At 11:58 AM -0800 11/6/99, [EMAIL PROTECTED] wrote:
>Also, why do they have to
>be so bulky? I am seeing PC keyboards advertised all the time as being USB &
>PS2 compatible. They are no bigger than a regular keyboard, yet they have both
>USB & standard PS2 circuitry built in, accessed depending on which
>adapter they use.
Well, one source of bulk in such an adapter would be that you'd have
to have a power supply. USB is supposed to supply a small amount of
power to peripherals, but SCSI wasn't designed to do that. So the
converter would need a power brick or wall wart of some kind.
The circuitry wouldn't be all that large. However, the price might
not be that attractive. There is no single-chip SCSI to USB
converter, so the adapter would probably end up being a small
embedded computer with both USB and SCSI interfaces running some
software to translate between the two. That means many chips, and
likely a price well above $100. I would guess that alone is a reason
why you haven't seen such a converter yet; if it costs too much to
build the manufacturer probably won't be able to sell enough of them
to make it worthwhile.
Tim Seufert
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