Search found 83 matches

by tcat
Tue Jan 23, 2018 5:35 pm
Forum: 680x0
Topic: Boot sector and memory crushing
Replies: 24
Views: 1013

Re: Boot sector and memory crushing

Hi Simon, Thank you for encouragement. I have tested the prog on real thing ST. On occasion boot sector is not written and I need to cycle (L)oad, (T)est, untill I see is written, that happens when I try to write to a different floppy, changed in the drive a:\. Is it that TOS keeps some disk cache i...
by tcat
Mon Jan 22, 2018 12:06 pm
Forum: 680x0
Topic: Boot sector and memory crushing
Replies: 24
Views: 1013

Re: Boot sector and memory crushing

Hi, Here is a little program based on Simone's code. It generally installs boot sector from file, or saves current boot sector to it. It can also clear the sector or run a test if code is present. BOOT.zip I saved these boot codes by the prog to toy with. They are all 512 bytes in size. You may need...
by tcat
Sun Jan 21, 2018 11:36 am
Forum: 680x0
Topic: Boot sector and memory crushing
Replies: 24
Views: 1013

Re: Boot sector and memory crushing

Hi Simone, All, Inspired by your assembly code, I dared modifying it as my learning excersise. I hope you take no offence. I realised some boot codes jump $601c, some $601a, seems a matter of personal preference. $1c.w holds NHID (hidden sectors) and is not used by gemdos. So in this code subroutine...
by tcat
Wed Jan 17, 2018 1:30 pm
Forum: 680x0
Topic: Boot sector and memory crushing
Replies: 24
Views: 1013

Re: Boot sector and memory crushing

Hi, I have always wondered how boot sectors work on ATARI, ages ago, with my very 1st ATARI, I just accepted it works without much thinking about it. Now I am glad for commented routines posted here as I can follow while reading a bit about `BIOS boot parameter block' in "ST Concise Guide"...
by tcat
Fri Jan 05, 2018 11:00 am
Forum: For sale / Wanted
Topic: Wanted: TOS Developer's Kit -> Disk #2
Replies: 26
Views: 8111

Re: Wanted: TOS Developer's Kit -> Disk #2

Hi, Rather belatedly I have discovered this discussion, as I may also be the orginator of the plea here, http://www.atari-forum.com/viewtopic.php?f=70&t=25394&p=236581#p236581 I wish to thank you ALL for the effort recovering the DISK_2. Many thanks again. Tomas P.S. I have corrected STCREAT...
by tcat
Wed Jan 03, 2018 10:18 am
Forum: C / PASCAL etc.
Topic: MEGAMAX MODULA-2 - examples
Replies: 15
Views: 5606

Re: MEGAMAX MODULA-2 - examples

Hi Charles,
T[h]omas is the name, tcat just a nick I picked :-)
T.
by tcat
Tue Jan 02, 2018 8:31 pm
Forum: C / PASCAL etc.
Topic: MEGAMAX MODULA-2 - examples
Replies: 15
Views: 5606

Re: MEGAMAX MODULA-2 - examples

Hi, I have updated `MENU.M' module sample, as there was not much menu handling, now is. I realised it is user responsibility to call `NormalTitle()' proc to update highlighted menu. REPEAT MessageEvent (msg); IF msg.msgType = menuSelected THEN (* menu handling here *) END; NormalTitle (menu, msg.sel...
by tcat
Mon Jan 01, 2018 10:12 am
Forum: C / PASCAL etc.
Topic: MEGAMAX MODULA-2 - examples
Replies: 15
Views: 5606

Re: MEGAMAX MODULA-2 - examples

Hi, Should you wish to try Modula-2, here is New Year's treat. I have decomposed Thomas Templeman's MM2 development trunk. I made floppy images, that partly follow original distribution on 4/5 floppies (wrote linux makefiles for it). Please find attached two images. MOS System boot floppy MM2.st Use...
by tcat
Sun Dec 31, 2017 2:25 pm
Forum: C / PASCAL etc.
Topic: MEGAMAX MODULA-2
Replies: 13
Views: 3400

Re: MEGAMAX MODULA-2

Surely Modula-2 is the successor to Pascal? Wirthian languages genealogy. Algol68 -> Pascal -> Modula2 -> Oberon Pascal objective - didactical for teachning structured programming Modula objective - introduced modules, separate unit compilation, dynamic loading, system design (ETH University Lilith...
by tcat
Fri Dec 29, 2017 6:26 pm
Forum: C / PASCAL etc.
Topic: MEGAMAX MODULA-2 - examples
Replies: 15
Views: 5606

Re: MEGAMAX MODULA-2 - examples

Hi, Some time ago I was given `TOS-GIMMICKS' from a fellow Atarian, now finding some time to give them a ride under MM2 system. These little animation tools were coded for TOS magazine in the 90's. As I see `Free Pascal' is getting much attention as it is finding its way to ATARI desktop, I wish to ...
by tcat
Wed Aug 16, 2017 6:16 am
Forum: Hardware
Topic: Manuals Project !!
Replies: 184
Views: 71369

Re: Manuals Project !!

Hi,

I am looking for `ATARI ST Logo Sourcebook', that one is missing in the Atari manual suite, to complete Atari BASIC Source Book, and owners' manuals.

Many thanks
Tom
by tcat
Tue Aug 15, 2017 11:01 am
Forum: Games - Compatibility Issues etc.
Topic: Battle Hawks 1942
Replies: 6
Views: 1817

Re: Battle Hawks 1942

Hi, I have turned monitor brightness quite up, black now appears as dark grey where it should, black remains black, so I can at least tell two colours appart, but my eye site suffers. EDIT, now contrast slightly up, so the brightness, better now. So I dismissed The idea of modifying game pictures, s...
by tcat
Tue Aug 15, 2017 10:52 am
Forum: Games - Compatibility Issues etc.
Topic: Battle Hawks 1942
Replies: 6
Views: 1817

Re: Battle Hawks 1942

Hi, It may well be the case, although I doubt as the darkish gray appears as normal black. Not the case with other games. The game engine seems decompressing images before putting them into display buffer, perhaps if, if I can somehow manage to touchup game image gray in a drawing tool, compress the...
by tcat
Tue Aug 15, 2017 9:49 am
Forum: Games - Compatibility Issues etc.
Topic: Battle Hawks 1942
Replies: 6
Views: 1817

Re: Battle Hawks 1942

Hi, I keep `Hatari' reflecting real ST machine, so the config is the same for both. ATARI ST RainBow TOS v1.04 1MB RAM Floppy, no HD Blitter ON/OFF - has no difference Gray is rendered as Black in `menu screen', `ready room', `pilot cockpit' screens, only on real ST machine. EDIT Please look for the...
by tcat
Mon Aug 14, 2017 8:06 pm
Forum: Games - Compatibility Issues etc.
Topic: Battle Hawks 1942
Replies: 6
Views: 1817

Battle Hawks 1942

Hi, I was thinking what this section is for, now I have a first game that behaves differently under emulator and on the real ST machine. I just discovered this game and the manual, which is quite a piece of interesting read. I can play the game on `Hatari' emulator alright, when copied to floppy, I ...
by tcat
Mon Aug 14, 2017 7:27 pm
Forum: Hardware
Topic: IBM formatted diskettes?
Replies: 14
Views: 1982

Re: IBM formatted diskettes?

Hi, Yes TOS is mighty, although it borrows from CP/M, so does the MS-DOS. I think what confuses my ST is that those few floppies labeled `IBM FORMAT', were factory pre-formatted, some low level info lingers on magnetic. I have tried these... Verbatim 2HD - DD OK Maxwell 2HD - DD OK NO-NAME 2HD - DD ...
by tcat
Mon Aug 14, 2017 6:39 pm
Forum: Hardware
Topic: IBM formatted diskettes?
Replies: 14
Views: 1982

Re: IBM formatted diskettes?

Hi, I have only a few 2DD diskettes, I keep them formatted 720K, 800K, 820K. With `dd' command on linux machine, I copy an image needed to get across. On ST I duplicate the image from 2DD to 2HD floppy (I have many 2HD disks here) keeping original geometry and format. This seems to have worked for m...
by tcat
Mon Aug 14, 2017 7:57 am
Forum: Hardware
Topic: IBM formatted diskettes?
Replies: 14
Views: 1982

Re: IBM formatted diskettes?

Hi, Just discovered this post and I wish to also share my experience. I have quite a few Verbatim 2HD floppies, and only 6 of them are labeled `IBM FORMAT', and they do not 2DD format on standard ST drive, and have also R/W checksum errors, while all the others non `IBM FORMAT' do format 2DD on ST a...
by tcat
Sun Jan 08, 2017 9:54 am
Forum: 680x0
Topic: GFA Debugger - Trap#6 exception
Replies: 10
Views: 2695

Re: GFA Debugger - Trap#6 exception

Hi, I have now patched `gfa-dbg.prg', transient debugger version, resutling in the binary size same as corrupt original. This is possibly best I could do just by patching between two code variants, and without any reengineering skills. EDIT image update Jan-12'17 Please find updated image, which is ...
by tcat
Mon Dec 19, 2016 11:18 am
Forum: 680x0
Topic: GFA Debugger - Trap#6 exception
Replies: 10
Views: 2695

Re: GFA Debugger - Trap#6 exception

Hi, I am attaching GFA-Assembler updated image. gfa_assembleur2.st image 724K contains: assemble.ec* contenu.txt* gfa-asm.inf* kompat.mon* printer.hex* assemble.key* convert.prg* gfa-asm.prg* make_hex.is* atari.is* demo.txt* gfa-dbga.prg* make_hex.ttp* call_deb.prg* desktop.inf* gfa-dbg.prg* printer...
by tcat
Wed Dec 14, 2016 10:49 am
Forum: 680x0
Topic: GFA Debugger - Trap#6 exception
Replies: 10
Views: 2695

Re: GFA Debugger - Trap#6 exception

Hi, I discovered that my copy of ER Assembler is also corrupt, what a bad luck. Although it does assemble example code provided on the disk, it does not generate executable either. The advantage of ER Assembler probably is, it can process output from ER Disassembler directly without need of any code...
by tcat
Mon Dec 12, 2016 6:53 pm
Forum: C / PASCAL etc.
Topic: MEGAMAX MODULA-2 - examples
Replies: 15
Views: 5606

Re: MEGAMAX MODULA-2 - examples

Hi MrWeb, I took some interest in MM-2 as I learnt `Oxyd' was coded using this development tool. I still consider myself a good starter, not professional coder in MM-2. You may send your emails to thomas.kral(at)email.cz, while you cannot PM. You may also follow some old discussion here: http://www....
by tcat
Fri Dec 09, 2016 8:48 pm
Forum: 680x0
Topic: GFA Debugger - Trap#6 exception
Replies: 10
Views: 2695

Re: GFA Debugger - Trap#6 exception

Hi, I have patched by hand a portion of `gfa-dbga.q' disassembly, that required some 352 label relocations. That is just a first try, and now I wish to re-assemble back to the executable, so I can test further. I use ER Macro Assembler found on the `EasyRider' disk, altough assembly gives no errors,...
by tcat
Sat Dec 03, 2016 8:58 pm
Forum: 680x0
Topic: GFA Debugger - Trap#6 exception
Replies: 10
Views: 2695

Re: GFA Debugger - Trap#6 exception

Hi, Comparing both disassemblies further, proved that binaries are corrupt. Furtunately each binary seems corrupt at different place, as the codes are almost identical I can try to patch good parts between them. Resident debugger version seems corrupt only in one part, while transient one quite many...
by tcat
Fri Dec 02, 2016 3:10 pm
Forum: 680x0
Topic: GFA Debugger - Trap#6 exception
Replies: 10
Views: 2695

Re: GFA Debugger - Trap#6 exception

Hi, I am not able to make much progress, but I have a new observation. I tried to also debug `GFA-DBGA.PRG' which is a companion resident debugger version. And I was surprised to see a TRAP#6 handler installed. GFA-DBGA.PRG - resident version.png This gave me a new hope, so I also disassembled `GFA-...

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