20 Oct
1998
20 Oct
'98
4:03 a.m.
Tony Duell wrote:
Does anyone have a list (or a URL) of the I/O ports on
the TRS-80 Model
4, both their addresses and what the bits in each port do?
I am particularly looking for info on the ports that control the CPU
speed, memory mapping and the video system.
Hi Tony,
Try this web site out, http://www.trade80.com/trs80/ it supports
many of the TRS-80 line of computers.. Should find what you want there, if
not I have a service manual for the TRS-80 Model III computer and perhaps
they use the same bus.. Hope this helps.. Phil...