Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

dad664npc · Post by **dad664npc** » 04 Nov 2022 15:59

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

Badwolf · Post by **Badwolf** » 04 Nov 2022 16:35

dad664npc wrote: 04 Nov 2022 15:59 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

Cyprian · Post by **Cyprian** » 04 Nov 2022 16:40

Badwolf wrote: 04 Nov 2022 16:35 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.

dad664npc · Post by **dad664npc** » 09 Nov 2022 10:56

Two SD cards now work and can perform a copy disk between the two via the integrated shell command 'cpdisk' :D
GitHub updated

dad664npc · Post by **dad664npc** » 06 Dec 2022 10:49

First PCBs expected tomorrow

Atari_ST_HDD_EMULATOR.png

Badwolf · Post by **Badwolf** » 06 Dec 2022 10:59

dad664npc wrote: 06 Dec 2022 10:49 First PCBs expected tomorrow

Looks a go-er! :thumbup:

BW

Steve · Post by **Steve** » 06 Dec 2022 15:37

dad664npc wrote: 04 Nov 2022 15:59 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!

sporniket · Post by **sporniket** » 07 Dec 2022 07:10

Following from afar, great work !

jfceklosky · Post by **jfceklosky** » 04 Jan 2023 04:28

The board looks great I would like to my hands on one to test out!

jfceklosky · Post by **jfceklosky** » 05 Jan 2023 00:37

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!

exxos's Atari, Amiga & retro forum

Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

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

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

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

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

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

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

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

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

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

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

Who is online