Search found 1020 matches

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: 33
Views: 2903

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: 33
Views: 2903

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: 13043

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: 13043

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: 13043

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: 13043

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: 13043

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: 1125

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: 2374

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: 2374

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: 4404

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: 2101

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: 2092

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: 2064

Re: Drop down menus without 3d border?

Those are beos icons! :)
by Frank B
Thu Feb 28, 2019 6:16 am
Forum: Professionals
Topic: Couple TT hardware questions (UltraSatan, TOM, and NetUSBee)
Replies: 10
Views: 2899

Re: Couple TT hardware questions (UltraSatan, TOM, and NetUSBee)

I see the same issue with the clock loader and set on the TT. The same utrasatan works fine on other machines. The clock utilities don't
seem to work on the TT.
by Frank B
Sun Feb 03, 2019 1:22 pm
Forum: Website Discussions
Topic: a simple way to hide all Mist/Mister posts
Replies: 49
Views: 17855

Re: a simple way to hide all Mist/Mister posts

The mist was an atari and amiga compatible. The mister project killed the original mist and the Mister maintainer doesn't even like the ST. It's a mystery why it belongs on this forum at all.
by Frank B
Fri Feb 01, 2019 4:58 pm
Forum: Website Discussions
Topic: a simple way to hide all Mist/Mister posts
Replies: 49
Views: 17855

Re: a simple way to hide all Mist/Mister posts

I am still for outsourcing them completely from AF due to the sheer volume of posts by now. This makes sense to me - it is its own stand alone product - it should have its own forum. My issue is I consume this website via active topics RSS feed - can an active topics RSS feed be setup without inclu...
by Frank B
Mon Jan 28, 2019 6:03 am
Forum: Hardware
Topic: I just bought an Atari Mega ST4 with hard drive in it!
Replies: 28
Views: 5036

Re: I just bought an Atari Mega ST4 with hard drive in it!

The Mega ST fan is quite noisy. It could be mistaken for a hard disk. Add an ultra satan anyway :)
by Frank B
Sun Jan 27, 2019 5:07 pm
Forum: Applications
Topic: GDOS performance hit
Replies: 12
Views: 3295

Re: GDOS performance hit

Thanks. It works much faster than GDOS. Just need a good laserjet compatible driver and fonts next :)
by Frank B
Sun Jan 27, 2019 4:50 pm
Forum: Applications
Topic: GDOS performance hit
Replies: 12
Views: 3295

Re: GDOS performance hit

https://www.dropbox.com/s/vzso6lvib23nu ... 2.png?dl=0
https://www.dropbox.com/s/7tpofj8646fo6 ... s.png?dl=0

I already got the pcl output working with timeworks and gdos. It has a non standard font set though :(
by Frank B
Sun Jan 27, 2019 4:44 pm
Forum: Applications
Topic: GDOS performance hit
Replies: 12
Views: 3295

Re: GDOS performance hit

It sort of works but the font sizes are 1/4 what they should be with the laserjet. There's supposed to be a laserjet driver for standard GDOS developed by Migraph. It was a paid update for easydraw 2. Does anyone have this by any chance?
by Frank B
Sun Jan 27, 2019 3:40 pm
Forum: Applications
Topic: GDOS performance hit
Replies: 12
Views: 3295

Re: GDOS performance hit

Interesting. I can now print with the laserjet driver from speedo cobbled ontop of the write gdos config with gplus.
I capture the output on hatari and run it through a pcl -> pdf conversion.
by Frank B
Sun Jan 27, 2019 1:28 pm
Forum: Applications
Topic: GDOS performance hit
Replies: 12
Views: 3295

Re: GDOS performance hit

Oh it sort of works with speedo gdos. You can load it up and write a document with it. You just can't load it afterwards :) It'll crash write on document reload. With NVDI is only sees the system font. Even with predefined point sizes.

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