I'd like to build an 80's type computer using the W65C816 CPU. If possible, I'd like to use a dedicated graphics chip, and would prefer to avoid going the FPGA route. Could anyone suggest what I should start looking for, or recommend any currently produced chips that might work? Sincere thanks in advance.
Designing and building a graphic card is complicated. Try to find an ISA based graphic card. It will be easy to interface with ISA hardware.
You can also use a Nokia LCD display with a SPI or 8080 bus. 8080 interface is quite simple to deal in the case of your CPU.