Search found 123 matches

by mlynn1974
Sat Nov 18, 2017 12:17 am
Forum: Demos - General
Topic: Best Starfields in Demos, or games?
Replies: 15
Views: 846

Re: Best Starfields in Demos, or games?

Ahhhh, thanks! You know, that's how I'd have done it - surely demos must precalc the 3D projections? I don't think it's necessary to precalc the 3D projections. On the Amiga Paul from DigiTech helped me write a 3D starfield in ASM using integer maths, divs and muls and I got 500 stars at 50Hz. I us...
by mlynn1974
Thu Nov 16, 2017 10:45 pm
Forum: Demos - General
Topic: Best Starfields in Demos, or games?
Replies: 15
Views: 846

Re: Best Starfields in Demos, or games?

I've written an example 2d (horizontal) and 3d starfield in STOS. It requires Misty and Missing Link for dot, wipe and hardkey commands. There is a faster version with a 1 plane clear screen and 1 plane dot routine written in ASM. Please see the attachments. This isn't optimized for speed but might ...
by mlynn1974
Mon Nov 13, 2017 12:38 am
Forum: Demos - General
Topic: Best Starfields in Demos, or games?
Replies: 15
Views: 846

Re: Best Starfields in Demos, or games?

There was a STOS extension purely for generating starfields. I think it was included on a ST Format coverdisk. Yes this was on STF37A\STF37B. It was written by Lee Upcraft Febuary 1992. It includes an extension for the compiler and the interpreter. There are 4 commands: SET STARS 100,t,sx,sy,ex,ey,...
by mlynn1974
Mon Nov 06, 2017 12:16 am
Forum: Demos - General
Topic: Best Starfields in Demos, or games?
Replies: 15
Views: 846

Re: Best Starfields in Demos, or games?

There are some nice starfields in demos by The Lost Boys. The maths isn't too difficult and can easily be implemented in STOS. I seem to remember a great rotating starfield in the Atari STe Mental Hangover demo by The Pixel Twins. Instead of single pixels, you could plot a bob instead. Check this ou...
by mlynn1974
Sat Sep 16, 2017 9:27 pm
Forum: Demos - General
Topic: Mellow Man's collection of CODEF screens
Replies: 0
Views: 532

Mellow Man's collection of CODEF screens

Hi Guys, I've just noticed the amazing work done by Mellow Man in his collection of CODEF screens. http://codef.namwollem.co.uk I don't know if Mellow Man is on the forum but the amount of conversions on there is amazing. Every screen in the So Watt Demo converted to HTML5. Not only has he converted...
by mlynn1974
Tue Aug 29, 2017 11:09 pm
Forum: STOS
Topic: Help setting up STOS
Replies: 12
Views: 710

Re: Help setting up STOS

Yes, you are right. Compiled programs had the .CMP file extension. They must have added something special to the Compiler to protect it a bit. One ACB I used to use a lot was COMPACT.ACB. I have that in my root directory. I never used MAP.ACB but I would simply load it as required: load "MAP.AC...
by mlynn1974
Tue Aug 29, 2017 9:43 pm
Forum: STOS
Topic: Help setting up STOS
Replies: 12
Views: 710

Re: Help setting up STOS

Extensions live in the STOS directory and are named EX[A-Z]. ACB's were compiled programs that weren't standard PRGs. In my STOS 2.6 installation I have the following Extensions in the STOS directory: BLITTER.EXG COMPACT.EXA COMPILER.EXC LINK1.EXQ LINK2.EXR LINK3.EXS MAESTRO.EXD MISTY.EXM SQUASHER.E...
by mlynn1974
Tue Aug 29, 2017 8:36 pm
Forum: Hardware
Topic: Solved: Please Help (Fried Pins) I think i am slowly killing my STE
Replies: 66
Views: 2766

Re: Please Help (Fried Pins) I think i am slowly killing my STE

What an amazing project! I read that some slot cars use 8-18V and to allow 1-1.5A per car but this circuit has a maximum of 22V. What would happen if 2 cars passed the detector at the same time? It's a long time since I've seen a Scelextric so I don't know if that could happen on a double track. In ...
by mlynn1974
Mon Aug 28, 2017 11:28 pm
Forum: Hardware
Topic: Solved: Please Help (Fried Pins) I think i am slowly killing my STE
Replies: 66
Views: 2766

Re: Please Help (Fried Pins) I think i am slowly killing my STE

Sorry if my points are too simple but if your pins are being fried then the voltage or ampage must be too high feeding back to the port. This presents an immediate fire risk. How did you fix the STE to continue testing? Did you put a multimeter on the affected pins to monitor the voltage and ampage?...
by mlynn1974
Thu Aug 24, 2017 11:20 pm
Forum: 680x0
Topic: Disassembling large programs
Replies: 3
Views: 570

Disassembling large programs

Hi, Sorry if this has been asked before. I would like to disassemble the HitSquad version of Head Over Heels to allow keyboard controls and possibly redefinable keys so I don't have to play this with a joystick. I know using Steem I can play it with the joystick remapped to keys but I couldn''t do t...
by mlynn1974
Wed Aug 16, 2017 11:50 pm
Forum: STOS
Topic: Help me test a new STOS demo
Replies: 23
Views: 1834

Re: Help me test a new STOS demo

Hi Thomas, Billy was a great guy. I haven't written anything in STOS since about 1994. I made a few demos that were never released including an unfinished port of the Amiga Legalise It music demo in STOS. This was mainly to show my ST\STE join of the Whizzcat mod player. It worked well but I'm surpr...
by mlynn1974
Wed Aug 16, 2017 9:39 pm
Forum: STOS
Topic: Help me test a new STOS demo
Replies: 23
Views: 1834

Re: Help me test a new STOS demo

Hi Thomas, That's an excellent demo! Well done. The intro and the rotating zoomer are really impressive. This is probably the best STOS demo since the Misty demo. I tested it on: STEEM 3.2, TOS 1.0, 2Mb, STFM. I take it you use STOS 2.08? I personally use STOS 2.06. A backup of my old ST STOS dev sy...
by mlynn1974
Sun Aug 13, 2017 11:56 pm
Forum: Games - General
Topic: Never Ported respectively released for ST
Replies: 128
Views: 28695

Re: Never Ported respectively released for ST

My nominations:
1. Minder (By Don Priestly)
2. Wec Le Mans
3. Batman (Jon Ritman\Bernie Drummond)
Head Over Heels was beautifully converted by Colin Porch but I could never find an original ST version to buy. I'll need to check eBay for that one.
by mlynn1974
Sun Aug 13, 2017 11:37 pm
Forum: Games - General
Topic: There are tons of BEST of threads, how about the WORST ST games?
Replies: 45
Views: 3786

Re: There are tons of BEST of threads, how about the WORST ST games?

Eventhough the ST was a great computer, some games weren't ported as well as they should have been. Sometimes the collision detection wasn't spot on, or the scrolling or the general playability. This must have been due to tight deadlines or just not knowing how to use the hardware to its full abilit...
by mlynn1974
Sun Aug 06, 2017 12:44 am
Forum: STOS
Topic: lower border removal in STOS
Replies: 12
Views: 1515

Re: lower border removal in STOS

Those examples require the border extension. Neil Stewart also wrote an extension to remove the border, improved by Agrajag. I don't know if it was publically released. Maybe it was in PB Disk Maggie. You can pass it a parameter to turn off the upper, lower or both borders. Thomas wants to remove th...
by mlynn1974
Fri Aug 04, 2017 11:49 pm
Forum: STOS
Topic: lower border removal in STOS
Replies: 12
Views: 1515

Re: lower border removal in STOS

Well done Thomas! That runs well in STOS in the interpreter on Steem 3.2 and good old David Whittaker music as well! The compiler initially wouldn't compile the program because of the declaration of DIM SX(LEN(T$)),SY(LEN(T$)) in a subroutine, but used earlier in the main. I fixed that by declaring ...
by mlynn1974
Thu Aug 03, 2017 11:22 pm
Forum: STOS
Topic: lower border removal in STOS
Replies: 12
Views: 1515

Re: lower border removal in STOS

Hi Thomas, I've done a few experiments without much success. The first idea I had was to simply to wait for the scanline to occur, in a tight loop. I know you said not to use assembly but this was just to see what effect the interpreter was having and how much it varied when the program was compiled...
by mlynn1974
Mon Jul 31, 2017 12:43 pm
Forum: Hardware
Topic: Dead 520STF
Replies: 8
Views: 881

Re: Dead 520STF

Have you checked this thread? http://www.atari-forum.com/viewtopic.php?t=23151 This is a suprise to me: Check (2) by observing pin 22 of the CPU (BERR) as the unit is powered on. It should be high always. If there are logic low pulses, some component is malfunctioning and Glue is generating the erro...
by mlynn1974
Sun Jul 30, 2017 11:18 am
Forum: Chat forum [ENG]
Topic: Anybody remember this?
Replies: 8
Views: 2200

Re: Anybody remember this?

My mate at Uni's mum worked at Makro in Hillington near Glasgow at that time and I seem to remember some incredible deal. I think someone in our year getting one, and my neighbour got a Jaguar with Doom at that time. I had to go in to tune it into their telly.
by mlynn1974
Fri Jul 28, 2017 10:48 pm
Forum: Games - General
Topic: Enduro Racer...
Replies: 73
Views: 4810

Re: Enduro Racer...

Was Enduro Racer written by Iain Morrison of Outrun\Turbo Outrun\Hydra\Ice Software fame? It is quite a good conversion for him. Is it in scope to use better graphics? The Sega 16 hardware had 2 68000s at 10MHz. One CPU was used just to draw the road, and didn't it have 128 sprites and graphics scal...
by mlynn1974
Fri Jul 28, 2017 10:36 pm
Forum: Hardware
Topic: Troubles with 1040STe locking up or bombing out
Replies: 22
Views: 1922

Re: Troubles with 1040STe locking up or bombing out

On the STe there does seem to be a lot of capacitors on the motherboard. If you know that the power supply is good and stable that rules out a dodgy power supply. To rule out the Gotek it might be an idea to put in a good, working floppy drive and see how it runs when the ST is warm. You may need to...
by mlynn1974
Thu Jul 27, 2017 12:37 pm
Forum: Hardware
Topic: Troubles with 1040STe locking up or bombing out
Replies: 22
Views: 1922

Re: Troubles with 1040STe locking up or bombing out

3 bombs is an address error.
Reference:
viewtopic.php?t=14501

Does the machine lockup or bomb out when sitting idle or when reading\writing from floppy disk\gotek?
by mlynn1974
Sun Jul 23, 2017 9:33 pm
Forum: Games - General
Topic: Enduro Racer...
Replies: 73
Views: 4810

Re: Enduro Racer...

:D What an excellent idea. I played the Spectrum version of Enduro Racer for ages but not the Atari ST version. The rewrite looks as if you are making excellent progress and I can't wait to play it. Does the timer count down correctly on faster machines or if the frame rate increases? I seem to reme...
by mlynn1974
Sat Jul 22, 2017 9:17 am
Forum: Coding
Topic: Inquiry about 'generated sprites' techniques used on the ST and the Falcon
Replies: 9
Views: 752

Re: Inquiry about 'generated sprites' techniques used on the ST and the Falcon

I don't know if I can add more to what has been already said. In low res (320x200) the STOS BASIC sprite command has the sprite in memory and uses the ROXL instruction to rotate the bits to reposition the sprite depending on the x position and multiply the start line by 160 for display. It then uses...

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