So, spend a few hours desoldering a Konami-1 bootleg replacement, and then find that someone else has done most of the work of making a schematic already.
The board itself
Seems there are still some questions regarding the extra pins (Konami-1 is 42 pins rather than 40 like a 6809e) and interrupts. Maybe some examining of boards with builtin Konami-1 replacements like Junofirst and Gyrus is necessary.
As far as I know Circus Chalie and Ropeman use this daughter board too.
2 thoughts on “Konami-1 cpu replacement pcb”
It seems Konami-1 custom CPU has been already reversed onto a FPGA replacement board :
This board differs from the schematic on the UKVAC thread in that there are dual 74LS74s. There is a bit more to the daughterboard since Q is fed into the D-type FF and feeds one PAL… looks like this is a bit more complete.