Re: More Pics of OEM PET - Malvern 8296 (hi-res)

From: Nicolas Welte (
Date: 2006-10-08 10:20:49

Hallo André,

-------- Original-Nachricht --------
Datum: Sat, 07 Oct 2006 22:09:37 +0200
Von: "André Fachat" <>
> - I find it interesting that the disk drive uses two 6502 instead 
>   of a 6502 and a 6504, but I have to check with the schematics
>   of the other disk drives.

It looks like a normal SFD1001 controller board without modifications. The adaptor board for the 6530 is also standard on all SFD1001 that I have seen so far. The 8250LP controller has a similar adaptor board, but mechanically different. All 8x50 series drives (including the SFD) have two 6502 CPUs instead of the 6502/6504 combo of the lower density x040 drives. I don't think there was a technical reason, maybe only availability of the chip.

the drive mechanism also looks like a standard SFD1001 unit. Probably one of the many power supplies in the machine is also the original SFD supply.


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