Thrashbarg
September 27th, 2006, 08:36 PM
Hi,
I've built an Intel 8080 based computer with lots of blinking lights and CP/M 2.2.
On the address bus I often see the contents of the BC register dimly, mainly when it's counting. I've looked in the datasheets and there doesn't appear to be anything that suggests the BC register is multiplexed with the address bus, but there it is.
It doesn't happen with the Z80 card (no surprise).
Is there any information about this? Having the contents of the BC register on the front panel would be useful.
Thanks
Thrashbarg.
I've built an Intel 8080 based computer with lots of blinking lights and CP/M 2.2.
On the address bus I often see the contents of the BC register dimly, mainly when it's counting. I've looked in the datasheets and there doesn't appear to be anything that suggests the BC register is multiplexed with the address bus, but there it is.
It doesn't happen with the Z80 card (no surprise).
Is there any information about this? Having the contents of the BC register on the front panel would be useful.
Thanks
Thrashbarg.