VERAULT
Veteran Member
So this thread is a spin off from the freHD for use on Kaypro thread. I was burning some kayplus roms to install on my kaypro 4/84 when none of the roms worked. When I tried them in another of my 4/84 computers the ROMS I made work fine. The only differences I can see on the boards are the one in question has u75 marked as SPARE and unpopulated. While the one that works with the new ROMS has u75 populated with a 74LS10. The kaypro that doesnt work also has several bodges and bridges under the board which look factory to me.
Pin 2 of the rom socket and pin 2 of the z80 have continuity. Can someone lend some advice as to why it wont take a 28 pin rom when the silkscreen on the board shows both sizes.
Mick
Pin 2 of the rom socket and pin 2 of the z80 have continuity. Can someone lend some advice as to why it wont take a 28 pin rom when the silkscreen on the board shows both sizes.
Mick