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Old 21st May 2019, 10:55 am   #72
JohnBHanson
Heptode
 
Join Date: Aug 2009
Location: Worthing, Sussex, UK.
Posts: 661
Default Re: Gemini 80-Bus System

I think sysgen or movcpm is/are broken wrt writing to disk.

For updating the bios, you need to assemble multi.mac at the correct origin for you cp/m size
and then write the output file to the bios sectors on track 0

To assemble you need to look at the aseg/org/phase directives eg for 64k cpm use

aseg
org 0100h
.phase 0f300

then build with the commands
m80 =multi
l80 multi,multi/n/e

Then use disked to located the start of the bios on the boot tracks
then use the file set and file read commands to copy multi.com to the boot sectors where the bios is

Hope that helps somewhat
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