BLITTER RE-CREATION THOUGHTS

General discussions or ideas about hardware.
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dhedberg
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Re: BLITTER RE-CREATION THOUGHTS

Post by dhedberg » Thu Apr 19, 2018 1:43 pm

Cyprian wrote:
Thu Apr 19, 2018 1:38 pm
Would be cool to add one feature - hardware C2P conversion.
Like that idea! Would be really nice to have! Too bad it wasn't in there from the beginning! :-(
Daniel, New Beat - http://newbeat.atari.org

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exxos
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Re: BLITTER RE-CREATION THOUGHTS

Post by exxos » Thu Apr 19, 2018 2:29 pm

Cyprian wrote:
Thu Apr 19, 2018 1:38 pm
BLiTTER in FPGA? Really cool idea, I second that.

Would be cool to add one feature - hardware C2P conversion.
Now, a standard C2P - chunky160x100 to 4-bitplane 320x200 can take up to 480 000 cycles. With 160 000 cycles per frame it is 3 frames. With the BLiTTER speed it could take advantage of copy speed - 40KB per frame (In this case C2P frame has 32KB)
Doesn't mean much to me.. but if you can explain it all in detail maybe I can get wolfgang to code it into the core..
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

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Smonson
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Re: BLITTER RE-CREATION THOUGHTS

Post by Smonson » Fri Apr 20, 2018 10:11 am

exxos wrote:
Thu Apr 19, 2018 11:23 am
I went for the cheapest 3.3V one which would work. No use going for a larger more expensive device.
I actually know so little about FPGAs... That's the cheapest one I've ever seen! Well outside silly devices without about 20 LEs that hardly seem worth the effort.

Stimpy
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Re: BLITTER RE-CREATION THOUGHTS

Post by Stimpy » Wed May 02, 2018 10:06 am

Here is some builds in Quartus for some of the Suska parts, thought they are quite interesting numbers.

Cyclone 10LP (10CL055YF484C6G)
55856 Logic Elements

68000 18.86MHz 10143LE (18%)
Blitter 69.45MHz 1403LE (3%)
DMA 197.67MHz 518LE (<1%)
Glue 218.58MHz 591LE (1%)
MMU(DRAM) 141.56MHz 666LE (1%)
Shifter 134.1MHz 1043LE (2%)

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exxos
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Re: BLITTER RE-CREATION THOUGHTS

Post by exxos » Wed May 02, 2018 10:40 am

Little bit of headroom there then :)
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

Stimpy
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Re: BLITTER RE-CREATION THOUGHTS

Post by Stimpy » Wed May 02, 2018 11:46 am

exxos wrote:
Wed May 02, 2018 10:40 am
Little bit of headroom there then :)
Sure, I wanted to just see what it required without the placer breaking a sweat.

Looking at those numbers, especially the FMAX suggest the 68000 would need more time spent on it to improve the delays. Question, is it worth it if the 68000 is still available?

So some prices:

10CL006 ~£7
10CL010 ~£9
10CL016 ~£14
10CL025 ~£19
10CL040 ~£31
10CL055 ~£44

So forgetting the 68000 the 10CL010 would be a good device, probably still only 40% utilised LE.

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