bubu, las respuesta de Mike:
' Hello Dani,
OUT refers to the CDP1802 OUT instruction. The cpu can communicate with
up to 7 devices. When the 1802 executes an OUT instruction the n-lines of
the 1802 are set to the device number and then a value from memory is
transferred to the device. All the CDP1800 series devices communicate with
the cpu using OUT instructions. For example, the CDP1869 (video controller
chip) expectes certain OUT instructions from the CDP1802 (cpu) in order to
set screen mode, setup character maps as well as placing characters onto the
screen.
I am willing to help you with your project, I have extensive 1802
programming knowledge as well as 1800 series hardware knowledge. Just let
me know what exactly you are trying to do and supply me with any pertinant
information and I will see what I can do to help you out.
Mike'