Re: DOS 3.3 Nibble Encodingk!

[k_bouchard@csc32.enet.dec.com (My name is...)]

In article <2cttdv$b86@news.ysu.edu>, ag471@yfn.ysu.edu (Eric S. Ford) writes...
> 
>In a previous article, k_bouchard@csc32.enet.dec.com (My name is...) says:
> 
>>
>>In article <2cps59INNmqi@iraun1.ira.uka.de>, borchert@i50s19.ira.uka.de (Volker Borchert) writes...
>>>k_bouchard@csc32.enet.dec.com (My name is...) writes:
>>>|> Am I out in left field on this? All this verbage to explain something
>>>|> basic? I always thought that *any* computer boots from sector0-track0
>>>|> because [...]
>>> 
>>>Wrong. My Z80 machines boot from track $17, sector $3.
>>
>>I guess I was thinking of older computers that had dedicated disk controllers
>>with track/sector registers and no built in ROM. I guess if a peripheral card
>>has some built-in ROM,anything's possible after a power-up.
> 
>If it's an Apple II, it boots using the slot 6 ROM, not the CP/M card ROM.  If
>it's an Apple II, it boots track 0, sector 0 for every 'floppy' (5.25 variety)
>If it finds a CP/M disk (i.e. if the info on S0/T0 sends it looking for a CP/M
>card, then that card's ROM may take over and finish the boot sequence by 
>looking for whatever track/sector it wants.
> 
> 
>-- 
>Eric S. Ford    ag471@yfn.ysu.edu



Sorry but I wasn't even thinking about MICROCOMPUTERS when I made the original
comment. I must've been living in the past!

Ken