C70:info-cpm (07/16/82)
>From Bomberger@Office-2 Thu Jul 15 20:19:01 1982
Well my case where I don't boot the Morrow supplied BIOS is similar to
trying to run some other system. I am ,of course, using
the software in the ROM as I dont ever read the morrow disk. Any simple boot
procedure is possible with any old disk layout since there is
no particular dependency built into the controller.
However,...The Rom software seems to have a peculiar bug that causes a 1k block
of memory beyond the advertized 2k of the controller to become contaminated.
I cannot locate anyting in the code to support this assumption that it is the
software. It could be a hardware problem but seems to be restricted to the
single 1k block of memory immediately above the morrow RAM. Anyone
every heard of such a problem with the Morrow?.
The interace to the ROM disk routines seems easy enough. To boot a strange
system requires only a 128 byte cold boot routine that is loaded into the
controller RAM by the BOOT subroutine. The standard entry point for
this boot is described in the manual. From then on it is the designer's
game
Peace and thanks for any help.
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