61 20 63 61 72 72 69 61 67 65 20 72 65 74 75 | a carriage retu|
00000440 72 6e 2c 20 77 68 69 63 68 20 74 65 72 6d 69 6e |rn, which termin|
00000450 61 74 65 73 20 74 68 65 20 73 74 72 69 6e 67 0d |ates the string.|
00000460 01 b8 47 5c 20 20 54 68 65 20 43 52 20 69 73 20 |..G\ The CR is |
00000470 74 61 67 67 65 64 20 6f 6e 74 6f 20 74 68 65 20 |tagged onto the |
00000480 65 6e 64 20 6f 66 20 74 68 65 20 73 74 72 69 6e |end of the strin|
00000490 67 2c 20 77 65 20 73 74 6f 72 65 20 74 68 65 20 |g, we store the |
000004a0 73 74 72 69 6e 67 0d 01 c2 1b 5c 20 20 6c 65 6e |string....\ len|
000004b0 67 74 68 20 61 6e 64 20 74 68 65 6e 20 65 78 69 |gth and then exi|
000004c0 74 0d 01 cc 05 20 0d 01 d6 17 53 54 41 20 69 6e |t.... ....STA in|
000004d0 70 75 74 5f 62 75 66 66 65 72 2c 20 59 0d 01 e0 |put_buffer, Y...|
000004e0 15 53 54 59 20 73 74 72 69 6e 67 5f 6c 65 6e 67 |.STY string_leng|
000004f0 74 68 0d 01 ea 36 43 4c 43 20 20 20 20 20 20 20 |th...6CLC |
00000500 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000510 20 20 20 5c 20 43 6c 65 61 72 20 63 61 72 72 79 | \ Clear carry|
00000520 20 6f 6e 20 65 78 69 74 0d 01 f4 07 52 54 53 0d | on exit....RTS.|
00000530 01 fe 05 20 0d 02 08 10 2e 69 6e 70 75 74 5f 65 |... .....input_e|
00000540 72 72 6f 72 0d 02 12 05 20 0d 02 1c 4a 5c 20 20 |rror.... ...J\ |
00000550 57 65 20 63 6f 6d 65 20 68 65 72 65 20 69 66 20 |We come here if |
00000560 61 6e 20 65 72 72 6f 72 20 69 73 20 64 65 74 65 |an error is dete|
00000570 63 74 65 64 20 64 75 72 69 6e 67 20 4f 53 52 44 |cted during OSRD|
00000580 43 48 2e 20 20 46 6f 72 20 74 68 65 20 6d 6f 6d |CH. For the mom|
00000590 65 6e 74 0d 02 26 41 5c 20 20 77 65 27 6c 6c 20 |ent..&A\ we'll |
000005a0 6a 75 73 74 20 65 78 69 74 20 74 68 65 20 72 6f |just exit the ro|
000005b0 75 74 69 6e 65 20 61 6e 64 20 6c 65 74 20 42 41 |utine and let BA|
000005c0 53 49 43 20 72 65 70 6f 72 74 20 74 68 65 20 65 |SIC report the e|
000005d0 72 72 6f 72 0d 02 30 44 5c 20 20 54 68 65 20 69 |rror..0D\ The i|
000005e0 6e 70 75 74 20 62 75 66 66 65 72 20 6d 61 79 20 |nput buffer may |
000005f0 77 65 6c 6c 20 68 61 76 65 20 63 68 61 72 61 63 |well have charac|
00000600 74 65 72 73 20 69 6e 20 69 74 20 61 74 20 74 68 |ters in it at th|
00000610 69 73 20 70 6f 69 6e 74 0d 02 3a 42 5c 20 20 4e |is point..:B\ N|
00000620 6f 74 65 20 74 68 61 74 20 43 61 72 72 79 20 69 |ote that Carry i|
00000630 73 20 73 65 74 2e 20 20 57 65 20 63 61 6e 20 75 |s set. We can u|
00000640 73 65 20 43 20 74 6f 20 63 68 65 63 6b 20 74 65 |se C to check te|
00000650 72 6d 69 6e 61 74 69 6f 6e 2e 0d 02 44 05 20 0d |rmination...D. .|
00000660 02 4e 07 52 54 53 0d 02 58 05 20 0d 02 62 10 2e |.N.RTS..X. ..b..|
00000670 62 75 66 66 65 72 5f 66 75 6c 6c 0d 02 6c 05 20 |buffer_full..l. |
00000680 0d 02 76 48 5c 20 20 49 66 20 74 68 65 20 62 75 |..vH\ If the bu|
00000690 66 66 65 72 20 69 73 20 66 75 6c 6c 20 73 65 6e |ffer is full sen|
000006a0 64 20 61 20 62 65 65 70 20 61 6e 64 20 77 61 69 |d a beep and wai|
000006b0 74 20 66 6f 72 20 74 68 65 20 6e 65 78 74 20 63 |t for the next c|
000006c0 68 61 72 61 63 74 65 72 0d 02 80 49 5c 20 20 77 |haracter...I\ w|
000006d0 68 69 63 68 20 63 6f 75 6c 64 20 62 65 20 61 20 |hich could be a |
000006e0 63 61 72 72 69 61 67 65 20 72 65 74 75 72 6e 20 |carriage return |
000006f0 6f 72 20 61 20 64 65 6c 65 74 65 2c 20 73 6f 20 |or a delete, so |
00000700 69 74 20 63 6f 75 6c 64 20 62 65 20 76 61 6c 69 |it could be vali|
00000710 64 0d 02 8a 05 20 0d 02 94 0a 4c 44 41 20 23 37 |d.... ....LDA #7|
00000720 0d 02 9e 0e 4a 53 52 20 6f 73 77 72 63 68 0d 02 |....JSR oswrch..|
00000730 a8 1c 4a 4d 50 20 69 6e 70 75 74 5f 63 68 61 72 |..JMP input_char|
00000740 61 63 74 65 72 5f 6c 6f 6f 70 0d 02 b2 05 20 0d |acter_loop.... .|
00000750 02 bc 0b 2e 64 65 6c 65 74 65 0d 02 c6 05 20 0d |....delete.... .|
00000760 02 d0 44 43 50 59 20 23 30 20 20 20 20 20 20 20 |..DCPY #0 |
00000770 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000780 5c 20 44 6f 6e 27 74 20 64 65 6c 65 74 65 20 70 |\ Don't delete p|
00000790 61 73 74 20 73 74 61 72 74 20 6f 66 20 73 74 72 |ast start of str|
000007a0 69 6e 67 0d 02 da 1c 42 45 51 20 69 6e 70 75 74 |ing....BEQ input|
000007b0 5f 63 68 61 72 61 63 74 65 72 5f 6c 6f 6f 70 0d |_character_loop.|
000007c0 02 e4 0e 4a 53 52 20 6f 73 77 72 63 68 0d 02 ee |...JSR oswrch...|
000007d0 42 44 45 59 20 20 20 20 20 20 20 20 20 20 20 20 |BDEY |
000007e0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 5c 20 | \ |
000007f0 43 68 61 72 61 63 74 65 72 20 64 65 6c 65 74 65 |Character delete|
00000800 64 20 73 6f 20 64 65 63 72 65 61 73 65 20 59 0d |d so decrease Y.|
00000810 02 f8 1c 4a 4d 50 20 69 6e 70 75 74 5f 63 68 61 |...JMP input_cha|
00000820 72 61 63 74 65 72 5f 6c 6f 6f 70 0d 03 02 05 20 |racter_loop.... |
00000830 0d 03 0c 14 2e 63 68 65 63 6b 5f 63 68 61 72 61 |.....check_chara|
00000840 63 74 65 72 0d 03 16 05 20 0d 03 20 44 5c 20 20 |cter.... .. D\ |
00000850 54 68 69 73 20 72 6f 75 74 69 6e 65 20 74 61 6b |This routine tak|
00000860 65 73 20 61 20 6e 65 77 20 63 68 61 72 61 63 74 |es a new charact|
00000870 65 72 20 69 6e 20 41 20 61 6e 64 20 63 68 65 63 |er in A and chec|
00000880 6b 73 20 69 74 20 61 67 61 69 6e 73 74 0d 03 2a |ks it against..*|
00000890 45 5c 20 20 74 68 65 20 76 61 6c 69 64 20 6c 69 |E\ the valid li|
000008a0 73 74 2e 20 20 49 6e 76 61 6c 69 64 20 63 68 61 |st. Invalid cha|
000008b0 72 61 63 74 65 72 73 20 61 72 65 20 72 65 70 6c |racters are repl|
000008c0 61 63 65 64 20 62 79 20 61 20 6e 75 6c 6c 20 28 |aced by a null (|
000008d0 30 29 0d 03 34 21 5c 20 20 69 6e 20 41 20 61 74 |0)..4!\ in A at|
000008e0 20 74 68 65 20 72 6f 75 74 69 6e 65 27 73 20 65 | the routine's e|
000008f0 78 69 74 0d 03 3e 2b 5c 20 20 59 20 69 73 20 6e |xit..>+\ Y is n|
00000900 6f 74 20 61 66 66 65 63 74 65 64 20 62 75 74 20 |ot affected but |
00000910 58 20 69 73 20 64 65 73 74 72 6f 79 65 64 0d 03 |X is destroyed..|
00000920 48 05 20 0d 03 52 0a 4c 44 58 20 23 30 0d 03 5c |H. ..R.LDX #0..\|
00000930 05 20 0d 03 66 0f 2e 63 68 65 63 6b 5f 6c 6f 6f |. ..f..check_loo|
00000940 70 0d 03 70 05 20 0d 03 7a 07 50 48 41 0d 03 84 |p..p. ..z.PHA...|
00000950 4a 4c 44 41 20 76 61 6c 69 64 5f 6c 69 73 74 2c |JLDA valid_list,|
00000960 20 58 20 20 20 20 20 20 20 20 20 20 20 20 5c 20 | X \ |
00000970 49 66 20 58 74 68 20 63 68 61 72 61 63 74 65 72 |If Xth character|
00000980 20 69 73 20 30 20 63 68 65 63 6b 20 69 73 20 66 | is 0 check is f|
00000990 69 6e 69 73 68 65 64 0d 03 8e 0f 42 45 51 20 69 |inished....BEQ i|
000009a0 6e 76 61 6c 69 64 0d 03 98 07 50 4c 41 0d 03 a2 |nvalid....PLA...|
000009b0 4d 43 4d 50 20 76 61 6c 69 64 5f 6c 69 73 74 2c |MCMP valid_list,|
000009c0 20 58 20 20 20 20 20 20 20 20 20 20 20 20 5c 20 | X \ |
000009d0 43 6f 6d 70 61 72 65 20 41 20 77 69 74 68 20 58 |Compare A with X|
000009e0 74 68 20 63 68 61 72 61 63 74 65 72 20 69 6e 20 |th character in |
000009f0 76 61 6c 69 64 20 6c 69 73 74 0d 03 ac 0d 42 45 |valid list....BE|
00000a00 51 20 76 61 6c 69 64 0d 03 b6 07 49 4e 58 0d 03 |Q valid....INX..|
00000a10 c0 12 4a 4d 50 20 63 68 65 63 6b 5f 6c 6f 6f 70 |..JMP check_loop|
00000a20 0d 03 ca 05 20 0d 03 d4 0c 2e 69 6e 76 61 6c 69 |.... .....invali|
00000a30 64 0d 03 de 05 20 0d 03 e8 07 50 4c 41 0d 03 f2 |d.... ....PLA...|
00000a40 48 4c 44 41 20 23 30 20 20 20 20 20 20 20 20 20 |HLDA #0 |
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00000df0 ff |.|
00000df1 
22-01-88/B\OSB11.m0
22-01-88/B\OSB11.m1
22-01-88/B\OSB11.m2
22-01-88/B\OSB11.m4
22-01-88/B\OSB11.m5
.