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A project log for 1802 CPU for RC2014

An RCA1802 Processor Card For RC2014

EtchedPixelsEtchedPixels 03/30/2020 at 16:310 Comments

It lives.

Currently it's executing the first test program from ROM

    .abs
    .org    0

start:
    ldi    #0xFF
    phi    6
    ldi    #0x80
    plo    6
    ldi    #0xFF
    plo    8
loop:
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    nop
    dec    7
    glo    7
    bnz    loop
    dec    8
    glo    8
    str    6
    br    loop

which is cycling LEDs on the debug card.

The configuration I am using at this point is a 32K/32K RAM/ROM card with ROM low, the 1802 CPU card, and an SC129 GPIO/Debug card. It's got a 16x50 UART plugged but in but I've yet to try and set that up.


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