RG>The was never any made.. this was another of John Brown's (JBEE,PARSEC)
 RG>projects..  he took money in advance, despite the fact there were no
 RG>working units.. and finally after two years the project was dropped.
 RG>Some money was refunded, others are still waiting.. the latest
"rumour"
 RG>is that this zip board was to be replaced with a cartridge speedup
 RG>device.. as far as anyone is aware this is more of JB's hot air.
 
  Yeah well dont winge at me, I only heard a rumour that there 'used to be'
one. Obviously that wasnt quite right (: A shame, that would have really
kicked some butt. Imagine 14400 connects, multi-line bbs's on 64's.. the
possibilities are endless...
 Maybe I should build one (:
 
 RG>Both the VIC and SID chips are only capable of 1mhz operation.

 Yeah, I know. Thats the li’ūmitation. The sid chip shouldnt be a problem,
you just divide the clock signal to it down to 1 mhz , similar thing with
the 6526's, but the VIC chip accesses the ram 'inbetween' the cpu clock
ticks, and this would be a problem. 

 RG>The turbomaster CPU (4mhz) overcome this limitation in a very crude but
 RG>effective way by actually banking the CPU's in and out ! Essentially
 RG>the 4mhz CPU was doing all the processing, updating screen ram etc,
 RG>then it passed control back to the internal CPU for the the
"mundane"
 RG>tasks of actually outputting the data (well, thats the way I understand
 RG>it to work).
 
 Hmm, not much time left so I'll think about this (:
 
Errol

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