Search found 202 matches

by Cyprian
Mon Oct 19, 2020 12:41 am
Forum: FPGA DEVELOPMENT
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 309
Views: 59086

Re: BLITTER RE-CREATION THOUGHTS

Great progress Icky One remark, regarding 2nd image / BLiT_H6a4f (actually the same issue is in the 1st but easier shows it here). The first Sparkalaphobia line is 1 bus access shorter than the BLiTTER's one. The difference is visible in the second line: - it starts 1 bus cycle earlier (should be 2 ...
by Cyprian
Sun Oct 18, 2020 1:36 am
Forum: FPGA DEVELOPMENT
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 309
Views: 59086

Re: BLITTER RE-CREATION THOUGHTS

1st image / BLiT_H6a.s 1st_image.png "The green stairs" - One green step is 1 bus cycle long (4 low res pixels / 4 CPU clocks) Top - real STE Red box has 4 bus cycles width (four green steps). Below is the code responsible: ; $FFFF8240: SHIFTER Color Rgister 0 ; $FFFF8A38: BLiTTER Y-Count (count of ...
by Cyprian
Sat Oct 17, 2020 1:28 am
Forum: FPGA DEVELOPMENT
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 309
Views: 59086

Re: BLITTER RE-CREATION THOUGHTS

exxos Icky unfortunately I have a busy day ahead, I'll try write more tomorrow evening . Long short story: 1) I have a suspicion about your FPGA BLiTTER register $FFFF8A38, write to it could introduce 4 CPU cycle delay (red part before the BLiTTER is fired). 2) In general the FPGA BLiTTER cycles lo...
by Cyprian
Fri Oct 16, 2020 8:22 pm
Forum: MEMBER BLOGS
Topic: Granlunds FrankenSTein
Replies: 65
Views: 4078

Re: Granlunds FrankenSTein

well done @agranlund
by Cyprian
Fri Oct 16, 2020 8:17 pm
Forum: FPGA DEVELOPMENT
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 309
Views: 59086

Re: BLITTER RE-CREATION THOUGHTS

I finally got round to looking at this project again this weekend and have made progress. The Sparkalaphobia board is now almost matching a stock BLITTER. ... I have run @Cyprian's test programs and the patterns are a little different to the original BLITTER so may be there is something that can be...
by Cyprian
Mon Sep 28, 2020 6:37 pm
Forum: MEMBER BLOGS
Topic: Icky Projects
Replies: 35
Views: 4463

Re: Icky Projects

Icky wrote:
Sat Aug 22, 2020 2:27 pm
That said it is back up and running and whilst I had it on my desk I thought I would see how the Phoenix Shifter would look. Lots of DIL stacks later and it fitted above the case pillar. Took a screen shot of Frontier just to show it working.
"Phoenix Shifter " nice name. Would be cool to have one!
by Cyprian
Mon Sep 28, 2020 6:34 pm
Forum: TF536 ST EDITION
Topic: Ready built TF536 Atari version. Any Interest?
Replies: 96
Views: 5503

Re: Ready built TF536 Atari version. Any Interest?

mine TF536 just arrived. Looks so cool.
Thanks @PhilC
will install a cpu socked in my short 520ST
by Cyprian
Mon Sep 21, 2020 10:40 pm
Forum: HARDWARE DISCUSSIONS
Topic: Just wondering: TF536 CPU relocator+2.06 decode+ROM all on the one board?
Replies: 26
Views: 641

Re: Just wondering: TF536 CPU relocator+2.06 decode+ROM all on the one board?

If ram works fine on the ribbon cable, would be possible to use it also to relocate TF536?
by Cyprian
Sun Sep 20, 2020 10:09 pm
Forum: HARDWARE ISSUES
Topic: Vertical lines in colour mode.
Replies: 9
Views: 204

Re: Vertical lines in colour mode.

I have never observed a such lined yet.
What about recapping?
by Cyprian
Sun Sep 20, 2020 10:26 am
Forum: CHAT FORUM
Topic: Low price Falcon?!
Replies: 19
Views: 710

Re: Low price Falcon?!

have you seen this (not mine)? https://www.ebay.com/itm/Atari-Falcon-C303001-68030-MICROPROCESSOR-NOS-Factory-sealed/303379824445 ATARI Falcon 68030FE-16 NOS Limited availability. “Brand New Old Stock Atari Falcon C303001 68030 MICROPROCESSOR Factory sealed.” This is for ONE Unopened package contain...

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