To build this program as supplied, you will need Virtual T (v1.7 or above)
and a functioning C compiler installed. (On Windows this is apparently mingw)

To completely build this program:
1. open z100asm/z100asm.prj in the Virtual T (v1.7)+ IDE:
    * Tools > Assembler/IDE
    * File > Open Project
    * Navigate the Open dialog to the .prj file
2. build the z100asm project
    * Project > Build
    * Note that the output window will show "Assembling... z100.asm" but gives no
      indication that it finished.
3. cd to the z100pkg directory and run ./make.sh (or build.bat on Windows systems)

This produces the packaging program z100pkg.exe which can be used to package a
version 3 z-code game into blocks for use with REX.

*** NOTE ***
Depending on your version of REX, you may need to modify the value of namdir
in z100.asm before building.  Use
namdir equ 04400h
for older REX v4.8 and below

The default is
namdir equ 06400h
for REX v4.9 +

