Running WordStar 3 under Andy's Memotech Emulator, "MEMU"
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(http://www.nyangau.org/memu/memu.htm)



The screen shot shown on this page is WordStar 3 running under MEMU.

If WordStar is started using typical MEMU command line options :-

C:\Memu\memu -mon-win-big ws.COM

The WordStar opening banner is displayed correctly, but when the main program 
tries to start, MEMU exits with the message :-

"memu: BDOS open file: FCB EX should be zero"

For reference, CP/M BDOS System Calls are documented here:-
http://www.seasip.demon.co.uk/Cpm/bdos.html

BDOS function 15 (F_OPEN) - Open file shows that when using the CP/M BDOS "open file" 
call, the EX field in the FCB should be initialised to 0.

The MEMU error message shows that MEMU has detected that the the calling program
(in this case WordStar) has not correctly implemented the Open File call and the 
emulator exits. Andy has seen this "bug" in other CP/M programs and added a MEMU 
command line switch :-

	-cpm-open-hack 

to MEMU to tell it not to do this check.

Starting MEMU using :-

C:\Memu\memu -mon-win-big -cpm-open-hack ws.COM

Allows WordStar to run correctly under MEMU