For all older Kaypro's (2/83, 4/83, 10(w/o modem)) you have to have a 27C64 (8Kx8 ) EPROM to use the KayFreHD.
Also for the use of the KayPlus ROM without using the Hard drive feature, you need a EPROM adapter board.
Such a board i gave in production (10 items) and it arrive in about 10 days.
The board features the use of up to an 32Kx8 EPROM/EEPROM, so up to four ROM-images can be choosen by change the jumper setting.
The EPROM socket position on the Kaypro mainboards vary in position relative to the Z80 socket, so i don't combine it with the Z80-I/O adapter board.
Depending on the mainboard there are wire connections necessary, which grabs needed signals that not available from the original EPROM socket.
On Kaypro 2/83 one wire from U60 pin 14 and two wires from U59 pin 2&5.
On Kaypro 4/83 one wire from U60 pin 14 and one wire from U59 pin 5.
On Kaypro 10(old) one wire from U48 pin 10.
Frank
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