6502 SBC Computer v3

6502 based SBC Most of the design from Grant searle's original design. This version has been extended by me.

I have Added a jumper to allow 256k/512k EPROM/EEPROM giving access to four pages of ROM with a single jumper, also re-connected the RTS line to aid with hardware connection to a PC.

I also had issues with getting the Xtal to work with the LS series, so I adjusted the 2k2 resistors and switched to using HCT series. In theory this would also help with using a 65c02 chip.

The circuit layout was created by me with improved silk screen markings to help make sure things like the FTDI are connected the right way!

A 40-way edge connector was added to allow connection to the CZ-Bus backplane and expansion cards. With the female connector you can use a single card directly in the board or connect to a backplane and use multiple cards and seperate power supply.