Another disk imaging project
cisin at xenosoft.com
Mon Aug 15 20:04:24 CDT 2005
> >>>There are ISA adapters for PCMCIA. There are adapters to plug CF into
> >>>PCMCIA dlots.
> > There are, or at least WERE, 8 bit ISA PCMCIA adapters.
On Mon, 15 Aug 2005, Jim Leonard wrote:
> Recall any? I'm really looking for something like this.
I YOUSTA have an 8 bit ISA card with a PCMCIA slot on the back.
There was also an ISA card with a cable to a PCMCIA slot in a holder
that mounted in place of a 3.5" drive.
ISTR the name as being something like "DataBook Thin Card Drive".
The machine that it's in is not very conveniently accessible, but
I might be able to get at it in a few weeks. If so, I'll dig it
out, and confirm what it is.
One of the San Jose surplus places (Halted? Haltek? HSC?) used to carry
them, 15? years ago.
There were also some IDE PCMCIA interfaces. Dunno whether an 8 bit IDE
card would work with one of those.
> > That would certainly reduce the I/O bottleneck,
> > but 4.77 MHz will never be "fast".
> The speed of the CPU is irrelevant for my project; what I *do* need is a way to
> pump 200KB/s through the machine, and the WD 20MB MFM + controller is only
> giving me about 80KB-100KB. (interleave 3:1, adjusting it in either direction
> reduces throughput)
I remember some 16 bit ISA disk controllers that claimed to be able to
maintain a 1:1 interleave, but no 8 bit ones.
IIRC, Speedstor or Spinrite would do a test of different interleaves to
try to find the optimum.
Grumpy Ol' Fred cisin at xenosoft.com
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