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Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

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dad664npc
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Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

Post by dad664npc »

I have replaced my sd card adapter, which had a 5v to 3.3v reg plus transceiver chip, with a 3.3v part. Now attaining 1.15 MB/s with the SPI clock at 37MHz. The sd cards I have will run at 41MHz, but not 50MHz. So I will play with clocks to gain a little more performance
ATARI STfm, STe, Mega ST, TT
Amstrad CPC464, CPC6128
PiStorm dev - https://github.com/gotaproblem/pistorm-atari
PiStorm JIT dev - https://github.com/gotaproblem/pistorm-atari-jit
Pico HDC - https://bbansolutions.co.uk
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Badwolf
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Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

Post by Badwolf »

dad664npc wrote: Fri Nov 04, 2022 3:59 pm I have replaced my sd card adapter, which had a 5v to 3.3v reg plus transceiver chip, with a 3.3v part. Now attaining 1.15 MB/s with the SPI clock at 37MHz. The sd cards I have will run at 41MHz, but not 50MHz. So I will play with clocks to gain a little more performance
Frankly, that performance is exceptional already, in my book. :thumbup:

I think the Falcon's IDE is only about 1MB/s.

Are there many people who moan about ASCI speeds when the alternative is floppy? :lol:

BW
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Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
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Cyprian
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Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

Post by Cyprian »

Badwolf wrote: Fri Nov 04, 2022 4:35 pm I think the Falcon's IDE is only about 1MB/s.
Depends on a disk driver and the disk itself ( cf, SD or plates one). My best result was 3.2MB/s with Hushi IIRC.

And the CPU accelerator can significantly improve IDE performace.
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dad664npc
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Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

Post by dad664npc »

Two SD cards now work and can perform a copy disk between the two via the integrated shell command 'cpdisk' :D
GitHub updated
ATARI STfm, STe, Mega ST, TT
Amstrad CPC464, CPC6128
PiStorm dev - https://github.com/gotaproblem/pistorm-atari
PiStorm JIT dev - https://github.com/gotaproblem/pistorm-atari-jit
Pico HDC - https://bbansolutions.co.uk
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dad664npc
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Location: Oxfordshire

Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

Post by dad664npc »

First PCBs expected tomorrow

Atari_ST_HDD_EMULATOR.png
Atari_ST_HDD_EMULATOR.png (310.78 KiB) Viewed 475 times
ATARI STfm, STe, Mega ST, TT
Amstrad CPC464, CPC6128
PiStorm dev - https://github.com/gotaproblem/pistorm-atari
PiStorm JIT dev - https://github.com/gotaproblem/pistorm-atari-jit
Pico HDC - https://bbansolutions.co.uk
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Badwolf
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Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

Post by Badwolf »

dad664npc wrote: Tue Dec 06, 2022 10:49 am First PCBs expected tomorrow
Looks a go-er! :thumbup:

BW
DFB1 Open source 50MHz 030 and TT-RAM accelerator for the Falcon
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
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Steve
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Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

Post by Steve »

dad664npc wrote: Fri Nov 04, 2022 3:59 pm I have replaced my sd card adapter, which had a 5v to 3.3v reg plus transceiver chip, with a 3.3v part. Now attaining 1.15 MB/s with the SPI clock at 37MHz. The sd cards I have will run at 41MHz, but not 50MHz. So I will play with clocks to gain a little more performance
I agree with BW, that was exceptional speed. I think most other ACSI emulators max out at around 950k/s!
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Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

Post by sporniket »

Following from afar, great work !
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jfceklosky
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Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

Post by jfceklosky »

The board looks great I would like to my hands on one to test out!
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jfceklosky
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Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

Post by jfceklosky »

I see the github repo for the board schematics above which is great.

Can the gerbers for the board shown above be released? I would like to have some printed and built to test with.


Thanks!
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