Search found 172 matches

by mlynn1974
Mon Jun 18, 2018 11:55 pm
Forum: Hardware
Topic: Wavy video on 1040 STF
Replies: 9
Views: 1117

Re: Wavy video on 1040 STF

This may sound silly but does your STF have all the shielding in place? In particular there should be a shielding box around the video shifter. I'm not an expert on this but the American FCC at the time had some strict regulations about Radio Frequency Interference (RFI). The shielding should be the...
by mlynn1974
Mon Jun 11, 2018 9:06 pm
Forum: Hardware
Topic: Recapping an ST board - is it worth?
Replies: 10
Views: 820

Re: Recapping an ST board - is it worth?

I think it is worth it to recap your power supply if you want to keep your Atari running. I had a 20 year old epoxy filled Spectrum power supply go up in smoke and was glad it didn't damage my Speccy. I don't know if Wang capacitors were that bad. The Bad Capacitors web site was, I thought, in respo...
by mlynn1974
Sun Jun 10, 2018 8:33 pm
Forum: Demos - General
Topic: grodan and kvack kvack demo (TCB)
Replies: 25
Views: 12415

Re: grodan and kvack kvack demo (TCB)

It seems to depend on the supported modes on the video cards. I really should support in a Window mode, but I never found a way to sync with the vertical blank in DirectX without taking 100% CPU time!
by mlynn1974
Sun Jun 10, 2018 7:37 pm
Forum: Demos - General
Topic: grodan and kvack kvack demo (TCB)
Replies: 25
Views: 12415

Re: grodan and kvack kvack demo (TCB)

Whoa! Thank you very much. :D
by mlynn1974
Thu May 10, 2018 11:05 pm
Forum: Hardware
Topic: Reset button not working on STF
Replies: 2
Views: 451

Re: Reset button not working on STF

Thanks Greenious! The STF has been stored in a warm, dry room sitting on it's edge with the floppy drive facing up. I really should put it in a box with a dust cover. I might have time to open it up over the weekend and see if there's anything obvious. I'll check the L-shaped pins.
by mlynn1974
Thu May 10, 2018 12:36 am
Forum: STOS
Topic: Hardwarescrolling Control3.5a extension
Replies: 49
Views: 4402

Re: Hardwarescrolling Control3.5a extension

Hi freddex73, The hardware scrolling effect looks amazing in your demo. It's smoother than the Violent Death game Colin wrote with the Missing Link (STFM - no hardware scrolling). I wasn't aware of the Hardware Scrolling Control 3.5a extension. I think it's probably best to use Thomas's playfield sy...
by mlynn1974
Thu May 10, 2018 12:20 am
Forum: Hardware
Topic: Reset button not working on STF
Replies: 2
Views: 451

Reset button not working on STF

Hi,
I tested my 2.5Mb STF a few weeks ago and the reset button is not working. The spring is OK and the button returns to its normal position but it doesn't cause a reset. I haven't opened the machine recently but was wondering if anyone has seen this problem before or what the solution could be.
by mlynn1974
Mon Apr 30, 2018 9:18 pm
Forum: STOS
Topic: STOS Coders - Atari ST, new Facebook group.
Replies: 14
Views: 1325

Re: STOS Coders - Atari ST, new Facebook group.

I personally don't use Facebook at all. I never have. But I like STOS and I wish I had more time to write programs using it!

I'll contribute and watch the STOS forum thread on Atari-forum but I don't want to sign up or buy into Facebook at all.
by mlynn1974
Wed Apr 18, 2018 7:48 pm
Forum: Games
Topic: One last thing
Replies: 15
Views: 1969

Re: One last thing

I also thought about unrolling the loop. I don't know the effects of the 68030 cache or instruction timing differences between the 68000 but I did some rough calculations. At 16MHz we have 320,000 clock cycles per frame. dbra cost: 640/32=20 dbra instructions per scanline iteration 20*10=200cc when ...
by mlynn1974
Mon Apr 16, 2018 11:01 pm
Forum: Games
Topic: One last thing
Replies: 15
Views: 1969

Re: One last thing

Maybe you're using an old Hatari version that had a CPU bug ? No it's just shift is the fire key and sticky keys on Windows 10 was causing the problem! The last time I used Hatari was on Windows Vista. I've turned sticky keys off. On the plus side, the blitter code (especially the scrolling) is pre...
by mlynn1974
Mon Apr 16, 2018 9:24 pm
Forum: Games
Topic: One last thing
Replies: 15
Views: 1969

Re: One last thing

I don't have a Falcon, but I tried it on Hatari. The music is excellent and the game scrolling is very smooth. The collision detection seems a bit iffy in that I couldn't shoot anyone. Maybe I'm just too slow. Hatari emulating a 68030 Falcon, 4Mb RAM, no DSP and EmuTOS on my little N4200 laptop is v...
by mlynn1974
Sat Mar 31, 2018 7:48 pm
Forum: Applications
Topic: Devpac File Selector Bug in TOS 1.00
Replies: 3
Views: 956

Devpac File Selector Bug in TOS 1.00

For development I use Steem 3.2 (or Steem SSE if I want STE features) with a hard disk mapped to my Windows drive. I like it and I can edit my files in my favourite text editor and assemble them with Devpac. I try to keep all the filenames in the standard 8.3 file name format. Today I found a bug us...
by mlynn1974
Mon Mar 26, 2018 11:07 pm
Forum: For sale / Wanted
Topic: [Wanted] French Power pack + Swedish Familjepaketet
Replies: 2
Views: 749

Re: [Wanted] French Power pack + Swedish Familjepaketet

What a fantastic collection! You've probably seen this one before: https://www.ebay.co.uk/itm/ATARI-520-STE-ST-STF-en-boite-4-MB-de-RAM-TOS-1-62-francais-Teste-OK/282879732619 I can't believe he's asking 240 Euros. The box isn't in great condition and the STe's case is in poor condition. The interes...
by mlynn1974
Fri Mar 23, 2018 10:42 pm
Forum: Non Atari Platforms
Topic: how to get multiple colors on a zx spectrum 48k
Replies: 16
Views: 1684

Re: how to get multiple colors on a zx spectrum 48k

You should check out Dominic Robinson's Rainbow Processor: http://www.worldofspectrum.org/infoseekid.cgi?id=0013421 It looks like ST rasters but it's not in the borders. It shows great control of the colour palette though. There is information on how to control the border colours in the ULA book: ht...
by mlynn1974
Fri Mar 16, 2018 11:45 pm
Forum: Non Atari Platforms
Topic: How not to use an Amiga
Replies: 17
Views: 2049

Re: How not to use an Amiga

What a waste. If that had poked someone's eye out they wouldn't have laughed. No eye protection or anything. The serious point is that even though the computer is old it could have been used for spare parts. There is another video on YouTube of a guy breaking up an Outrun Cabinet. There were only 30...
by mlynn1974
Fri Mar 16, 2018 11:39 pm
Forum: Coding
Topic: why use ASM anymore
Replies: 76
Views: 6734

Re: why use ASM anymore

People who write operating systems, drivers, compilers or work on embedded, real-time or "constrained" systems really need to know assembly language. You should simply use the right tools for the job. Use the language that will produce the required program in the time scale or budget. In m...
by mlynn1974
Sun Mar 04, 2018 10:24 pm
Forum: Games - General
Topic: Future Wars crack intro music
Replies: 4
Views: 1320

Re: Future Wars crack intro music

For those who would like to hear the tune but don't have the Delight menu the intro itself can be downloaded from Demozoo:
https://demozoo.org/productions/139438/
Very nice tune.
by mlynn1974
Wed Feb 28, 2018 8:43 pm
Forum: Chat forum [ENG]
Topic: ‪Maplin Electronics in administration‬
Replies: 8
Views: 1589

Re: ‪Maplin Electronicss in administration‬

It's a real shame because the staff are very knowledgeable. I was in a store 2 weeks ago and the electronics parts counter was closed. I was looking for a figure of 8 cable, but they had none in stock. At least at Maplins you know you will get a quality item unlike the random quality of buying a cha...
by mlynn1974
Wed Feb 28, 2018 1:01 am
Forum: Chat forum [ENG]
Topic: Computer crime in Scotland, 1996
Replies: 23
Views: 2747

Re: Computer crime in Scotland, 1996

Thanks for that Zippy. Great to see The Barras again. No Iain and Peter? Peter was a gentleman. I sold about 350 DSDD disks to him in 1997 for £60 as I had copied them to ZIP disks. I have no idea what he did with them at that stage. There was another documentary presented by Dominik Diamond on STV ...
by mlynn1974
Sun Feb 18, 2018 12:23 am
Forum: Non Atari Platforms
Topic: Noobs use C, real programmers use Basic
Replies: 95
Views: 7828

Re: Noobs use C, real programmers use Basic

BASIC was popular and give rise to languages like Visual BASIC for good or for bad in the 70s and 80s because computing needed applications to be developed quickly and easily. It was also a good first language for many. It was suitable for the constraints of systems of that era. It is a language tha...
by mlynn1974
Thu Feb 15, 2018 10:23 pm
Forum: Hardware
Topic: How much RAM in your Atari ST?
Replies: 64
Views: 10099

Re: How much RAM in your Atari ST?

512k on STFM
2.5Mb on STF
4Mb on STe
Back in the day 2.5Mb was quite common on STFs.
by mlynn1974
Thu Feb 15, 2018 12:07 am
Forum: STOS
Topic: double buffered dmasound player in stos
Replies: 4
Views: 1374

Re: double buffered dmasound player in stos

When you mean write in assembly, are you meaning to create an actual extension for STOS? No I was thinking of writing the whole routine in assembly. I don't know how to write a full extension from scratch. STOS is fine for a quick prototype. I think the demo code like a scroller or sprites would ha...
by mlynn1974
Mon Feb 12, 2018 1:42 am
Forum: STOS
Topic: double buffered dmasound player in stos
Replies: 4
Views: 1374

double buffered dmasound player in stos

I have written a double buffered DMA sound player in STOS. It uses DMA Sound so it is really only STE compatible, but Steem will play it just fine. It also uses gemdos fopen\fread\fseek\fclose (see my other post). It is a prototype for such a routine which I might try to write in assembly (with STFM...
by mlynn1974
Mon Feb 12, 2018 1:32 am
Forum: STOS
Topic: calling GemDOS functions in STOS
Replies: 0
Views: 991

calling GemDOS functions in STOS

Hi, I have written a small routine in assembly language to allow STOS to use fopen\fread\fseek and fclose. This was necessary to write my double buffered sample player in STOS. Bload is fine, but it doesn't allow partial loading or seeking to a part of the file and reading it into a smaller buffer. ...
by mlynn1974
Sun Feb 04, 2018 11:56 pm
Forum: Non Atari Platforms
Topic: "speccy" ports
Replies: 17
Views: 1869

Re: "speccy" ports

The Spectrum had a chip called the ULA (Uncommitted Logic Array). It dealt with tape and keyboard I/O and all graphics generation. I recommend you read this book: http://www.zxdesign.info/book/theZXSpectrumULA.shtml And the Complete Spectrum ROM Disassembly by Dr Ian Logan: http://www.primrosebank.n...

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