Early this summer I got a version of this board up and running CP/M off of 8" disks. My board may predate yours in that it is marked WINTECH SYSTEMS which later became WIN SYSTEMS. The part numbers appear to be the same though. The EPROM label was missing but it holds a simple monitor; probably that same as yours. As I remember the monitor does not print a sign-on banner or provide a help command.
View attachment 1268837
It will be a couple of days before I can gather up and make presentable the details I gathered; disassembly of EPROM and PLAs etc
Here are the monitor commands as I found. (1200,N,8,1)
; "A" - Arithmetic ?
;
; A <x> <y>
;
; Prints x+y x-y
;
; ex. a 2000 F
; prints
; 200F 1FF1
; "B" - Boot from floppy
;
; Read sector 1 from track 0 to 0x0080 then jump to 0x0080.
; A single density sector loads 128 bytes and a double density
; sector loads 512 bytes.
; "C" - Copy memory
;
; C <start> <end> <dest>
; "D" - Dump memory
;
; d <start addr> <end addr>
; d <start>
; d
; "F" - Fill memory
;
; F <start> <end> <data>
; "G" - Go
;
; Transfer control to specified address
;
; G <addr>
; "H" - Load hex records
; "I" - Read I/O port
;
; I <port>
; CR reads next port
; - reads previous port
; "M" - Memory examine/modify
; "O" - Write I/O port
;
; O <port> <value>
; "T" - Test memory
;
; T <start addr> <end addr>