This is a simple backplane PCB allowing up
to 5 PCBs to share the Data and Address lines of the HobbyPCB 65C02 SBC.
It has the same pinout as the SBC, and Floppy IF board so allows easy
connection to each other. There is a 2k x 8 (64 rows by 32 columns) VDU
PCB in development, and an extension RAM PCB which uses the same pin
layout as the other boards so connecting is made very easy.
The backplane PCB has provision for a reset push-button, as the SBC's reset might be obscured by an additional board, an on/off switch. Space for an RS232 Dongle, and a 5V PSU connector.
#### Why did you make it?
I have to be honest, I got fed up with having lots of Dupont cables all over the place.!!
#### What makes it special?
This PCB allows the expansion of the 65C02 with a variety of add-on PCBs. They can be plugged in in any slot, there is no set position as each board picks up the Address, Data and Control Bus as needed.
|When the SBC is plugged in, backplane Pins are:(from left to right)
|D7 D6 D5 D4 D3 D2 D1 D0 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 CPUCLK PHI2 CPURW CPURESET RAMRW ROMOE ACIACLK /2MHZCLK Gnd RX TX 5v.
|(c) 2021,2022,2023 Paul Bartlett