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Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)
Posted: 04 Nov 2022 15:59
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
Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)
Posted: 04 Nov 2022 16:35
by Badwolf
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
Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)
Posted: 04 Nov 2022 16:40
by Cyprian
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.
Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)
Posted: 09 Nov 2022 10:56
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
Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)
Posted: 06 Dec 2022 10:49
by dad664npc
First PCBs expected tomorrow
Atari_ST_HDD_EMULATOR.png
Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)
Posted: 06 Dec 2022 10:59
by Badwolf
dad664npc wrote: 06 Dec 2022 10:49
First PCBs expected tomorrow
Looks a go-er! :thumbup:
BW
Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)
Posted: 06 Dec 2022 15:37
by Steve
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!
Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)
Posted: 07 Dec 2022 07:10
by sporniket
Following from afar, great work !
Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)
Posted: 04 Jan 2023 04:28
by jfceklosky
The board looks great I would like to my hands on one to test out!
Re: Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)
Posted: 05 Jan 2023 00:37
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!