Search found 1029 matches

by Frank B
Fri Jul 31, 2020 7:05 am
Forum: Coding
Topic: Atari STE Blitter objects demo (new record)
Replies: 88
Views: 9698

Re: Atari STE Blitter objects demo (new record)

Good news :)
by Frank B
Sun Jul 26, 2020 5:12 pm
Forum: Coding
Topic: Atari STE Blitter objects demo (new record)
Replies: 88
Views: 9698

Re: Atari STE Blitter objects demo (new record)

I think so. It wasn't rated for 8 and ran too hot. There's a part number here for a 6 mhz model https://archive.org/stream/bitsavers_hi ... k_djvu.txt
by Frank B
Sun Jul 26, 2020 12:31 pm
Forum: Coding
Topic: Atari STE Blitter objects demo (new record)
Replies: 88
Views: 9698

Re: Atari STE Blitter objects demo (new record)

I had an STe which behaved unreliably with a momsterbaord fitted. It turns out Atari put a 6 mhz 68000 in it. it was fine with being overlocked to 8 until the monster board went in. Simbo replaced it with a 12 mhz part and the machine was rock solid.
by Frank B
Fri Jul 24, 2020 5:14 pm
Forum: Coding
Topic: Atari STE Blitter objects demo (new record)
Replies: 88
Views: 9698

Re: Atari STE Blitter objects demo (new record)

Sascha if it's the standalone blitter chip that's gone bad I have a spare one somewhere.
by Frank B
Thu Jun 18, 2020 6:28 am
Forum: Demos - General
Topic: STE Blitter
Replies: 19
Views: 3236

Re: STE Blitter

Even with regular masking the blitter is faster than pre shifting with the CPU. It uses 20 times less memory when doing it on a 32*32 sprite. The CPU cannot beat the bliter executing the same algorithm via and/or passes. The CPU cannot beat the blitter when individual planes need to be accessed. Shi...
by Frank B
Sun Apr 26, 2020 2:20 pm
Forum: Applications
Topic: TeraDesk 2020 build
Replies: 20
Views: 3196

Re: TeraDesk 2020 build

Please add a UI control to allow for perfect pixel x positioning of windows. I looked at the code years ago when I hacked it out of a demo build. I think there's a macro to align to multiple of 8. With a blitter there's no real gain to aligning windows on a course grid :)
by Frank B
Wed Apr 22, 2020 11:20 am
Forum: News & Announcements
Topic: Silly Venture 2020 - uniting all ATARI scenes since 2000!
Replies: 17
Views: 3127

Re: Silly Venture 2020 - uniting all ATARI scenes since 2000!

Nice. Any idea of the exact birthday date for the ST? I've been going by the burn in rom date of the earliest disk based TOS I can find. Would be good to get the confirmed date.
by Frank B
Fri Apr 17, 2020 8:13 pm
Forum: Games - General
Topic: Atari STe game with all STe enhancements
Replies: 7
Views: 1749

Re: Atari STe game with all STe enhancements

Switch it to fast mode 2-3 vbl, enable the cheat modes and let it run to the end with and without the blitter active. You can watch it drop frames far more often with the blitter off. It even drops frames on the Amiga. It does it slightly less often on the Amiga.
by Frank B
Sun Apr 05, 2020 8:32 am
Forum: Coding
Topic: [A]tari [G]ame [T]ools - 2D prototyping engine for STE
Replies: 350
Views: 93789

Re: [A]tari [G]ame [T]ools - 2D prototyping engine for STE

Hey Doug! Hope you're doing well with all this craziness!
by Frank B
Wed Mar 18, 2020 7:48 pm
Forum: Professionals
Topic: Fastest way to move 256 words on 68030 TT for 4096 colour display
Replies: 42
Views: 6886

Re: Fastest way to move 256 words on 68030 TT for 4096 colour display

Why not have black scanlines every alternate line reducing your resolution from 320 * 400 to 320 * 200 and trigger the interrupt every blanked line. That way providing you have the time to load in a single line the timing is less critical. Also half the interrupt overhead too.
by Frank B
Tue Jan 28, 2020 6:52 am
Forum: Professionals
Topic: Fastest way to move 256 words on 68030 TT for 4096 colour display
Replies: 42
Views: 6886

Re: Fastest way to move 256 words on 68030 TT

256 pixel wide true colour screen via rasters? :D Can you move the code and palette data to fast ram?
by Frank B
Mon Jan 20, 2020 4:42 pm
Forum: Games - General
Topic: Lotus Esprit Turbo Challenge - STE enhanced (WIP)
Replies: 52
Views: 17878

Re: Lotus Esprit Turbo Challenge - STE enhanced (WIP)

It might be the only option when rasters need to be stable. 64 bus cycles is half a scan line of CPU time. That's too long to be locked off the bus. If the number of objects is reasonably stable you could blit the first few in hog mode. A 32 pixel sprite is 3 words wide, RMW, RMW, RW. 8 bus cycles w...
by Frank B
Mon Jan 20, 2020 6:43 am
Forum: Games - General
Topic: Lotus Esprit Turbo Challenge - STE enhanced (WIP)
Replies: 52
Views: 17878

Re: Lotus Esprit Turbo Challenge - STE enhanced (WIP)

The benefit is that you are in control of the timeslice used by the blitter. It will allow you to use timerb but it will also slow down the blit.
by Frank B
Sat Jan 18, 2020 8:57 am
Forum: Games - General
Topic: Lotus Esprit Turbo Challenge - STE enhanced (WIP)
Replies: 52
Views: 17878

Re: Lotus Esprit Turbo Challenge - STE enhanced (WIP)

You could split the blit up and restart it every n lines. It'll be slower but it will allow interrupts to happen. Might be an option. You can use hog mode too.
by Frank B
Thu Dec 26, 2019 10:47 am
Forum: Games - General
Topic: Lotus Esprit Turbo Challenge - STE enhanced (WIP)
Replies: 52
Views: 17878

Re: Lotus Esprit Turbo Challenge - STE enhanced (WIP)

You can also shave 10% of the draw time with the blitter if the source sprite/mask data is properly aligned. You can use NFSR and null out the last column read as you'll be writing an extra column for the shift. For a 32 wide sprite spanning 3 words written to dest it would be rmw/rmw/mw instead of ...
by Frank B
Tue Dec 24, 2019 5:02 pm
Forum: Games - General
Topic: Lotus Esprit Turbo Challenge - STE enhanced (WIP)
Replies: 52
Views: 17878

Re: Lotus Esprit Turbo Challenge - STE enhanced (WIP)

Already looking good!
If you use anima's sprite rendering blitter technique you should be able to use timer b for the rasters. The speed up should also be significant for drawing the cars in the game.
by Frank B
Tue Nov 05, 2019 8:17 am
Forum: Chat forum [ENG]
Topic: Cynix PO Box letters
Replies: 2
Views: 1742

Re: Cynix PO Box letters

Nice :)
by Frank B
Mon Sep 16, 2019 4:38 pm
Forum: Hardware
Topic: Someone has open sourced an STM/STF Blitter/TOS 2.0 and IDE expansion board
Replies: 12
Views: 3673

Re: Someone has open sourced an STM/STF Blitter/TOS 2.0 and IDE expansion board

Zero wait state fast RAM, ST RAM + cache accelerator and software controllable ROM switcher too... :)
by Frank B
Sun Sep 15, 2019 9:44 am
Forum: Hardware
Topic: Someone has open sourced an STM/STF Blitter/TOS 2.0 and IDE expansion board
Replies: 12
Views: 3673

Someone has open sourced an STM/STF Blitter/TOS 2.0 and IDE expansion board

Someone has open sourced an STM/STF Blitter/TOS 2.0 and IDE expansion board

Details here

http://www.happydaze.se/stblitter/?fbcl ... 1yjd8-wNHA

It's like the blitter upgrade atari promised and didn't deliver in the 80s :)
by Frank B
Mon May 20, 2019 5:17 pm
Forum: Hardware
Topic: Had an Amiga first, then bought an ST later??
Replies: 20
Views: 5858

Re: Had an Amiga first, then bought an ST later??

It's simple. I love them both! Absolutely the best computers ever built.
by Frank B
Fri May 03, 2019 5:32 am
Forum: Applications
Topic: Microsoft Write - TT compatible?
Replies: 4
Views: 2758

Re: Microsoft Write - TT compatible?

It two bombs out on me. I have fast ram in my TT. Might be that.
by Frank B
Fri Apr 05, 2019 8:51 pm
Forum: Professionals
Topic: Difference between TOS 4.00 > 4.04
Replies: 3
Views: 2708

Re: Difference between TOS 4.00 > 4.04

TOS 4.0 has a white back ground on all GEM dialogs. Only the buttons have the grey 3D look. That’s the most visible change. I have TOS 4.0 and 4.04 on 2 different machines.
by Frank B
Sun Mar 10, 2019 10:57 am
Forum: Professionals
Topic: Drop down menus without 3d border?
Replies: 3
Views: 2869

Re: Drop down menus without 3d border?

Those are beos icons! :)

Go to advanced search