19 Nov
2003
19 Nov
'03
4:30 a.m.
----- Original Message -----
From: "Bryan Pope" <bpope(a)wordstock.com>
To: <cctalk(a)classiccmp.org>
Sent: Tuesday, November 18, 2003 1:50 PM
Subject: Re: Processor OS List
If I'm not mistaken, Commodore DOS, or whatever it's called, lived on the
1541/1751/1851 disk drive itself. The BASIC interpreter in the
C64/VIC20/C128/whatever had commands that sent messages to the drive over
the serial "Drive" port. The drive would then interpret what you mean to do
and send the data back. Thus came the ROM disk accelerator upgrades, such as
JiffyDos (I think, long ago!) I'm not sure what processor the drive had,
probably another 6502 or equivalent, as they used to cost as much as the
Commmodore 64 itself.
And thusly J.C. Wren spake:
>
<snip>
Commodore DOS
(not sure of the name)
Contiki
1541 DOS
6510:
Commodore DOS
GEOS