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- This version of Z33IF contains a number of significant changes from the
- previous release. Do not try to use the programs without reading this file.
-
- First, Howard Goldstein has fixed a couple of bugs in the operation of the
- file tests. The earlier version failed to keep track properly of the
- default logged directory and thus under some circumstances would look for a
- file in the wrong directory.
-
- These files have been assembled in three different versions: IF14.COM,
- IF14.CIM, and IF14.4OM. The latter two are for operation with NZCOM and
- Z3PLUS systems. Because those versions of Z System allow returning to
- standard CP/M, it is important for files to have protection to prevent their
- attempted operation under CP/M. The IF14.CIM file has been assembled for
- operation at 8000H. To prevent its operation at 100H, it contains a special
- header routine that verifies its load address. This protection code makes
- the file a little bit longer but allows it to work with Z33 and the standard
- Z33FCP.
-
- The IF14.4OM file is a type-4 program. It can be loaded only by Z34 and the
- Z34FCP. This version is protected by having the initial JP (jump)
- instruction replaced with a RST 0 instruction, which causes a warmboot. Z34
- and Z34FCP, which know how to load type-4 programs, make the necessary
- conversions in the code.
-