Possible to speed up I/O subsystem of 5150?

From: Hans Franke <Hans.Franke_at_siemens.com>
Date: Thu Dec 9 14:03:22 2004

Am 9 Dec 2004 11:46 meinte Eric Smith:
> Steve Thatcher wrote:
> > considering that the ATA-1 spec included 8 bit transfers from the
> > harddrive, I don't understand why no IDE drives that supported ATA-1 would
> > not work on a PC/XT (unless the DMA speed was the problem).

> I wasn't aware that 8-bit was included in ATA-1; I don't have a copy of
> ATA-1 or ATA-2. Was the 8-bit support mandatory or optional? In any
> case, it was certainly gone by ATA-3. I very much doubt that any ATA
> drive manufactured in the last 15 years has 8-bit support.

Well, original ATA was nothing more than a straight forward
adaption of the MFM controler - and that one was still good
for 8 Bit access. Also, there was never (at least in the beginning)
a formal Standard, so as usual everything was possible ...
just remember all the problems of Master/Slave combinations
from different vendors.

VCF Europa 6.0 am 30.April und 01.Mai 2005 in Muenchen
Received on Thu Dec 09 2004 - 14:03:22 GMT

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