This page will describe the CPS 8256 serial parallel interface in detail
It could be used to transfer files between the PCW 8256 / PCW 8512 and a PC.
KERMIT should be the best solution to transfer files. To get KERMIT-80 V4.08 for the PCW series, download this file.
Case view (upper side)
Case view (down side)
Additional piggyback PCB for -12V/+12V generation (side view)
Upper view of the piggyback PCB
HighRes picture from the component side here
HighRes picture from the layer side here
HighRes picture from the component side without ICs and without piggyback PCB (light) here
HighRes picture from the component side without ICs and without piggyback PCB (darker) here
NEW! Have received a circuit diagram, many thanks to the contributor !
This text file describes the Amstrad PCW expansion port signals.
And this is a possible solution to implement 2 serial interfaces with a Z80DART (excerpt):