Jay Sage in The Computer Journal issue #35 presented a 
patch to change Wordstar CPM version 4 from a ZCPR3-type shell to 
a ZCPR2-type shell. This is much more functional for most users. 
Under a Z3-type shell "SD;WS" and "WS;SD" produce the same 
result(i.e. SD is invoked first followed by WS). Under a Z2-type 
shell the first command is invoked first followed by the second. 
Under a Z2-type shell, commands can follow WS on a multiple 
command line(and be executed following WS4) while a Z3-type shell 
does not permit this. 
     Jay's original patch used the MORPAT area of WS.COM for part 
of the code. For those already using the MORPAT area, code has 
been added to allow use of part of the EXTRA patch area in 
WS.COM. 
     Patches must be made to both WS.OVR and WS.COM. WS.OVR is 
too large to allow use MLOAD or a debugger for this task. 
Therefore the patch must be made "by hand" using ZPATCH. 
TCJMRPAT.WS contains the changes if you use MORPAT while 
TCJEXTRA.WS contains the changes if you use the beginning of 
EXTRA(see below if you use a different patch area). Print out the 
appropriate file with Wordstar and the bytes to change will be in 
bold print. 
     Enter "ZPATCH WS.OVR" from your command line. Use the "O" 
option to change the offset to 100h. Use the "A" option and enter 
3CBF. "E" to Edit. Now begin entering the hex numbers printed in 
bold type(using the appropriate patch listing, either TCJMRPAT or 
TCJEXTRA). The hex numbers should be entered EXACTLY in the order 
displayed as the listing was created by an SLR assembler set to 
list 16 bit numbers in physical rather than logical order.
IMPORTANT NOTE: After entering the number at 3CFF, enter 
^W(control-W) to save the changes! Then get to the next record by 
entering "." or ">". Reenter the Edit mode and enter the five 
remaining bytes for this area. Save the changes(^W).
     Change the address to 67B2 and enter Edit. Enter the 
remaining bytes for WS.OVR, save them and Quit Zpatch.
     The changes to WS.COM can most easily be made using MLOAD. 
Use the appropriate HEX file, either TCJMRPAT.HEX or 
TCJEXTRA.HEX. MLOAD WS.COM=WS.COM,TCJ????? will get you the 
patched WS.COM in a flash. Both the HEX files in the library were 
created with intpath(Internal Wordstart path) set to no. If you 
want an internal path(and most don't need it), assemble 
TCJWSPAT.Z80 with "intpath" set to yes, the path defined at 
"path0" and mload set to yes. 

     If you have already used part of EXTRA for one of your own 
WS4 patches, you need to enter a new value for "extra" in 
TCJWSPAT.Z80 giving the first available byte. You must have at 
least 128 bytes free in EXTRA for the patch. Assemble the file 
with "mload" set to no and generate a LST or PRN file. Only the 
byte pairs at 3CCF, 67BF, and 67B5 in the WS.OVR section will be 
different from those in TCJEXTRA.WS. Your assembler will 
undoubtedly print the byte pairs in logical not physical order so 
you will need to reverse the order of each pair as you use ZPATCH 
to enter them(e.g. address 091A should be entered as 1A 09). Don't
forget to set the Offset to 100. Next assemble TCJWSPAT.Z80 with 
"mload" set to yes. Overlay the resulting HEX file into WS.COM as 
described above.

     Don't fail to have back up copies of WS.COM and WS.OVR 
before you start any of this just in case you make a mistake and 
your reconfigured WS4 doesn't work as expected!!

Enjoy.

Biff Bueffel
23-NOV-89