L/Babb1

Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_22.ADF » L/Babb1

L/Babb1

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 » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_22.ADF
Filename:	L/Babb1
Read OK:	✔
File size:	124E bytes
Load address:	3A204556
Exec address:	2E4C2E30

File contents

								Gareth Babb
								30 Park Drive
								Grimsby
								South Humberside
								DN32 OEG

					Tel: (01472) 878002
					Email: gbabb@hick.feline.conqueror.co.uk

								21.08.95

Dear Gus,

Two issues worth - I forgot I had wrote this, and thus forgot to actually
post it to you last month !

--- John Crane

*BYE closes any open (ADFS) files and parks any Hard Drive heads, whereas
*CLOSE just closes any open files.

--- You

Why not get someone to write a 64k compatible screen loader - you could
even compress the screens at the same time :-)

I usually find the best thing to clean contacts with is a soft rubber.

You forgot the codes which don't change for phONEday, basically all non-
geographic codes (eg. 0800, 0891, 0645 etc.) remain the same, except for
most pager numbers (the oddity is Hutchinson Display Paging which remains
on 0941- 1). Oh yeah, and the change from 010 to 00 for international
access.

Boo ! Down with Anderson Country/Afternoon Shift, get it off, get it off.

--- Derek Walker

Small bit of code to completely compact:

DIM data &100
FOR N=4 TO 7 STEP 3
P%=&C00:O%=data
[OPT N
LDA #218:LDX #0:LDY #0:JSR &FFF4
LDA #3:LDX #20:JSR &FFF4
LDA #23:JSR &FFCB:LDA #1:JSR &FFCB
LDA #0:LDY #8:.curs:JSR &FFCB:DEY:BNE curs
LDA #3:JSR &FFF4

.loop
LDA #0
STA &1D00
STA &1D01:LDA #&20:STA &1D02
LDA #130:JSR &FFF4:STX &1D03:STY &1D04

LDA #8:STA &1D05
LDA #0:STA &1D06:STA &1D07:STA &1D08:STA &1D09:STA &1D0A

STA &1D0B:STA &1D0D:STA &1D0E
LDA #2:STA &1D0C

LDX #0:LDY #&1D:LDA #&72:JSR &FFF1
LDA &1D00:BEQ okay
BRK:BRK:EQUS "Bugger":BRK

.okay
BIT &FF:BMI end_it

LDA &21FE:CMP #3:BNE compact_it

.end_it
LDX #map MOD 256:LDY #map DIV 256:JSR &FFF7

LDA #218:LDX #0:LDY #0:JSR &FFF4
LDA #3:LDX #20:JSR &FFF4
LDA #23:JSR &FFCB
LDA #1:JSR &FFCB:JSR &FFCB
LDA #0:LDY #7:.curs2:JSR &FFCB:DEY:BNE curs2
LDA #3:JMP &FFF4

.compact_it
LDX #map MOD 256:LDY #map DIV 256:JSR &FFF7
LDX #compact MOD 256:LDY #compact DIV 256:JSR &FFF7
JMP loop

.map:EQUS "Map":EQUB 13
.compact:EQUS "Compact 1D 63":EQUB 13
]
NEXT
OSCLI "Save EFC "+STR$~data+" "+STR$~O%+" C00 C00"


Erm, ADFS doesn't use NMIs - though it does claim NMI workspace - or IRQs
for ANYTHING. For both floppy and HD it polls (which is why for Floppy it
will disable IRQs and change screen mode - disabling the palette at the
same time - otherwise the 177x will flag overruns). The normal ST506/SASI
HD interface will wait for the computer to take data as fast as it can,
which is why ADFS doesn't have to change screen mode, or bother with
disabling IRQs.

On the beeb, NMIs are only used for Floppy, and even then all code is run
from &D00, the place specifically reserved for NMI code. A loop in (A)DFS
itself just keeps check on a flag byte, which the NMI routine updates to
flag when data transfer from the 177x has finished.

I presume Acron didn't use NMIs on the Elk due to the problems with
claiming and releasing memory from the ULA - on the Plus 3, bit 4 of the
ctrl reg is connected straight to the NMI line, except that it isn't
because Link 1 is not made by default, so a NMI can be forced. ADI from
Pres requires the enabling of this Link on the Plus 3, as that does use
NMIs (I presume mainly to keep the mode 0 display - though it does break
up a bit as the ULA is forced to release memory in the middle of screen
refreshes).

--- You

Re Internet. 386 and a Fax Modem ? No neddy, you can get away with
anything you want for normal email access, I use a 286 for email (about
the only thing I use it for). Even KA9Q (a well known PD TCPIP program)
will run happily on a 286 to give you telnet, ftp, email etc. It's only
when you start going for WWW (over rated) and need the graphics that
Windows (and thus processing power needed) come into play.

Alternatively get a descent computer, I do believe a company called Acorn
produce some ...

Look out for local BBs' which will provide email/newsgroup access for
nothing/small fee. Otherwise full internet operators (ie. provide direct
access to things like WWW, telnet, ftp ...) are providing quite extensive
local coverage now-a-days. Enc. pile of text files.

--- Gerry Emson

What you have there is a standard PC serial mouse. No good for the Elk
unless you find a serial port and write your own software - no existing
software will support it. Sell it and hunt out an old user port (eg. AMX)
mouse.

I've run an Elk from a 12v power supply no probs, a car battery shouldn't
be much different. This was going through the normal power circuity stage
- it copes, so no need to produce -5v yourself (what use is that anyway, I
think it just goes to the edge connector).


			Yours sincerely,

				Gareth Babb

I LIKED ANDERSON COUNTRY.

00000000  09 09 09 09 09 09 09 09  47 61 72 65 74 68 20 42  |........Gareth B|
00000010  61 62 62 0d 09 09 09 09  09 09 09 09 33 30 20 50  |abb.........30 P|
00000020  61 72 6b 20 44 72 69 76  65 0d 09 09 09 09 09 09  |ark Drive.......|
00000030  09 09 47 72 69 6d 73 62  79 0d 09 09 09 09 09 09  |..Grimsby.......|
00000040  09 09 53 6f 75 74 68 20  48 75 6d 62 65 72 73 69  |..South Humbersi|
00000050  64 65 0d 09 09 09 09 09  09 09 09 44 4e 33 32 20  |de.........DN32 |
00000060  4f 45 47 0d 0d 09 09 09  09 09 54 65 6c 3a 20 28  |OEG.......Tel: (|
00000070  30 31 34 37 32 29 20 38  37 38 30 30 32 0d 09 09  |01472) 878002...|
00000080  09 09 09 45 6d 61 69 6c  3a 20 67 62 61 62 62 40  |...Email: gbabb@|
00000090  68 69 63 6b 2e 66 65 6c  69 6e 65 2e 63 6f 6e 71  |hick.feline.conq|
000000a0  75 65 72 6f 72 2e 63 6f  2e 75 6b 0d 0d 09 09 09  |ueror.co.uk.....|
000000b0  09 09 09 09 09 32 31 2e  30 38 2e 39 35 0d 0d 44  |.....21.08.95..D|
000000c0  65 61 72 20 47 75 73 2c  0d 0d 54 77 6f 20 69 73  |ear Gus,..Two is|
000000d0  73 75 65 73 20 77 6f 72  74 68 20 2d 20 49 20 66  |sues worth - I f|
000000e0  6f 72 67 6f 74 20 49 20  68 61 64 20 77 72 6f 74  |orgot I had wrot|
000000f0  65 20 74 68 69 73 2c 20  61 6e 64 20 74 68 75 73  |e this, and thus|
00000100  20 66 6f 72 67 6f 74 20  74 6f 20 61 63 74 75 61  | forgot to actua|
00000110  6c 6c 79 0d 70 6f 73 74  20 69 74 20 74 6f 20 79  |lly.post it to y|
00000120  6f 75 20 6c 61 73 74 20  6d 6f 6e 74 68 20 21 0d  |ou last month !.|
00000130  0d 2d 2d 2d 20 4a 6f 68  6e 20 43 72 61 6e 65 0d  |.--- John Crane.|
00000140  0d 2a 42 59 45 20 63 6c  6f 73 65 73 20 61 6e 79  |.*BYE closes any|
00000150  20 6f 70 65 6e 20 28 41  44 46 53 29 20 66 69 6c  | open (ADFS) fil|
00000160  65 73 20 61 6e 64 20 70  61 72 6b 73 20 61 6e 79  |es and parks any|
00000170  20 48 61 72 64 20 44 72  69 76 65 20 68 65 61 64  | Hard Drive head|
00000180  73 2c 20 77 68 65 72 65  61 73 0d 2a 43 4c 4f 53  |s, whereas.*CLOS|
00000190  45 20 6a 75 73 74 20 63  6c 6f 73 65 73 20 61 6e  |E just closes an|
000001a0  79 20 6f 70 65 6e 20 66  69 6c 65 73 2e 0d 0d 2d  |y open files...-|
000001b0  2d 2d 20 59 6f 75 0d 0d  57 68 79 20 6e 6f 74 20  |-- You..Why not |
000001c0  67 65 74 20 73 6f 6d 65  6f 6e 65 20 74 6f 20 77  |get someone to w|
000001d0  72 69 74 65 20 61 20 36  34 6b 20 63 6f 6d 70 61  |rite a 64k compa|
000001e0  74 69 62 6c 65 20 73 63  72 65 65 6e 20 6c 6f 61  |tible screen loa|
000001f0  64 65 72 20 2d 20 79 6f  75 20 63 6f 75 6c 64 0d  |der - you could.|
00000200  65 76 65 6e 20 63 6f 6d  70 72 65 73 73 20 74 68  |even compress th|
00000210  65 20 73 63 72 65 65 6e  73 20 61 74 20 74 68 65  |e screens at the|
00000220  20 73 61 6d 65 20 74 69  6d 65 20 3a 2d 29 0d 0d  | same time :-)..|
00000230  49 20 75 73 75 61 6c 6c  79 20 66 69 6e 64 20 74  |I usually find t|
00000240  68 65 20 62 65 73 74 20  74 68 69 6e 67 20 74 6f  |he best thing to|
00000250  20 63 6c 65 61 6e 20 63  6f 6e 74 61 63 74 73 20  | clean contacts |
00000260  77 69 74 68 20 69 73 20  61 20 73 6f 66 74 20 72  |with is a soft r|
00000270  75 62 62 65 72 2e 0d 0d  59 6f 75 20 66 6f 72 67  |ubber...You forg|
00000280  6f 74 20 74 68 65 20 63  6f 64 65 73 20 77 68 69  |ot the codes whi|
00000290  63 68 20 64 6f 6e 27 74  20 63 68 61 6e 67 65 20  |ch don't change |
000002a0  66 6f 72 20 70 68 4f 4e  45 64 61 79 2c 20 62 61  |for phONEday, ba|
000002b0  73 69 63 61 6c 6c 79 20  61 6c 6c 20 6e 6f 6e 2d  |sically all non-|
000002c0  0d 67 65 6f 67 72 61 70  68 69 63 20 63 6f 64 65  |.geographic code|
000002d0  73 20 28 65 67 2e 20 30  38 30 30 2c 20 30 38 39  |s (eg. 0800, 089|
000002e0  31 2c 20 30 36 34 35 20  65 74 63 2e 29 20 72 65  |1, 0645 etc.) re|
000002f0  6d 61 69 6e 20 74 68 65  20 73 61 6d 65 2c 20 65  |main the same, e|
00000300  78 63 65 70 74 20 66 6f  72 0d 6d 6f 73 74 20 70  |xcept for.most p|
00000310  61 67 65 72 20 6e 75 6d  62 65 72 73 20 28 74 68  |ager numbers (th|
00000320  65 20 6f 64 64 69 74 79  20 69 73 20 48 75 74 63  |e oddity is Hutc|
00000330  68 69 6e 73 6f 6e 20 44  69 73 70 6c 61 79 20 50  |hinson Display P|
00000340  61 67 69 6e 67 20 77 68  69 63 68 20 72 65 6d 61  |aging which rema|
00000350  69 6e 73 0d 6f 6e 20 30  39 34 31 2d 20 31 29 2e  |ins.on 0941- 1).|
00000360  20 4f 68 20 79 65 61 68  2c 20 61 6e 64 20 74 68  | Oh yeah, and th|
00000370  65 20 63 68 61 6e 67 65  20 66 72 6f 6d 20 30 31  |e change from 01|
00000380  30 20 74 6f 20 30 30 20  66 6f 72 20 69 6e 74 65  |0 to 00 for inte|
00000390  72 6e 61 74 69 6f 6e 61  6c 0d 61 63 63 65 73 73  |rnational.access|
000003a0  2e 0d 0d 42 6f 6f 20 21  20 44 6f 77 6e 20 77 69  |...Boo ! Down wi|
000003b0  74 68 20 41 6e 64 65 72  73 6f 6e 20 43 6f 75 6e  |th Anderson Coun|
000003c0  74 72 79 2f 41 66 74 65  72 6e 6f 6f 6e 20 53 68  |try/Afternoon Sh|
000003d0  69 66 74 2c 20 67 65 74  20 69 74 20 6f 66 66 2c  |ift, get it off,|
000003e0  20 67 65 74 20 69 74 20  6f 66 66 2e 0d 0d 2d 2d  | get it off...--|
000003f0  2d 20 44 65 72 65 6b 20  57 61 6c 6b 65 72 0d 0d  |- Derek Walker..|
00000400  53 6d 61 6c 6c 20 62 69  74 20 6f 66 20 63 6f 64  |Small bit of cod|
00000410  65 20 74 6f 20 63 6f 6d  70 6c 65 74 65 6c 79 20  |e to completely |
00000420  63 6f 6d 70 61 63 74 3a  0d 0d 44 49 4d 20 64 61  |compact:..DIM da|
00000430  74 61 20 26 31 30 30 0d  46 4f 52 20 4e 3d 34 20  |ta &100.FOR N=4 |
00000440  54 4f 20 37 20 53 54 45  50 20 33 0d 50 25 3d 26  |TO 7 STEP 3.P%=&|
00000450  43 30 30 3a 4f 25 3d 64  61 74 61 0d 5b 4f 50 54  |C00:O%=data.[OPT|
00000460  20 4e 0d 4c 44 41 20 23  32 31 38 3a 4c 44 58 20  | N.LDA #218:LDX |
00000470  23 30 3a 4c 44 59 20 23  30 3a 4a 53 52 20 26 46  |#0:LDY #0:JSR &F|
00000480  46 46 34 0d 4c 44 41 20  23 33 3a 4c 44 58 20 23  |FF4.LDA #3:LDX #|
00000490  32 30 3a 4a 53 52 20 26  46 46 46 34 0d 4c 44 41  |20:JSR &FFF4.LDA|
000004a0  20 23 32 33 3a 4a 53 52  20 26 46 46 43 42 3a 4c  | #23:JSR &FFCB:L|
000004b0  44 41 20 23 31 3a 4a 53  52 20 26 46 46 43 42 0d  |DA #1:JSR &FFCB.|
000004c0  4c 44 41 20 23 30 3a 4c  44 59 20 23 38 3a 2e 63  |LDA #0:LDY #8:.c|
000004d0  75 72 73 3a 4a 53 52 20  26 46 46 43 42 3a 44 45  |urs:JSR &FFCB:DE|
000004e0  59 3a 42 4e 45 20 63 75  72 73 0d 4c 44 41 20 23  |Y:BNE curs.LDA #|
000004f0  33 3a 4a 53 52 20 26 46  46 46 34 0d 0d 2e 6c 6f  |3:JSR &FFF4...lo|
00000500  6f 70 0d 4c 44 41 20 23  30 0d 53 54 41 20 26 31  |op.LDA #0.STA &1|
00000510  44 30 30 0d 53 54 41 20  26 31 44 30 31 3a 4c 44  |D00.STA &1D01:LD|
00000520  41 20 23 26 32 30 3a 53  54 41 20 26 31 44 30 32  |A #&20:STA &1D02|
00000530  0d 4c 44 41 20 23 31 33  30 3a 4a 53 52 20 26 46  |.LDA #130:JSR &F|
00000540  46 46 34 3a 53 54 58 20  26 31 44 30 33 3a 53 54  |FF4:STX &1D03:ST|
00000550  59 20 26 31 44 30 34 0d  0d 4c 44 41 20 23 38 3a  |Y &1D04..LDA #8:|
00000560  53 54 41 20 26 31 44 30  35 0d 4c 44 41 20 23 30  |STA &1D05.LDA #0|
00000570  3a 53 54 41 20 26 31 44  30 36 3a 53 54 41 20 26  |:STA &1D06:STA &|
00000580  31 44 30 37 3a 53 54 41  20 26 31 44 30 38 3a 53  |1D07:STA &1D08:S|
00000590  54 41 20 26 31 44 30 39  3a 53 54 41 20 26 31 44  |TA &1D09:STA &1D|
000005a0  30 41 0d 0d 53 54 41 20  26 31 44 30 42 3a 53 54  |0A..STA &1D0B:ST|
000005b0  41 20 26 31 44 30 44 3a  53 54 41 20 26 31 44 30  |A &1D0D:STA &1D0|
000005c0  45 0d 4c 44 41 20 23 32  3a 53 54 41 20 26 31 44  |E.LDA #2:STA &1D|
000005d0  30 43 0d 0d 4c 44 58 20  23 30 3a 4c 44 59 20 23  |0C..LDX #0:LDY #|
000005e0  26 31 44 3a 4c 44 41 20  23 26 37 32 3a 4a 53 52  |&1D:LDA #&72:JSR|
000005f0  20 26 46 46 46 31 0d 4c  44 41 20 26 31 44 30 30  | &FFF1.LDA &1D00|
00000600  3a 42 45 51 20 6f 6b 61  79 0d 42 52 4b 3a 42 52  |:BEQ okay.BRK:BR|
00000610  4b 3a 45 51 55 53 20 22  42 75 67 67 65 72 22 3a  |K:EQUS "Bugger":|
00000620  42 52 4b 0d 0d 2e 6f 6b  61 79 0d 42 49 54 20 26  |BRK...okay.BIT &|
00000630  46 46 3a 42 4d 49 20 65  6e 64 5f 69 74 0d 0d 4c  |FF:BMI end_it..L|
00000640  44 41 20 26 32 31 46 45  3a 43 4d 50 20 23 33 3a  |DA &21FE:CMP #3:|
00000650  42 4e 45 20 63 6f 6d 70  61 63 74 5f 69 74 0d 0d  |BNE compact_it..|
00000660  2e 65 6e 64 5f 69 74 0d  4c 44 58 20 23 6d 61 70  |.end_it.LDX #map|
00000670  20 4d 4f 44 20 32 35 36  3a 4c 44 59 20 23 6d 61  | MOD 256:LDY #ma|
00000680  70 20 44 49 56 20 32 35  36 3a 4a 53 52 20 26 46  |p DIV 256:JSR &F|
00000690  46 46 37 0d 0d 4c 44 41  20 23 32 31 38 3a 4c 44  |FF7..LDA #218:LD|
000006a0  58 20 23 30 3a 4c 44 59  20 23 30 3a 4a 53 52 20  |X #0:LDY #0:JSR |
000006b0  26 46 46 46 34 0d 4c 44  41 20 23 33 3a 4c 44 58  |&FFF4.LDA #3:LDX|
000006c0  20 23 32 30 3a 4a 53 52  20 26 46 46 46 34 0d 4c  | #20:JSR &FFF4.L|
000006d0  44 41 20 23 32 33 3a 4a  53 52 20 26 46 46 43 42  |DA #23:JSR &FFCB|
000006e0  0d 4c 44 41 20 23 31 3a  4a 53 52 20 26 46 46 43  |.LDA #1:JSR &FFC|
000006f0  42 3a 4a 53 52 20 26 46  46 43 42 0d 4c 44 41 20  |B:JSR &FFCB.LDA |
00000700  23 30 3a 4c 44 59 20 23  37 3a 2e 63 75 72 73 32  |#0:LDY #7:.curs2|
00000710  3a 4a 53 52 20 26 46 46  43 42 3a 44 45 59 3a 42  |:JSR &FFCB:DEY:B|
00000720  4e 45 20 63 75 72 73 32  0d 4c 44 41 20 23 33 3a  |NE curs2.LDA #3:|
00000730  4a 4d 50 20 26 46 46 46  34 0d 0d 2e 63 6f 6d 70  |JMP &FFF4...comp|
00000740  61 63 74 5f 69 74 0d 4c  44 58 20 23 6d 61 70 20  |act_it.LDX #map |
00000750  4d 4f 44 20 32 35 36 3a  4c 44 59 20 23 6d 61 70  |MOD 256:LDY #map|
00000760  20 44 49 56 20 32 35 36  3a 4a 53 52 20 26 46 46  | DIV 256:JSR &FF|
00000770  46 37 0d 4c 44 58 20 23  63 6f 6d 70 61 63 74 20  |F7.LDX #compact |
00000780  4d 4f 44 20 32 35 36 3a  4c 44 59 20 23 63 6f 6d  |MOD 256:LDY #com|
00000790  70 61 63 74 20 44 49 56  20 32 35 36 3a 4a 53 52  |pact DIV 256:JSR|
000007a0  20 26 46 46 46 37 0d 4a  4d 50 20 6c 6f 6f 70 0d  | &FFF7.JMP loop.|
000007b0  0d 2e 6d 61 70 3a 45 51  55 53 20 22 4d 61 70 22  |..map:EQUS "Map"|
000007c0  3a 45 51 55 42 20 31 33  0d 2e 63 6f 6d 70 61 63  |:EQUB 13..compac|
000007d0  74 3a 45 51 55 53 20 22  43 6f 6d 70 61 63 74 20  |t:EQUS "Compact |
000007e0  31 44 20 36 33 22 3a 45  51 55 42 20 31 33 0d 5d  |1D 63":EQUB 13.]|
000007f0  0d 4e 45 58 54 0d 4f 53  43 4c 49 20 22 53 61 76  |.NEXT.OSCLI "Sav|
00000800  65 20 45 46 43 20 22 2b  53 54 52 24 7e 64 61 74  |e EFC "+STR$~dat|
00000810  61 2b 22 20 22 2b 53 54  52 24 7e 4f 25 2b 22 20  |a+" "+STR$~O%+" |
00000820  43 30 30 20 43 30 30 22  0d 0d 0d 45 72 6d 2c 20  |C00 C00"...Erm, |
00000830  41 44 46 53 20 64 6f 65  73 6e 27 74 20 75 73 65  |ADFS doesn't use|
00000840  20 4e 4d 49 73 20 2d 20  74 68 6f 75 67 68 20 69  | NMIs - though i|
00000850  74 20 64 6f 65 73 20 63  6c 61 69 6d 20 4e 4d 49  |t does claim NMI|
00000860  20 77 6f 72 6b 73 70 61  63 65 20 2d 20 6f 72 20  | workspace - or |
00000870  49 52 51 73 0d 66 6f 72  20 41 4e 59 54 48 49 4e  |IRQs.for ANYTHIN|
00000880  47 2e 20 46 6f 72 20 62  6f 74 68 20 66 6c 6f 70  |G. For both flop|
00000890  70 79 20 61 6e 64 20 48  44 20 69 74 20 70 6f 6c  |py and HD it pol|
000008a0  6c 73 20 28 77 68 69 63  68 20 69 73 20 77 68 79  |ls (which is why|
000008b0  20 66 6f 72 20 46 6c 6f  70 70 79 20 69 74 0d 77  | for Floppy it.w|
000008c0  69 6c 6c 20 64 69 73 61  62 6c 65 20 49 52 51 73  |ill disable IRQs|
000008d0  20 61 6e 64 20 63 68 61  6e 67 65 20 73 63 72 65  | and change scre|
000008e0  65 6e 20 6d 6f 64 65 20  2d 20 64 69 73 61 62 6c  |en mode - disabl|
000008f0  69 6e 67 20 74 68 65 20  70 61 6c 65 74 74 65 20  |ing the palette |
00000900  61 74 20 74 68 65 0d 73  61 6d 65 20 74 69 6d 65  |at the.same time|
00000910  20 2d 20 6f 74 68 65 72  77 69 73 65 20 74 68 65  | - otherwise the|
00000920  20 31 37 37 78 20 77 69  6c 6c 20 66 6c 61 67 20  | 177x will flag |
00000930  6f 76 65 72 72 75 6e 73  29 2e 20 54 68 65 20 6e  |overruns). The n|
00000940  6f 72 6d 61 6c 20 53 54  35 30 36 2f 53 41 53 49  |ormal ST506/SASI|
00000950  0d 48 44 20 69 6e 74 65  72 66 61 63 65 20 77 69  |.HD interface wi|
00000960  6c 6c 20 77 61 69 74 20  66 6f 72 20 74 68 65 20  |ll wait for the |
00000970  63 6f 6d 70 75 74 65 72  20 74 6f 20 74 61 6b 65  |computer to take|
00000980  20 64 61 74 61 20 61 73  20 66 61 73 74 20 61 73  | data as fast as|
00000990  20 69 74 20 63 61 6e 2c  0d 77 68 69 63 68 20 69  | it can,.which i|
000009a0  73 20 77 68 79 20 41 44  46 53 20 64 6f 65 73 6e  |s why ADFS doesn|
000009b0  27 74 20 68 61 76 65 20  74 6f 20 63 68 61 6e 67  |'t have to chang|
000009c0  65 20 73 63 72 65 65 6e  20 6d 6f 64 65 2c 20 6f  |e screen mode, o|
000009d0  72 20 62 6f 74 68 65 72  20 77 69 74 68 0d 64 69  |r bother with.di|
000009e0  73 61 62 6c 69 6e 67 20  49 52 51 73 2e 0d 0d 4f  |sabling IRQs...O|
000009f0  6e 20 74 68 65 20 62 65  65 62 2c 20 4e 4d 49 73  |n the beeb, NMIs|
00000a00  20 61 72 65 20 6f 6e 6c  79 20 75 73 65 64 20 66  | are only used f|
00000a10  6f 72 20 46 6c 6f 70 70  79 2c 20 61 6e 64 20 65  |or Floppy, and e|
00000a20  76 65 6e 20 74 68 65 6e  20 61 6c 6c 20 63 6f 64  |ven then all cod|
00000a30  65 20 69 73 20 72 75 6e  0d 66 72 6f 6d 20 26 44  |e is run.from &D|
00000a40  30 30 2c 20 74 68 65 20  70 6c 61 63 65 20 73 70  |00, the place sp|
00000a50  65 63 69 66 69 63 61 6c  6c 79 20 72 65 73 65 72  |ecifically reser|
00000a60  76 65 64 20 66 6f 72 20  4e 4d 49 20 63 6f 64 65  |ved for NMI code|
00000a70  2e 20 41 20 6c 6f 6f 70  20 69 6e 20 28 41 29 44  |. A loop in (A)D|
00000a80  46 53 0d 69 74 73 65 6c  66 20 6a 75 73 74 20 6b  |FS.itself just k|
00000a90  65 65 70 73 20 63 68 65  63 6b 20 6f 6e 20 61 20  |eeps check on a |
00000aa0  66 6c 61 67 20 62 79 74  65 2c 20 77 68 69 63 68  |flag byte, which|
00000ab0  20 74 68 65 20 4e 4d 49  20 72 6f 75 74 69 6e 65  | the NMI routine|
00000ac0  20 75 70 64 61 74 65 73  20 74 6f 0d 66 6c 61 67  | updates to.flag|
00000ad0  20 77 68 65 6e 20 64 61  74 61 20 74 72 61 6e 73  | when data trans|
00000ae0  66 65 72 20 66 72 6f 6d  20 74 68 65 20 31 37 37  |fer from the 177|
00000af0  78 20 68 61 73 20 66 69  6e 69 73 68 65 64 2e 0d  |x has finished..|
00000b00  0d 49 20 70 72 65 73 75  6d 65 20 41 63 72 6f 6e  |.I presume Acron|
00000b10  20 64 69 64 6e 27 74 20  75 73 65 20 4e 4d 49 73  | didn't use NMIs|
00000b20  20 6f 6e 20 74 68 65 20  45 6c 6b 20 64 75 65 20  | on the Elk due |
00000b30  74 6f 20 74 68 65 20 70  72 6f 62 6c 65 6d 73 20  |to the problems |
00000b40  77 69 74 68 0d 63 6c 61  69 6d 69 6e 67 20 61 6e  |with.claiming an|
00000b50  64 20 72 65 6c 65 61 73  69 6e 67 20 6d 65 6d 6f  |d releasing memo|
00000b60  72 79 20 66 72 6f 6d 20  74 68 65 20 55 4c 41 20  |ry from the ULA |
00000b70  2d 20 6f 6e 20 74 68 65  20 50 6c 75 73 20 33 2c  |- on the Plus 3,|
00000b80  20 62 69 74 20 34 20 6f  66 20 74 68 65 0d 63 74  | bit 4 of the.ct|
00000b90  72 6c 20 72 65 67 20 69  73 20 63 6f 6e 6e 65 63  |rl reg is connec|
00000ba0  74 65 64 20 73 74 72 61  69 67 68 74 20 74 6f 20  |ted straight to |
00000bb0  74 68 65 20 4e 4d 49 20  6c 69 6e 65 2c 20 65 78  |the NMI line, ex|
00000bc0  63 65 70 74 20 74 68 61  74 20 69 74 20 69 73 6e  |cept that it isn|
00000bd0  27 74 0d 62 65 63 61 75  73 65 20 4c 69 6e 6b 20  |'t.because Link |
00000be0  31 20 69 73 20 6e 6f 74  20 6d 61 64 65 20 62 79  |1 is not made by|
00000bf0  20 64 65 66 61 75 6c 74  2c 20 73 6f 20 61 20 4e  | default, so a N|
00000c00  4d 49 20 63 61 6e 20 62  65 20 66 6f 72 63 65 64  |MI can be forced|
00000c10  2e 20 41 44 49 20 66 72  6f 6d 0d 50 72 65 73 20  |. ADI from.Pres |
00000c20  72 65 71 75 69 72 65 73  20 74 68 65 20 65 6e 61  |requires the ena|
00000c30  62 6c 69 6e 67 20 6f 66  20 74 68 69 73 20 4c 69  |bling of this Li|
00000c40  6e 6b 20 6f 6e 20 74 68  65 20 50 6c 75 73 20 33  |nk on the Plus 3|
00000c50  2c 20 61 73 20 74 68 61  74 20 64 6f 65 73 20 75  |, as that does u|
00000c60  73 65 0d 4e 4d 49 73 20  28 49 20 70 72 65 73 75  |se.NMIs (I presu|
00000c70  6d 65 20 6d 61 69 6e 6c  79 20 74 6f 20 6b 65 65  |me mainly to kee|
00000c80  70 20 74 68 65 20 6d 6f  64 65 20 30 20 64 69 73  |p the mode 0 dis|
00000c90  70 6c 61 79 20 2d 20 74  68 6f 75 67 68 20 69 74  |play - though it|
00000ca0  20 64 6f 65 73 20 62 72  65 61 6b 0d 75 70 20 61  | does break.up a|
00000cb0  20 62 69 74 20 61 73 20  74 68 65 20 55 4c 41 20  | bit as the ULA |
00000cc0  69 73 20 66 6f 72 63 65  64 20 74 6f 20 72 65 6c  |is forced to rel|
00000cd0  65 61 73 65 20 6d 65 6d  6f 72 79 20 69 6e 20 74  |ease memory in t|
00000ce0  68 65 20 6d 69 64 64 6c  65 20 6f 66 20 73 63 72  |he middle of scr|
00000cf0  65 65 6e 0d 72 65 66 72  65 73 68 65 73 29 2e 0d  |een.refreshes)..|
00000d00  0d 2d 2d 2d 20 59 6f 75  0d 0d 52 65 20 49 6e 74  |.--- You..Re Int|
00000d10  65 72 6e 65 74 2e 20 33  38 36 20 61 6e 64 20 61  |ernet. 386 and a|
00000d20  20 46 61 78 20 4d 6f 64  65 6d 20 3f 20 4e 6f 20  | Fax Modem ? No |
00000d30  6e 65 64 64 79 2c 20 79  6f 75 20 63 61 6e 20 67  |neddy, you can g|
00000d40  65 74 20 61 77 61 79 20  77 69 74 68 0d 61 6e 79  |et away with.any|
00000d50  74 68 69 6e 67 20 79 6f  75 20 77 61 6e 74 20 66  |thing you want f|
00000d60  6f 72 20 6e 6f 72 6d 61  6c 20 65 6d 61 69 6c 20  |or normal email |
00000d70  61 63 63 65 73 73 2c 20  49 20 75 73 65 20 61 20  |access, I use a |
00000d80  32 38 36 20 66 6f 72 20  65 6d 61 69 6c 20 28 61  |286 for email (a|
00000d90  62 6f 75 74 0d 74 68 65  20 6f 6e 6c 79 20 74 68  |bout.the only th|
00000da0  69 6e 67 20 49 20 75 73  65 20 69 74 20 66 6f 72  |ing I use it for|
00000db0  29 2e 20 45 76 65 6e 20  4b 41 39 51 20 28 61 20  |). Even KA9Q (a |
00000dc0  77 65 6c 6c 20 6b 6e 6f  77 6e 20 50 44 20 54 43  |well known PD TC|
00000dd0  50 49 50 20 70 72 6f 67  72 61 6d 29 0d 77 69 6c  |PIP program).wil|
00000de0  6c 20 72 75 6e 20 68 61  70 70 69 6c 79 20 6f 6e  |l run happily on|
00000df0  20 61 20 32 38 36 20 74  6f 20 67 69 76 65 20 79  | a 286 to give y|
00000e00  6f 75 20 74 65 6c 6e 65  74 2c 20 66 74 70 2c 20  |ou telnet, ftp, |
00000e10  65 6d 61 69 6c 20 65 74  63 2e 20 49 74 27 73 20  |email etc. It's |
00000e20  6f 6e 6c 79 0d 77 68 65  6e 20 79 6f 75 20 73 74  |only.when you st|
00000e30  61 72 74 20 67 6f 69 6e  67 20 66 6f 72 20 57 57  |art going for WW|
00000e40  57 20 28 6f 76 65 72 20  72 61 74 65 64 29 20 61  |W (over rated) a|
00000e50  6e 64 20 6e 65 65 64 20  74 68 65 20 67 72 61 70  |nd need the grap|
00000e60  68 69 63 73 20 74 68 61  74 0d 57 69 6e 64 6f 77  |hics that.Window|
00000e70  73 20 28 61 6e 64 20 74  68 75 73 20 70 72 6f 63  |s (and thus proc|
00000e80  65 73 73 69 6e 67 20 70  6f 77 65 72 20 6e 65 65  |essing power nee|
00000e90  64 65 64 29 20 63 6f 6d  65 20 69 6e 74 6f 20 70  |ded) come into p|
00000ea0  6c 61 79 2e 0d 0d 41 6c  74 65 72 6e 61 74 69 76  |lay...Alternativ|
00000eb0  65 6c 79 20 67 65 74 20  61 20 64 65 73 63 65 6e  |ely get a descen|
00000ec0  74 20 63 6f 6d 70 75 74  65 72 2c 20 49 20 64 6f  |t computer, I do|
00000ed0  20 62 65 6c 69 65 76 65  20 61 20 63 6f 6d 70 61  | believe a compa|
00000ee0  6e 79 20 63 61 6c 6c 65  64 20 41 63 6f 72 6e 0d  |ny called Acorn.|
00000ef0  70 72 6f 64 75 63 65 20  73 6f 6d 65 20 2e 2e 2e  |produce some ...|
00000f00  0d 0d 4c 6f 6f 6b 20 6f  75 74 20 66 6f 72 20 6c  |..Look out for l|
00000f10  6f 63 61 6c 20 42 42 73  27 20 77 68 69 63 68 20  |ocal BBs' which |
00000f20  77 69 6c 6c 20 70 72 6f  76 69 64 65 20 65 6d 61  |will provide ema|
00000f30  69 6c 2f 6e 65 77 73 67  72 6f 75 70 20 61 63 63  |il/newsgroup acc|
00000f40  65 73 73 20 66 6f 72 0d  6e 6f 74 68 69 6e 67 2f  |ess for.nothing/|
00000f50  73 6d 61 6c 6c 20 66 65  65 2e 20 4f 74 68 65 72  |small fee. Other|
00000f60  77 69 73 65 20 66 75 6c  6c 20 69 6e 74 65 72 6e  |wise full intern|
00000f70  65 74 20 6f 70 65 72 61  74 6f 72 73 20 28 69 65  |et operators (ie|
00000f80  2e 20 70 72 6f 76 69 64  65 20 64 69 72 65 63 74  |. provide direct|
00000f90  0d 61 63 63 65 73 73 20  74 6f 20 74 68 69 6e 67  |.access to thing|
00000fa0  73 20 6c 69 6b 65 20 57  57 57 2c 20 74 65 6c 6e  |s like WWW, teln|
00000fb0  65 74 2c 20 66 74 70 20  2e 2e 2e 29 20 61 72 65  |et, ftp ...) are|
00000fc0  20 70 72 6f 76 69 64 69  6e 67 20 71 75 69 74 65  | providing quite|
00000fd0  20 65 78 74 65 6e 73 69  76 65 0d 6c 6f 63 61 6c  | extensive.local|
00000fe0  20 63 6f 76 65 72 61 67  65 20 6e 6f 77 2d 61 2d  | coverage now-a-|
00000ff0  64 61 79 73 2e 20 45 6e  63 2e 20 70 69 6c 65 20  |days. Enc. pile |
00001000  6f 66 20 74 65 78 74 20  66 69 6c 65 73 2e 0d 0d  |of text files...|
00001010  2d 2d 2d 20 47 65 72 72  79 20 45 6d 73 6f 6e 0d  |--- Gerry Emson.|
00001020  0d 57 68 61 74 20 79 6f  75 20 68 61 76 65 20 74  |.What you have t|
00001030  68 65 72 65 20 69 73 20  61 20 73 74 61 6e 64 61  |here is a standa|
00001040  72 64 20 50 43 20 73 65  72 69 61 6c 20 6d 6f 75  |rd PC serial mou|
00001050  73 65 2e 20 4e 6f 20 67  6f 6f 64 20 66 6f 72 20  |se. No good for |
00001060  74 68 65 20 45 6c 6b 0d  75 6e 6c 65 73 73 20 79  |the Elk.unless y|
00001070  6f 75 20 66 69 6e 64 20  61 20 73 65 72 69 61 6c  |ou find a serial|
00001080  20 70 6f 72 74 20 61 6e  64 20 77 72 69 74 65 20  | port and write |
00001090  79 6f 75 72 20 6f 77 6e  20 73 6f 66 74 77 61 72  |your own softwar|
000010a0  65 20 2d 20 6e 6f 20 65  78 69 73 74 69 6e 67 0d  |e - no existing.|
000010b0  73 6f 66 74 77 61 72 65  20 77 69 6c 6c 20 73 75  |software will su|
000010c0  70 70 6f 72 74 20 69 74  2e 20 53 65 6c 6c 20 69  |pport it. Sell i|
000010d0  74 20 61 6e 64 20 68 75  6e 74 20 6f 75 74 20 61  |t and hunt out a|
000010e0  6e 20 6f 6c 64 20 75 73  65 72 20 70 6f 72 74 20  |n old user port |
000010f0  28 65 67 2e 20 41 4d 58  29 0d 6d 6f 75 73 65 2e  |(eg. AMX).mouse.|
00001100  0d 0d 49 27 76 65 20 72  75 6e 20 61 6e 20 45 6c  |..I've run an El|
00001110  6b 20 66 72 6f 6d 20 61  20 31 32 76 20 70 6f 77  |k from a 12v pow|
00001120  65 72 20 73 75 70 70 6c  79 20 6e 6f 20 70 72 6f  |er supply no pro|
00001130  62 73 2c 20 61 20 63 61  72 20 62 61 74 74 65 72  |bs, a car batter|
00001140  79 20 73 68 6f 75 6c 64  6e 27 74 0d 62 65 20 6d  |y shouldn't.be m|
00001150  75 63 68 20 64 69 66 66  65 72 65 6e 74 2e 20 54  |uch different. T|
00001160  68 69 73 20 77 61 73 20  67 6f 69 6e 67 20 74 68  |his was going th|
00001170  72 6f 75 67 68 20 74 68  65 20 6e 6f 72 6d 61 6c  |rough the normal|
00001180  20 70 6f 77 65 72 20 63  69 72 63 75 69 74 79 20  | power circuity |
00001190  73 74 61 67 65 0d 2d 20  69 74 20 63 6f 70 65 73  |stage.- it copes|
000011a0  2c 20 73 6f 20 6e 6f 20  6e 65 65 64 20 74 6f 20  |, so no need to |
000011b0  70 72 6f 64 75 63 65 20  2d 35 76 20 79 6f 75 72  |produce -5v your|
000011c0  73 65 6c 66 20 28 77 68  61 74 20 75 73 65 20 69  |self (what use i|
000011d0  73 20 74 68 61 74 20 61  6e 79 77 61 79 2c 20 49  |s that anyway, I|
000011e0  0d 74 68 69 6e 6b 20 69  74 20 6a 75 73 74 20 67  |.think it just g|
000011f0  6f 65 73 20 74 6f 20 74  68 65 20 65 64 67 65 20  |oes to the edge |
00001200  63 6f 6e 6e 65 63 74 6f  72 29 2e 0d 0d 0d 09 09  |connector)......|
00001210  09 59 6f 75 72 73 20 73  69 6e 63 65 72 65 6c 79  |.Yours sincerely|
00001220  2c 0d 0d 09 09 09 09 47  61 72 65 74 68 20 42 61  |,......Gareth Ba|
00001230  62 62 0d 0d 49 20 4c 49  4b 45 44 20 41 4e 44 45  |bb..I LIKED ANDE|
00001240  52 53 4f 4e 20 43 4f 55  4e 54 52 59 2e 0d        |RSON COUNTRY..|
0000124e

L/Babb1.m0

L/Babb1.m1

L/Babb1.m2

L/Babb1.m4

L/Babb1.m5

Our privacy policy is here.
Last updated: 28 Jul 2024, 23:31 UTC
Website designed by .