clh333
Veteran Member
I have been rebuilding a K4/83 and have progressed to the point that it powers on, boots, resets, sees and actuates all the drives and keyboard keys and displays characters on the screen. The board is a PC81-240, the character ROM is 81-146 and the BIOS ROM is 81-232.
The K4 had been modified with an Advent add-on co-processor board - which was broken - and I was suspect of the BIOS ROM contents, so in the diagnostic phase I erased and re-flashed the BIOS EPROM, a Hitachi 2732. My boot disk is one left over from a K II and so when the machine boots it identifies CP/M 2.2 Kaypro II. Obviously the next step is to find the right version of Kaypro CP/M for use with the double-sided drives.
The question is: Which one is the right one? Dunfield's site has images of Kaypro CP/M disks for Kaypro 4 and for 3/83. There may be another repository and/or another version of the OS that would be a better fit. Does anyone have a suggestion about how to proceed?
Thanks for your replies,
-CH-
The K4 had been modified with an Advent add-on co-processor board - which was broken - and I was suspect of the BIOS ROM contents, so in the diagnostic phase I erased and re-flashed the BIOS EPROM, a Hitachi 2732. My boot disk is one left over from a K II and so when the machine boots it identifies CP/M 2.2 Kaypro II. Obviously the next step is to find the right version of Kaypro CP/M for use with the double-sided drives.
The question is: Which one is the right one? Dunfield's site has images of Kaypro CP/M disks for Kaypro 4 and for 3/83. There may be another repository and/or another version of the OS that would be a better fit. Does anyone have a suggestion about how to proceed?
Thanks for your replies,
-CH-