11 Nov
2007
11 Nov
'07
10:56 a.m.
I actually just dumped the 2708 EPROM on the Morrow board and the code bears
absolutely NO resemblance to the code in the instruction manual. It doesn't
even appear to do much I/O. I wonder if it's suffering from bit rot?
Does anyone have a dump of their EPROM that they can send me for comparison
purposes?
On 11/11/07 12:40 PM, "dwight elvey" <dkelvey at hotmail.com> wrote:
Rich
--
Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator
http://www.altair32.com
http://highgate.comm.sfu.ca/~rcini/classiccmp
From: rcini at optonline.net> > Good. The
Morrow controller then falls into the
same category in my mind as> the ComprPro Disk 1 with the added bonus of not
requiring mods to my IMSAI.> > Now the thousand-dollar question -- does
anyone have a suitable disk image I> could use?>
Hi
Does the controller have ROM on it? Often the image
on the disk has to match with the ROM. Sometimes
the ROM only has a minimum boot code and the disk
loads the rest of the disk code. Other times, the ROM
has all the disk code and the disk is just the rest of
CP/M that calls the ROM for disk access. Yet other
are mixed with patches in the disk code.
The exception is for a controller that does DMA and
self boots, like the Digital Systems drives( no ROM in
the system ).
Dwight
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