Re: 1551 Test Demo

From: Larry Anderson (foxnhare_at_jps.net)
Date: 2000-05-24 01:44:48

I just bought a disk that was labeled "model 1551/1541 test/demo
diskette"  I would assume the image on funet is of the same disk,
(header TEST/DEMO 1/85) which is for both the 1541 and 1551...  :/

Richard Atkinson wrote:
> 
> On Tue, 23 May 2000, Bo Zimmerman wrote:
> 
> > I downloaded this off FUNET to take a look at it, and examining the
> > directory, a question almost immediately entered my mind:
> >
> > What are the C64/VIC-20 wedges on there for?  Heck, why is there ANY
> > C64/VIC-20 software on there?
> 
> This is interesting. Try disassembling the routines - perhaps they make
> accesses to hardware in the C64's I/O space. Commodore originally planned
> to make a fast disk drive system for the C64 before the 264 series came
> along and got it instead. The early C64 Programmers Reference Guides show
> $DExx reserved for the CP/M cartridge and $DFxx reserved for a fast
> (parallel) disk drive interface.
> 
> Is there anything at all different from the 1541 versions of these files?

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