To apply the patches change to the directory under wich you unpacked
the z80pack software, usually your home directory.
Then use the command patch -p0 <patch_file.diff to apply a patch.
Patches should be applied in order to avoid problems, patchlevel
protection is not used.

Release	Patch	Description
1.8	1	Minor cosmetic bugfix in usage()
1.13	1	Adds Intel hex loader to z80sim, included in later releases
1.14	1	Fixes uninitialized pointer in z80sim hex loader
1.14	2	Improves the clock circuit for usage with QP/M
1.17	1	Corrects front panel LED status while RESET in upper position
1.17	2	Missing front panel and 8080 bus control in one instruction
1.17	3	Fixes H flag in CPDR/CPIR instructions


The MP/M 2 XIOS is broken in release 1.8 and release 1.9, banking
doesn't work correct. Replace with bios-source/bnkxios.mac and rebuild
the system. Not needed for later releases.

The DRI macro assembler RMAC included on all MP/M disks up to release
1.14 has problems under MP/M to properly write a symbol table file.
Replace with rmac.com, this version comes from MP/M distribution disks
and does work under MP/M. The included binary came from CP/M 3 distribution
disks, has the same release number, but is different. Looks like there
are several different RMAC 1.1 versions, probably patched with DDT.