Not sure what happened last time I sent this. I'll try again...
> The "serial" bus is actually a bastardised implementation of the IEEE-488
> bus, which CBM had used on the PET series. Data is transferred serially (at
> 300 baud) instead of in parallel, other than that I believe it's pretty much
> IEEE.
Are you _sure_ it's 300 baud? I thought it was 2400. We had a 20K byte load
module that took about a minute to load - this corresponds to a little over 300
_bytes_ per second. Same load module from tape took SEVEN minutes! No wonder
speed loaders and things were popular! (Typical disk speed loader used 2 of the
wires in the serial bus for data, doubling the throughput. May have used higher
baud rate as well - I never had problems with 4800 baud in software on a PET.)
Philip.
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Received on Thu Mar 16 2000 - 05:40:44 GMT