Search found 153 matches

by mlynn1974
Sun Feb 18, 2018 12:23 am
Forum: Non Atari Platforms
Topic: Noobs use C, real programmers use Basic
Replies: 20
Views: 1083

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: 54
Views: 7140

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: 365

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: 365

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: 154

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: 836

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...
by mlynn1974
Sun Feb 04, 2018 11:52 am
Forum: Non Atari Platforms
Topic: "speccy" ports
Replies: 17
Views: 836

Re: "speccy" ports

Well the infamous Cassette 50 was ported in BASIC from the Apple II. It was one of the first examples of shovelware - a game compilation based on quantity rather than quality. The whole story is here: http://www.wizwords.net/cassette-50/ "they all ran in BASIC and as each computer could underst...
by mlynn1974
Sun Feb 04, 2018 12:35 am
Forum: Non Atari Platforms
Topic: "speccy" ports
Replies: 17
Views: 836

Re: "speccy" ports

I remember reading Cecco's Log in Crash magazine: http://www.crashonline.org.uk/53/cecco.htm Rafaelle Cecco worked for Hewson Consultants who basically employed freelance contractors so I guess there was no "company standard" for development processes: "The Spectrum is actually develo...
by mlynn1974
Fri Feb 02, 2018 12:36 am
Forum: The Digital Department
Topic: Double Buffered Sample Replay Routine
Replies: 6
Views: 634

Re: Double Buffered Sample Replay Routine

Thanks for the advice everyone. If I get the time to work on this I'll share my results. Thanks ggn for reminding me it's Gemdos not Xbios. I'll need to read the STE sound document. I have an example in STOS I don't remember writing that plays the Popeye tune using DMA. It was probably copied from a...
by mlynn1974
Thu Feb 01, 2018 12:18 am
Forum: The Digital Department
Topic: Double Buffered Sample Replay Routine
Replies: 6
Views: 634

Double Buffered Sample Replay Routine

I don't know if this has been done or asked before but I would like to write a double buffered sample replay routine. The aim of this would be to have a library that I could use to make good quality sample demos very quickly. This would have a number of advantages: 1. Long samples bigger than physic...
by mlynn1974
Wed Jan 31, 2018 11:57 pm
Forum: Games - General
Topic: Gianna Sisters - Was (not was) single disk crack
Replies: 9
Views: 714

Re: Gianna Sisters - Was (not was) single disk crack

Nice one Zippy! That's a great story. You are a legend.
by mlynn1974
Mon Jan 29, 2018 10:25 pm
Forum: Non Atari Platforms
Topic: Just made a new ZX spectrum game (48k)
Replies: 13
Views: 849

Re: Just made a new ZX spectrum game (48k)

DI ; 4 clocks F3 LD HL, 16384+6192 ; 10 21 02 80 aloop: DEC HL ; 6 2B bloop: DEC HL ; 6 2B cloop: INC (HL) ; 11 34 JR NZ, cloop ; 7/12 20 FD INC HL ; 6 23 INC (HL) ; 11 34 JR NZ, bloop ; 7/12 20 F8 INC HL ; 6 23 INC (HL) ; 11 34 JR NZ, aloop ; 7/12 20 F3 EI ; 4 FB RET ; 10 C9 I have attached a visu...
by mlynn1974
Mon Jan 29, 2018 1:44 pm
Forum: Non Atari Platforms
Topic: Five finger death punch on zx spectrum
Replies: 8
Views: 497

Re: Five finger death punch on zx spectrum

I don't know if you're joking: The serious answer is the beeper is a very basic 2 channel sound generator. The only guys who made decent digi effects on the 48k were Tim Follin (AgentX, LED Storm), David Whittaker (Dizzy) and Jonathan Smith (Firefly, Mikie). You also don't have enough memory to stor...
by mlynn1974
Mon Jan 29, 2018 1:33 pm
Forum: Non Atari Platforms
Topic: Just made a new ZX spectrum game (48k)
Replies: 13
Views: 849

Re: Just made a new ZX spectrum game (48k)

MrPixel wrote:a: DEC HL ; 6 2B


Put the label on a new line:
a:
DEC HL

also don't use a single letter for a label because 'a' could look like the accumulator register A.
This function will assemble in Z80asm. I didn't try it in SPIN.
by mlynn1974
Mon Jan 29, 2018 1:31 pm
Forum: Hardware
Topic: Dead 520STF
Replies: 37
Views: 2953

Re: Dead 520STF

Well done Sassa! Good work.
by mlynn1974
Fri Jan 26, 2018 12:29 am
Forum: Hardware
Topic: Dead 520STF
Replies: 37
Views: 2953

Re: Dead 520STF

Could you let us know the RAM configuration please.
If you have 4x 256Kx4 DRAMs is it possible to test them by piggybacking a known, working DRAM chip on top?
I saw a guy diagnose an arcade machine board using that technique on YouTube.
by mlynn1974
Mon Jan 22, 2018 1:15 am
Forum: Games - General
Topic: Operation Harrier
Replies: 1
Views: 267

Operation Harrier

I bought a few games on eBay the other week and among them is a boxed version of Operation Harrier. http://www.atarimania.com/game-atari-st-operation-harrier_10135.html It's featured on Automation 447 but it's nice to have the original. It has a weird printed wheel code system which has very dark in...
by mlynn1974
Thu Jan 18, 2018 12:32 am
Forum: Chat forum [ENG]
Topic: Surviving STs
Replies: 32
Views: 1572

Re: Surviving STs

From about 2002-2008 STFMs were quite common on eBay and reasonably priced but the price of old computers has increased steadily since then despite the fact that emulators are now fast and available and products like MisT and ZX-Uno are available. I mean who would buy real hardware when they could p...
by mlynn1974
Tue Jan 16, 2018 5:50 pm
Forum: Hardware
Topic: STfm & STE to Philips CM 8833 MKII monitor cable
Replies: 3
Views: 242

Re: STfm & STE to Philips CM 8833 MKII monitor cable

It seems hard to find an original cable these days.

You could get one of these Scart to Philips CM8833 and then use a more common ST to Scart cable:
https://www.ebay.co.uk/itm/PHILIPS-CM88 ... 0754731999
by mlynn1974
Sun Jan 14, 2018 1:55 pm
Forum: Games - General
Topic: Enchanted Land parallax scroll
Replies: 21
Views: 1726

Re: Enchanted Land parallax scroll

I never quite understood sync scroller. Paul from DigiTech and Neil from Flair tried to explain it to me, but I didn't quite understand it fully at the time (1991). There is also the fairly well documented sync scroller in the source code for the main menu of the Mindbomb demo. That's good. I would ...
by mlynn1974
Sun Jan 14, 2018 1:07 pm
Forum: Games - General
Topic: Gauntlet II vs Ranarama (ST) - Which Is Best?
Replies: 10
Views: 1057

Re: Gauntlet II vs Ranarama (ST) - Which Is Best?

Both are good for different reasons but I'd also say Gauntlet 2.

Ranarama is good for 1 player fun but the sheer number of levels on Gauntlet is amazing.

I seem to remember Gauntlet: The Deeper Dungeons on the Spectrum. An extra 512 levels! I don't think that came out on the Atari ST.
by mlynn1974
Sun Jan 14, 2018 12:59 pm
Forum: MiST
Topic: MIST C64 core
Replies: 110
Views: 31997

Re: MIST C64 core

Hi, I don't own a MIST but I have Jei Ellsworth's C64 DTV. Is that core any good or is the MIST C64 core better\more compatible? A friend of mine said that Jeri's core required a number of control hacks on the supported games for the control inputs to work. I like the VICE C64 emulator for a quick p...
by mlynn1974
Sun Dec 31, 2017 11:36 am
Forum: Applications
Topic: HyperLINK from JMG Software
Replies: 3
Views: 432

Re: HyperLINK from JMG Software

This appears to be missing on Atari Mania: http://www.atarimania.com/utility-atari-st-hyperlink_27994.html It's also not on an Automation disk and there isn't even a demo verison on ST Format Cover disks. You might be able to win a copy on eBay: https://www.ebay.com/itm/Hyperlink-Atari-520-1040-ST-S...
by mlynn1974
Wed Dec 13, 2017 1:37 am
Forum: STOS
Topic: STOS TOME Extension?
Replies: 4
Views: 855

Re: STOS TOME Extension?

Hi, It's a map designer. I have TOME21.EXT but it's only 3581 bytes long. It may have been on an Automation Disk but with no docs. Here's more info: http://www.ultimateamiga.co.uk/HostedProjects/AMOSFactory/TOME4Manual/pages/page66.html I haven't got the mentioned editor. Presumably it was on 2 sing...

Go to advanced search