TO:    Sysops running NUBYE and who use Richard Conn's CD.COM program
       ver. 2.3 to move from one named directory to another on
       ZCPR2/ZCMDXX systems.
FROM:  Joe Earls, Sysop of PC-FORUM, Columbus, GA  404-324-7391
DATE:  August 4, 1986
PROB:  System crashes and other unpredictable results when running the
       CD program while NUBYE is running.
CAUSE: The CD program uses the BDOS pointer to calculate where the entry
       point of ZCPR2 should be in memory, so that it can jump back into
       it.  However, when NUBYE is running it modifies the BDOS vector,
       causing CD to jump into the wrong place and causing horrible
       things to happen.
FIX:   I have prepared a modified version of CD 2.3, which I have named
       NUCD in order to avoid its confusion with the original.  NUCD
       obtains the address of ZCPR2 from a value you patch into the
       NUCD.COM file, instead of trying to calculate it from the BDOS
       vector.  To use NUCD.COM you absolutely MUST patch in this
       address.

       I have supplied in the LBR the NUCD.COM program, ready for you
       to patch in your ZCPR2 CCP address.  I have also furnished the
       NUCD.MAC and SYSLIB.REL source modules in case you wish to
       make other changes and assemble your own.

       When patching the NUCD.COM module, patch the address of the
       beginning of your ZCPR2 CCP area into the following locations:

            1AFH  Lo byte of address
            1B0H  Hi byte of address
 
       That's it.  Don't forget to GENINS in your own install parameters
       after you make the patch.