this is a re-post as I was unable to get any help on other forums. I have designed and built a simple Z80 computer system with 32K RAM, Z80B at 4mhz, 32K ROM, and a UART. The only problem with it is that the system doesn't seem to work. So, I am asking to have somebody peer-review my code and schematics.
org 0x0000 uart_init: ld a, 0x80 out (0x03), a ld a, 12 out(0x00), a ld a, 00 out(0x01), a ld a, 0x03 out(0x03),a uart_out: in a, (0x05) bit 5, a jp z, uart_out ld a, 0x41 out (0x00), a jp uart_out