Re: 90x0

Re: 90x0

Date: Tue, 28 Apr 2009 16:35:49 +0200
Message-ID: <>
Hallo Anders,

> Perhaps the IEEE protocol transfers data at a higher rate, so one 1-2 MHz 
> 6502 wouldn't quite keep up with both reading from the disk, decoding and 
> send it upstream?

This makes sense but is contradicted by the existance of the 2031.

> 'Cause I suppose it is not possible to e.g. format drive #0 and load from 
> drive #1 at the same time?

If I format a disk on my 8250 and use the OPEN and CLOSE command in 
one line, I'm sure I cannot give it another command until the drive 
has executed the CLOSE instruction. So that is a certain negative.
But at this moment I have no access to my 8296D so I cannot test it. 

Pure theoretically: I can place six different jobs in the job queue 
and I don't see any reason why the 1541 cannot excute them on the 
same time. Even if they conflict with each other. For example 
writing two different buffers to the same sector. The CPU cannot 
know that they conflict. That it doesn't make sense, that's 
different cook. 
Remark: the above is an opinion, which means I'm not 100% sure about 
it. But nice to discuss IMHO as it can lead to interesting things :)

BTW, the car was OK.

   / __|__
  / /  |_/     Groetjes, Ruud Baltissen
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Received on 2009-04-28 16:43:04

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