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L/Skner1
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_20.ADF |
| Filename: | L/Skner1 |
| Read OK: | ✔ |
| File size: | 14B9 bytes |
| Load address: | 53204556 |
| Exec address: | 72656E6B |
File contents
115 Meyrick Rd.
Stamshaw
PORTSMOUTH
PO2 8JW
Dear EUG,
Thanks once again, Gus, for your unending efforts
in getting my system to load your disks. Hopefully
your wonderful readers out there willbe able to help me
with my problem. More of that later. I was hoping to
get some prorams up and running for the April issue
but, alas and alack, disc problems.
First program was EUINDEX, a data- base of information
about every article in my (incomplete) collection of
Electron User magazines. I am still feverishly trying
to type all the info in. The program works, but I have
only been able to enter up to 1987 thus far.
Second wasprogram packer, a way of storing MORE than 31
iles on a DFS disk, using a 'lump them all in one big
file' technique. This was where my disk problem first
came to light. Usig the OSGBPB (transfer bytes) call to
transfer files worked, but I could only manage to extract
the first 3 files from each rchive. Not too good if
you have 50 files in an archive
Then came, in respose to a request in EUG 18, Save
Protection. A program which trapped the OSFILE vector and
inserted a checking routine to see i a file existed or
not before going ahead with the SAVE (OR *SAVE).
Unfort-unately, this worked up to the point where it
as supposed to actually save the file, and promptly
regurgitated a 'disk full' error, on an empty disk!
Lastly,a set of memory utilities;Dump, Ascii Dump,
Search, Edit and disassemble. Thesework, but I am
tring to turn them into Machine code at the moment for
relocatability (Hmmm, what a long word)
OK, Back to my disk problem. I have an AP4 on my
'standard' Electron and Plus 1 (Acorn Plus 1,no mods),
running whatever drives I happen to have connected at the
time. Currently, 2 3.5" 720K PC Drives, running on a
PC PSU (Initials and numbers abound). My problem is
that, anything I write to drive 0 in DFS is unreadable
on ANY other dive, anywhere. Anything written on any
other drive, by any Elk,is unreadable on Drive 0,
giving bad tracks all over the hop.
I even had a bash at trying ADFS, to no avail. Every time
I tried to EFORM a disk in drive 1, using the Welcome
disk in drive 0, it went ahead and corrupted the welcome
disk, there-fore, ot even letting me make a back- up
copy. Can anybody help? Please?
On the subjectof AP4's, did you know that you can access
4K of that 8K static RAM chip it carries? No?
Here's how...
It can ONLY be accessed from assembler, as you
need to switch out of BASIC to use it
Any time you use the DFS, you are at risk of
losing the data stored
Warnings out of the way, here's the good bit
First, find out which ROM your DFS's in (mine is R0)
and switch to it, using the following procedure
[OPT whatever
LDA &F4:STA oldrom \Store old ROM
LDA #newrom \DFS ROM No.
STA &F4:STA &FE05 \Swith!
\Here you have Your Program
\&B000-&C000 |
\free to use |
LDA oldrom \Load old ROM
STA &F4:ST &FE05 \Switch
RTS
.oldrom EQUB 0 ]
Accessing this area between &B000 and &C000 should,
theoretically be twice as fast as accessing normal RAM,
beause the Elk thinks it's part of a ROM.
Well, enough wafle for now from this new EUG member,
cheers for a great User group type magazine thingy
Gus, and keep up the good work!
Wayne Skinner
PS: If anybody has ideas to share or problems to
air be it Elk or PC related, pease write to me,
especially if you have queries about my own (as
yet unsubmitted) programs. You can reachme on
01705 782046, or write to me at:
W.M.Skinner t/a VegAsoft
115 Meyrick Road
Stamshaw
Portsmouth
PO2 8J
And if you have seen any PC share-ware written under
the name VegA-soft, please let me know what you
thought of it, as I am thinking about going back
into commercial programming (after a long break)
00000000 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000020 20 20 20 20 31 31 35 20 4d 65 79 72 69 63 6b 20 | 115 Meyrick | 00000030 52 64 2e 20 0d 20 20 20 20 20 20 20 20 20 20 20 |Rd. . | 00000040 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000050 20 20 20 20 20 20 20 20 20 20 53 74 61 6d 73 68 | Stamsh| 00000060 61 77 20 20 0d 20 20 20 20 20 20 20 20 20 20 20 |aw . | 00000070 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000080 20 20 20 20 20 20 20 20 20 20 20 50 4f 52 54 53 | PORTS| 00000090 4d 4f 55 54 48 20 20 20 20 20 20 0d 20 20 20 20 |MOUTH . | 000000a0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 000000c0 20 20 20 50 4f 32 20 38 4a 57 20 20 0d 44 65 61 | PO2 8JW .Dea| 000000d0 72 20 45 55 47 2c 20 20 20 20 20 20 20 20 20 20 |r EUG, | 000000e0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000000f0 20 20 0d 20 20 20 20 20 20 20 54 68 61 6e 6b 73 | . Thanks| 00000100 20 6f 6e 63 65 20 61 67 61 69 6e 2c 20 47 75 73 | once again, Gus| 00000110 2c 20 66 6f 72 20 79 6f 75 72 20 10 75 6e 65 6e |, for your .unen| 00000120 64 69 6e 67 20 65 66 66 6f 72 74 73 20 0d 69 6e |ding efforts .in| 00000130 20 67 65 74 74 69 6e 67 20 6d 79 20 73 79 73 74 | getting my syst| 00000140 65 6d 20 74 6f 20 6c 6f 61 64 20 79 6f 75 72 20 |em to load your | 00000150 10 64 69 73 6b 73 2e 20 48 6f 70 65 66 75 6c 6c |.disks. Hopefull| 00000160 79 20 20 20 0d 79 6f 75 72 20 77 6f 6e 64 65 72 |y .your wonder| 00000170 66 75 6c 20 72 65 61 64 65 72 73 20 6f 75 74 20 |ful readers out | 00000180 74 68 65 72 65 20 77 69 6c 6c 10 62 65 20 61 62 |there will.be ab| 00000190 6c 65 20 74 6f 20 68 65 6c 70 20 6d 65 20 0d 77 |le to help me .w| 000001a0 69 74 68 20 6d 79 20 70 72 6f 62 6c 65 6d 2e 20 |ith my problem. | 000001b0 4d 6f 72 65 20 6f 66 20 74 68 61 74 20 6c 61 74 |More of that lat| 000001c0 65 72 2e 20 10 49 20 77 61 73 20 68 6f 70 69 6e |er. .I was hopin| 000001d0 67 20 74 6f 20 20 20 20 20 0d 67 65 74 20 73 6f |g to .get so| 000001e0 6d 65 20 70 72 6f 72 61 6d 73 20 75 70 20 61 6e |me prorams up an| 000001f0 64 20 72 75 6e 6e 69 6e 67 20 66 6f 72 20 74 68 |d running for th| 00000200 65 20 41 70 72 69 6c 20 69 73 73 75 65 20 0d 62 |e April issue .b| 00000210 75 74 2c 20 61 6c 61 73 20 61 6e 64 20 61 6c 61 |ut, alas and ala| 00000220 63 6b 2c 20 64 69 73 63 20 70 72 6f 62 6c 65 6d |ck, disc problem| 00000230 73 2e 0d 0d 46 69 72 73 74 20 70 72 6f 67 72 61 |s...First progra| 00000240 6d 20 77 61 73 20 45 55 49 4e 44 45 58 2c 20 61 |m was EUINDEX, a| 00000250 20 64 61 74 61 2d 20 62 61 73 65 20 10 6f 66 20 | data- base .of | 00000260 69 6e 66 6f 72 6d 61 74 69 6f 6e 20 0d 61 62 6f |information .abo| 00000270 75 74 20 65 76 65 72 79 20 61 72 74 69 63 6c 65 |ut every article| 00000280 20 69 6e 20 6d 79 20 28 69 6e 63 6f 6d 70 6c 65 | in my (incomple| 00000290 74 65 29 20 10 63 6f 6c 6c 65 63 74 69 6f 6e 20 |te) .collection | 000002a0 6f 66 20 0d 45 6c 65 63 74 72 6f 6e 20 55 73 65 |of .Electron Use| 000002b0 72 20 6d 61 67 61 7a 69 6e 65 73 2e 20 49 20 61 |r magazines. I a| 000002c0 6d 20 73 74 69 6c 6c 20 66 65 76 65 72 69 73 68 |m still feverish| 000002d0 6c 79 20 74 72 79 69 6e 67 20 0d 74 6f 20 74 79 |ly trying .to ty| 000002e0 70 65 20 61 6c 6c 20 74 68 65 20 69 6e 66 6f 20 |pe all the info | 000002f0 20 69 6e 2e 20 54 68 65 20 70 72 6f 67 72 61 6d | in. The program| 00000300 20 10 77 6f 72 6b 73 2c 20 62 75 74 20 49 20 68 | .works, but I h| 00000310 61 76 65 20 0d 6f 6e 6c 79 20 20 62 65 65 6e 20 |ave .only been | 00000320 61 62 6c 65 20 74 6f 20 65 6e 74 65 72 20 75 70 |able to enter up| 00000330 20 74 6f 20 31 39 38 37 20 74 68 75 73 20 10 66 | to 1987 thus .f| 00000340 61 72 2e 20 20 0d 0d 53 65 63 6f 6e 64 20 77 61 |ar. ..Second wa| 00000350 73 10 70 72 6f 67 72 61 6d 20 70 61 63 6b 65 72 |s.program packer| 00000360 2c 20 61 20 77 61 79 20 6f 66 20 73 74 6f 72 69 |, a way of stori| 00000370 6e 67 20 4d 4f 52 45 20 74 68 61 6e 20 33 31 20 |ng MORE than 31 | 00000380 0d 69 6c 65 73 20 6f 6e 20 61 20 10 44 46 53 20 |.iles on a .DFS | 00000390 20 64 69 73 6b 2c 20 75 73 69 6e 67 20 61 20 27 | disk, using a '| 000003a0 6c 75 6d 70 20 74 68 65 6d 20 61 6c 6c 20 69 6e |lump them all in| 000003b0 20 6f 6e 65 20 62 69 67 20 0d 66 69 6c 65 27 20 | one big .file' | 000003c0 10 74 65 63 68 6e 69 71 75 65 2e 20 54 68 69 73 |.technique. This| 000003d0 20 77 61 73 20 77 68 65 72 65 20 6d 79 20 64 69 | was where my di| 000003e0 73 6b 20 70 72 6f 62 6c 65 6d 20 66 69 72 73 74 |sk problem first| 000003f0 20 0d 63 61 6d 65 20 10 74 6f 20 6c 69 67 68 74 | .came .to light| 00000400 2e 20 55 73 69 67 20 74 68 65 20 4f 53 47 42 50 |. Usig the OSGBP| 00000410 42 20 28 74 72 61 6e 73 66 65 72 20 62 79 74 65 |B (transfer byte| 00000420 73 29 20 63 61 6c 6c 20 74 6f 20 20 20 20 20 10 |s) call to .| 00000430 0d 74 72 61 6e 73 66 65 72 20 66 69 6c 65 73 20 |.transfer files | 00000440 77 6f 72 6b 65 64 2c 20 62 75 74 20 49 20 63 6f |worked, but I co| 00000450 75 6c 64 20 6f 6e 6c 79 20 6d 61 6e 61 67 65 20 |uld only manage | 00000460 74 6f 20 65 78 74 72 61 63 74 20 10 0d 74 68 65 |to extract ..the| 00000470 20 66 69 72 73 74 20 33 20 66 69 6c 65 73 20 20 | first 3 files | 00000480 20 20 20 66 72 6f 6d 20 65 61 63 68 20 72 63 68 | from each rch| 00000490 69 76 65 2e 20 4e 6f 74 20 74 6f 6f 20 67 6f 6f |ive. Not too goo| 000004a0 64 20 69 66 20 10 0d 79 6f 75 20 20 68 61 76 65 |d if ..you have| 000004b0 20 35 30 20 66 69 6c 65 73 20 69 6e 20 61 6e 20 | 50 files in an | 000004c0 61 72 63 68 69 76 65 20 20 20 20 20 20 20 20 20 |archive | 000004d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000500 10 0d 0d 54 68 65 6e 20 63 61 6d 65 2c 20 69 6e |...Then came, in| 00000510 20 72 65 73 70 6f 73 65 20 74 6f 20 61 20 72 65 | respose to a re| 00000520 71 75 65 73 74 20 69 6e 20 45 55 47 20 31 38 2c |quest in EUG 18,| 00000530 20 53 61 76 65 20 10 0d 50 72 6f 74 65 63 74 69 | Save ..Protecti| 00000540 6f 6e 2e 20 41 20 70 72 6f 67 72 61 6d 20 20 20 |on. A program | 00000550 77 68 69 63 68 20 74 72 61 70 70 65 64 20 74 68 |which trapped th| 00000560 65 20 4f 53 46 49 4c 45 20 76 65 63 74 6f 72 20 |e OSFILE vector | 00000570 61 6e 64 20 20 20 20 20 10 0d 69 6e 73 65 72 74 |and ..insert| 00000580 65 64 20 61 20 63 68 65 63 6b 69 6e 67 20 72 6f |ed a checking ro| 00000590 75 74 69 6e 65 20 74 6f 20 73 65 65 20 69 20 20 |utine to see i | 000005a0 20 61 20 66 69 6c 65 20 65 78 69 73 74 65 64 20 | a file existed | 000005b0 6f 72 20 10 0d 6e 6f 74 20 62 65 66 6f 72 65 20 |or ..not before | 000005c0 67 6f 69 6e 67 20 61 68 65 61 64 20 77 69 74 68 |going ahead with| 000005d0 20 74 68 65 20 53 41 56 45 20 28 4f 52 20 2a 53 | the SAVE (OR *S| 000005e0 41 56 45 29 2e 20 10 0d 55 6e 66 6f 72 74 2d 75 |AVE). ..Unfort-u| 000005f0 6e 61 74 65 6c 79 2c 20 74 68 69 73 20 77 6f 72 |nately, this wor| 00000600 6b 65 64 20 75 70 20 74 6f 20 74 68 65 20 70 6f |ked up to the po| 00000610 69 6e 74 20 77 68 65 72 65 20 69 74 20 10 0d 61 |int where it ..a| 00000620 73 20 73 75 70 70 6f 73 65 64 20 74 6f 20 61 63 |s supposed to ac| 00000630 74 75 61 6c 6c 79 20 73 61 76 65 20 20 74 68 65 |tually save the| 00000640 20 66 69 6c 65 2c 20 61 6e 64 20 70 72 6f 6d 70 | file, and promp| 00000650 74 6c 79 20 10 0d 72 65 67 75 72 67 69 74 61 74 |tly ..regurgitat| 00000660 65 64 20 61 20 27 64 69 73 6b 20 66 75 6c 6c 27 |ed a 'disk full'| 00000670 20 65 72 72 6f 72 2c 20 6f 6e 20 61 6e 20 65 6d | error, on an em| 00000680 70 74 79 20 64 69 73 6b 21 20 20 20 20 20 20 20 |pty disk! | 00000690 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000006a0 20 20 20 0d 0d 4c 61 73 74 6c 79 2c 61 20 73 65 | ..Lastly,a se| 000006b0 74 20 6f 66 20 6d 65 6d 6f 72 79 20 75 74 69 6c |t of memory util| 000006c0 69 74 69 65 73 3b 10 44 75 6d 70 2c 20 41 73 63 |ities;.Dump, Asc| 000006d0 69 69 20 44 75 6d 70 2c 20 0d 53 65 61 72 63 68 |ii Dump, .Search| 000006e0 2c 20 45 64 69 74 20 61 6e 64 20 64 69 73 61 73 |, Edit and disas| 000006f0 73 65 6d 62 6c 65 2e 20 54 68 65 73 65 10 77 6f |semble. These.wo| 00000700 72 6b 2c 20 62 75 74 20 49 20 61 6d 20 20 20 20 |rk, but I am | 00000710 20 20 0d 74 72 69 6e 67 20 74 6f 20 74 75 72 6e | .tring to turn| 00000720 20 74 68 65 6d 20 69 6e 74 6f 20 4d 61 63 68 69 | them into Machi| 00000730 6e 65 20 63 6f 64 65 20 61 74 20 74 68 65 20 6d |ne code at the m| 00000740 6f 6d 65 6e 74 20 66 6f 72 20 0d 72 65 6c 6f 63 |oment for .reloc| 00000750 61 74 61 62 69 6c 69 74 79 20 28 48 6d 6d 6d 2c |atability (Hmmm,| 00000760 20 77 68 61 74 20 61 20 6c 6f 6e 67 20 77 6f 72 | what a long wor| 00000770 64 29 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |d) | 00000780 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000790 20 0d 0d 4f 4b 2c 20 42 61 63 6b 20 74 6f 20 6d | ..OK, Back to m| 000007a0 79 20 64 69 73 6b 20 10 70 72 6f 62 6c 65 6d 2e |y disk .problem.| 000007b0 20 49 20 68 61 76 65 20 61 6e 20 41 50 34 20 6f | I have an AP4 o| 000007c0 6e 20 6d 79 20 0d 27 73 74 61 6e 64 61 72 64 27 |n my .'standard'| 000007d0 20 45 6c 65 63 74 72 6f 6e 20 61 6e 64 20 50 6c | Electron and Pl| 000007e0 75 73 20 31 20 28 41 63 6f 72 6e 20 50 6c 75 73 |us 1 (Acorn Plus| 000007f0 20 31 2c 6e 6f 20 6d 6f 64 73 29 2c 20 0d 72 75 | 1,no mods), .ru| 00000800 6e 6e 69 6e 67 20 77 68 61 74 65 76 65 72 20 64 |nning whatever d| 00000810 72 69 76 65 73 20 49 20 10 68 61 70 70 65 6e 20 |rives I .happen | 00000820 74 6f 20 68 61 76 65 20 63 6f 6e 6e 65 63 74 65 |to have connecte| 00000830 64 20 61 74 20 74 68 65 20 0d 74 69 6d 65 2e 20 |d at the .time. | 00000840 43 75 72 72 65 6e 74 6c 79 2c 20 32 20 10 33 2e |Currently, 2 .3.| 00000850 35 22 20 37 32 30 4b 20 50 43 20 44 72 69 76 65 |5" 720K PC Drive| 00000860 73 2c 20 72 75 6e 6e 69 6e 67 20 6f 6e 20 61 20 |s, running on a | 00000870 0d 50 43 20 50 53 55 20 28 49 6e 69 74 69 61 6c |.PC PSU (Initial| 00000880 73 20 61 6e 64 20 10 6e 75 6d 62 65 72 73 20 61 |s and .numbers a| 00000890 62 6f 75 6e 64 29 2e 20 4d 79 20 20 20 70 72 6f |bound). My pro| 000008a0 62 6c 65 6d 20 69 73 20 0d 74 68 61 74 2c 20 61 |blem is .that, a| 000008b0 6e 79 74 68 69 6e 67 20 49 20 77 72 69 74 65 20 |nything I write | 000008c0 74 6f 20 64 72 69 76 65 20 30 20 69 6e 20 44 46 |to drive 0 in DF| 000008d0 53 20 69 73 20 75 6e 72 65 61 64 61 62 6c 65 20 |S is unreadable | 000008e0 0d 6f 6e 20 41 4e 59 20 6f 74 68 65 72 20 64 69 |.on ANY other di| 000008f0 76 65 2c 20 10 61 6e 79 77 68 65 72 65 2e 20 41 |ve, .anywhere. A| 00000900 6e 79 74 68 69 6e 67 20 77 72 69 74 74 65 6e 20 |nything written | 00000910 6f 6e 20 61 6e 79 20 0d 6f 74 68 65 72 20 64 72 |on any .other dr| 00000920 69 76 65 2c 20 62 79 20 61 6e 79 20 45 6c 6b 2c |ive, by any Elk,| 00000930 10 69 73 20 75 6e 72 65 61 64 61 62 6c 65 20 6f |.is unreadable o| 00000940 6e 20 44 72 69 76 65 20 30 2c 20 0d 67 69 76 69 |n Drive 0, .givi| 00000950 6e 67 20 62 61 64 20 20 74 72 61 63 6b 73 20 61 |ng bad tracks a| 00000960 6c 6c 20 10 6f 76 65 72 20 74 68 65 20 68 6f 70 |ll .over the hop| 00000970 2e 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |. | 00000980 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 000009a0 20 20 20 20 20 20 20 20 20 20 20 20 20 0d 0d 49 | ..I| 000009b0 20 65 76 65 6e 20 68 61 64 20 61 20 62 61 73 68 | even had a bash| 000009c0 20 61 74 20 74 72 79 69 6e 67 20 41 44 46 53 2c | at trying ADFS,| 000009d0 20 20 74 6f 20 6e 6f 20 61 76 61 69 6c 2e 20 45 | to no avail. E| 000009e0 76 65 72 79 20 74 69 6d 65 20 10 0d 49 20 74 72 |very time ..I tr| 000009f0 69 65 64 20 74 6f 20 45 46 4f 52 4d 20 61 20 64 |ied to EFORM a d| 00000a00 69 73 6b 20 69 6e 20 64 72 69 76 65 20 31 2c 20 |isk in drive 1, | 00000a10 75 73 69 6e 67 20 74 68 65 20 57 65 6c 63 6f 6d |using the Welcom| 00000a20 65 20 0d 64 69 73 6b 20 69 6e 20 64 72 69 76 65 |e .disk in drive| 00000a30 20 30 2c 20 69 74 20 77 65 6e 74 20 61 68 65 61 | 0, it went ahea| 00000a40 64 20 20 61 6e 64 20 63 6f 72 72 75 70 74 65 64 |d and corrupted| 00000a50 20 74 68 65 20 10 77 65 6c 63 6f 6d 65 20 0d 64 | the .welcome .d| 00000a60 69 73 6b 2c 20 74 68 65 72 65 2d 66 6f 72 65 2c |isk, there-fore,| 00000a70 20 6f 74 20 65 76 65 6e 20 6c 65 74 74 69 6e 67 | ot even letting| 00000a80 20 6d 65 20 6d 61 6b 65 20 61 20 10 62 61 63 6b | me make a .back| 00000a90 2d 20 20 75 70 20 0d 63 6f 70 79 2e 20 43 61 6e |- up .copy. Can| 00000aa0 20 61 6e 79 62 6f 64 79 20 68 65 6c 70 3f 20 50 | anybody help? P| 00000ab0 6c 65 61 73 65 3f 20 20 20 20 20 20 20 20 20 20 |lease? | 00000ac0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000ae0 20 20 20 20 20 20 20 20 20 10 0d 0d 4f 6e 20 74 | ...On t| 00000af0 68 65 20 73 75 62 6a 65 63 74 6f 66 20 41 50 34 |he subjectof AP4| 00000b00 27 73 2c 20 64 69 64 20 79 6f 75 20 20 20 6b 6e |'s, did you kn| 00000b10 6f 77 20 74 68 61 74 20 79 6f 75 20 63 61 6e 20 |ow that you can | 00000b20 61 63 63 65 73 73 20 10 0d 34 4b 20 6f 66 20 74 |access ..4K of t| 00000b30 68 61 74 20 20 20 20 20 38 4b 20 73 74 61 74 69 |hat 8K stati| 00000b40 63 20 52 41 4d 20 63 68 69 70 20 69 74 20 63 61 |c RAM chip it ca| 00000b50 72 72 69 65 73 3f 20 4e 6f 3f 20 20 20 20 20 20 |rries? No? | 00000b60 10 0d 48 65 72 65 27 73 20 68 6f 77 2e 2e 2e 20 |..Here's how... | 00000b70 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000b80 20 20 0d 0d 49 74 20 63 61 6e 20 4f 4e 4c 59 20 | ..It can ONLY | 00000b90 62 65 20 61 63 63 65 73 73 65 64 20 66 72 6f 6d |be accessed from| 00000ba0 20 61 73 73 65 6d 62 6c 65 72 2c 20 61 73 20 79 | assembler, as y| 00000bb0 6f 75 20 0d 6e 65 65 64 20 74 6f 20 10 73 77 69 |ou .need to .swi| 00000bc0 74 63 68 20 6f 75 74 20 6f 66 20 42 41 53 49 43 |tch out of BASIC| 00000bd0 20 74 6f 20 75 73 65 20 69 74 20 20 20 20 20 20 | to use it | 00000be0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000c10 20 20 20 20 10 0d 41 6e 79 20 74 69 6d 65 20 79 | ..Any time y| 00000c20 6f 75 20 75 73 65 20 74 68 65 20 44 46 53 2c 20 |ou use the DFS, | 00000c30 79 6f 75 20 61 72 65 20 61 74 20 72 69 73 6b 20 |you are at risk | 00000c40 6f 66 10 0d 6c 6f 73 69 6e 67 20 74 68 65 20 64 |of..losing the d| 00000c50 61 74 61 20 73 74 6f 72 65 64 20 20 20 20 20 20 |ata stored | 00000c60 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000c90 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 10 | .| 00000ca0 0d 57 61 72 6e 69 6e 67 73 20 6f 75 74 20 6f 66 |.Warnings out of| 00000cb0 20 74 68 65 20 77 61 79 2c 20 68 65 72 65 27 73 | the way, here's| 00000cc0 20 74 68 65 20 67 6f 6f 64 20 62 69 74 20 20 20 | the good bit | 00000cd0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000d10 20 20 20 20 20 10 0d 46 69 72 73 74 2c 20 66 69 | ..First, fi| 00000d20 6e 64 20 6f 75 74 20 77 68 69 63 68 20 52 4f 4d |nd out which ROM| 00000d30 20 79 6f 75 72 20 44 46 53 27 73 20 69 6e 20 28 | your DFS's in (| 00000d40 6d 69 6e 65 20 69 73 20 52 30 29 20 10 0d 61 6e |mine is R0) ..an| 00000d50 64 20 73 77 69 74 63 68 20 74 6f 20 69 74 2c 20 |d switch to it, | 00000d60 75 73 69 6e 67 20 74 68 65 20 66 6f 6c 6c 6f 77 |using the follow| 00000d70 69 6e 67 20 70 72 6f 63 65 64 75 72 65 20 20 20 |ing procedure | 00000d80 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000db0 20 10 0d 5b 4f 50 54 20 77 68 61 74 65 76 65 72 | ..[OPT whatever| 00000dc0 20 0d 4c 44 41 20 26 46 34 3a 53 54 41 20 6f 6c | .LDA &F4:STA ol| 00000dd0 64 72 6f 6d 20 5c 53 74 6f 72 65 20 6f 6c 64 20 |drom \Store old | 00000de0 52 4f 4d 20 20 20 20 20 20 20 0d 4c 44 41 20 23 |ROM .LDA #| 00000df0 6e 65 77 72 6f 6d 20 20 20 20 20 20 20 20 5c 44 |newrom \D| 00000e00 46 53 20 52 4f 4d 20 4e 6f 2e 20 20 20 20 20 20 |FS ROM No. | 00000e10 20 20 20 0d 53 54 41 20 26 46 34 3a 53 54 41 20 | .STA &F4:STA | 00000e20 26 46 45 30 35 20 20 5c 53 77 69 74 10 68 21 20 |&FE05 \Swit.h! | 00000e30 20 20 20 20 20 20 20 20 20 20 20 20 20 0d 5c 48 | .\H| 00000e40 65 72 65 20 79 6f 75 20 68 61 76 65 20 20 20 20 |ere you have | 00000e50 20 20 20 20 59 6f 75 72 20 50 72 6f 67 72 61 6d | Your Program| 00000e60 20 20 20 20 20 20 0d 5c 26 42 30 30 30 2d 26 43 | .\&B000-&C| 00000e70 30 30 30 20 20 20 20 20 20 10 20 20 20 20 20 20 |000 . | 00000e80 7c 20 20 20 20 20 20 20 20 20 20 20 20 20 20 0d || .| 00000e90 5c 66 72 65 65 20 74 6f 20 75 73 65 20 20 20 20 |\free to use | 00000ea0 20 20 20 20 20 20 20 20 20 7c 20 20 0d 4c 44 41 | | .LDA| 00000eb0 20 6f 6c 64 72 6f 6d 20 20 20 20 20 20 20 20 20 | oldrom | 00000ec0 5c 4c 6f 61 64 20 6f 6c 64 20 52 4f 4d 20 20 20 |\Load old ROM | 00000ed0 20 20 20 20 20 0d 53 54 41 20 26 46 34 3a 53 54 | .STA &F4:ST| 00000ee0 10 20 26 46 45 30 35 20 20 5c 53 77 69 74 63 68 |. &FE05 \Switch| 00000ef0 20 20 20 0d 52 54 53 20 20 20 20 20 20 20 20 20 | .RTS | 00000f00 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000f10 20 20 20 20 20 20 20 20 20 20 20 20 0d 2e 6f 6c | ..ol| 00000f20 64 72 6f 6d 20 45 51 55 42 20 30 20 5d 20 20 20 |drom EQUB 0 ] | 00000f30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000f50 20 20 20 20 20 20 20 20 20 20 20 20 10 20 20 20 | . | 00000f60 20 20 20 20 20 20 20 0d 0d 41 63 63 65 73 73 69 | ..Accessi| 00000f70 6e 67 20 74 68 69 73 20 61 72 65 61 20 62 65 74 |ng this area bet| 00000f80 77 65 65 6e 20 26 42 30 30 30 20 61 6e 64 20 20 |ween &B000 and | 00000f90 20 26 43 30 30 30 20 73 68 6f 75 6c 64 2c 20 10 | &C000 should, .| 00000fa0 0d 74 68 65 6f 72 65 74 69 63 61 6c 6c 79 20 62 |.theoretically b| 00000fb0 65 20 74 77 69 63 65 20 20 20 20 61 73 20 66 61 |e twice as fa| 00000fc0 73 74 20 61 73 20 61 63 63 65 73 73 69 6e 67 20 |st as accessing | 00000fd0 6e 6f 72 6d 61 6c 20 52 41 4d 2c 20 20 20 20 20 |normal RAM, | 00000fe0 20 20 20 10 0d 62 65 61 75 73 65 20 74 68 65 20 | ..beause the | 00000ff0 45 6c 6b 20 74 68 69 6e 6b 73 20 69 74 27 73 20 |Elk thinks it's | 00001000 70 61 72 74 20 6f 66 20 61 20 20 20 52 4f 4d 2e |part of a ROM.| 00001010 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00001050 20 20 20 20 20 20 20 20 10 0d 57 65 6c 6c 2c 20 | ..Well, | 00001060 65 6e 6f 75 67 68 20 77 61 66 6c 65 20 66 6f 72 |enough wafle for| 00001070 20 6e 6f 77 20 66 72 6f 6d 20 74 68 69 73 20 20 | now from this | 00001080 20 6e 65 77 20 45 55 47 20 6d 65 6d 62 65 72 2c | new EUG member,| 00001090 20 10 0d 63 68 65 65 72 73 20 66 6f 72 20 61 20 | ..cheers for a | 000010a0 67 72 65 61 74 20 55 73 65 72 20 67 72 6f 75 70 |great User group| 000010b0 20 74 79 70 65 20 6d 61 67 61 7a 69 6e 65 20 74 | type magazine t| 000010c0 68 69 6e 67 79 20 10 0d 47 75 73 2c 20 20 20 20 |hingy ..Gus, | 000010d0 61 6e 64 20 6b 65 65 70 20 75 70 20 74 68 65 20 |and keep up the | 000010e0 67 6f 6f 64 20 10 77 6f 72 6b 21 20 20 20 20 20 |good .work! | 000010f0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00001140 20 20 20 20 20 20 20 20 20 20 20 20 0d 57 61 79 | .Way| 00001150 6e 65 20 53 6b 69 6e 6e 65 72 20 20 20 20 20 20 |ne Skinner | 00001160 20 20 20 20 20 20 0d 0d 50 53 3a 20 49 66 20 61 | ..PS: If a| 00001170 6e 79 62 6f 64 79 20 68 61 73 20 10 69 64 65 61 |nybody has .idea| 00001180 73 20 74 6f 20 73 68 61 72 65 20 6f 72 20 70 72 |s to share or pr| 00001190 6f 62 6c 65 6d 73 20 74 6f 20 0d 61 69 72 20 62 |oblems to .air b| 000011a0 65 20 69 74 20 45 6c 6b 20 6f 72 20 50 43 20 72 |e it Elk or PC r| 000011b0 65 6c 61 74 65 64 2c 20 70 65 61 73 65 20 77 72 |elated, pease wr| 000011c0 69 74 65 20 74 6f 20 6d 65 2c 20 20 20 20 20 20 |ite to me, | 000011d0 20 20 20 20 20 20 0d 65 73 70 65 63 69 61 6c 6c | .especiall| 000011e0 79 20 69 66 20 79 6f 75 20 10 68 61 76 65 20 71 |y if you .have q| 000011f0 75 65 72 69 65 73 20 61 62 6f 75 74 20 6d 79 20 |ueries about my | 00001200 6f 77 6e 20 28 61 73 20 0d 79 65 74 20 75 6e 73 |own (as .yet uns| 00001210 75 62 6d 69 74 74 65 64 29 20 20 20 20 20 20 20 |ubmitted) | 00001220 10 70 72 6f 67 72 61 6d 73 2e 20 59 6f 75 20 63 |.programs. 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L/Skner1.m0
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