SCSI to SD/IDE

[maurice smulders]

Atmel  and ST have ARM chips which have an SD port (4bits) - and i
suspect there might be others...

Another option are the PIC24 chips. They have a 8/16 bit master slave
port which could be used for the SCSI interface... I think a device
could be made pretty small with a 28 pin MCU and a microSD socket...
Most likely a bit faster than an AVR solution... And small..

Maurice


On Sun, Dec 5, 2010 at 11:48 AM, Ethan Dicks <ethan.dicks at gmail.com> wrote:
> On 12/4/10, Phill Harvey-Smith <afra at aurigae.demon.co.uk> wrote:
>> The other thing I want this to support is 256 byte sectors as some old
>> machines rely on this, a feature which is supported by some of the early
>> SCSI/SASI to MFM/RLL boards but very few native SCSI drives, this would
>> be of perticular intrest to some of the Acorn 8 bit machines.
>
> PET as well - the D9060/D9090 drives had a SASI board and either a 5MB
> or 7.5MB MFM drive inside (Tandon TM602S or TM603S) that was presented
> as 256 byte blocks.  The slowness you describe probably wouldn't be a
> problem in this system since even the SASI interface on the "DOS
> board" is implemented programmatically in 6502 code.
>
> For the near term, it's convenient that one can drop in an ST225
> (formatted to 5MB) or an ST251 (formatted to 7.5MB), but a solid-state
> drive emulator would still be nice to have.
>
> -ethan
>



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