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Credit to Jose Luis for discovering this bug and bringing it to my attention. The fix is a small patch on top of the patches previously applied from Jon Saxton. See the ZPM3 directory in Sources for more information.
63 lines
2.4 KiB
Plaintext
63 lines
2.4 KiB
Plaintext
This is a generic ZPM3 adaptation for RomWBW.
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There are two ways to launch ZPM3. First, you can run the command
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CPMLDR from a CP/M 2.2 or Z-System command line. Alternatively, you
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boot directly into ZPM3 by choosing the ZPM3 disk from the RomWBW
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loader prompt. The ZPM3 disk must be bootable in this case.
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You may notice that there is a ZPMLDR application on the hard disk
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image. This application is equivalent to CPMLDR. It originally
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had some issues that prevented it from booting RomWBW properly,
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but those issues are now resolved (I think). Either ZPMLDR or CPMLDR
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can be used to launch ZPM3.
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I have not found a way to make ZPM3 start up with any drive other
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than A: as the system drive. So, during the load process, the boot
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drive and drive A: are "swapped" so that the boot drive is always
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drive A:. Use the ASSIGN command after starting ZPM3 to see how the
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drives get mapped.
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Per ZPM3 standard, files are distributed across different user areas
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depending on their usage. Normal applications are in user 15. Help
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files in user 10. Configuration files in user 14.
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In addition to the applications provided in the ZPM3 distribution, the
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normal CP/M 3 files are included in user area 15. A few typical ZCPR
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utility programs are also included in user area 15:
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- ALIAS
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- ARUNZ
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- ERASE
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- HELPC (named ZHELP)
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- LBREXT
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- SALIAS
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- SETPATH
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- VERRROR
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- VLU
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- ZCNFG
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- ERASE (named ZERASE)
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- ZEX
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- ZFILER
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- ZP
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- SHOW (named ZSHOW)
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- ZXD
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- EDITNDR
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- SAVENDR
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- SDZ
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It is a bit confusing, but the ZPM3 system file is called CPM3.SYS.
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This is the ZPM3 default configuration and I guess it is done this
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way to maximize compatibility with CP/M 3. You will notice that the
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startup banner will indicate ZPM3.
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In 2015, Jon Saxton released a patched version of ZPM3. The changes
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are documented in ZPM3FIX.TXT in the RomWBW distribution in the
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Source/ZPM3 directory. RomWBW uses the patched version of
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ZPM3. However, Jose Luis discovered that named directories do not
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work properly with these patches (see RomWBW GitHub Issue #324). I have
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subsequenty added a small patch to correct this. The original
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unpatched copies of RESBDOS.SPR and BNKBDOS.SPR are included in the
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RomWBW build directory for ZPM3 as RESBDOS.SPR.bak and
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BNKBDOS.SPR.bak. If you want to revert to the unpatched release of
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ZPM3, just overlay RESBDOS.SPR and BNKBDOS.SPR with the .bak variants
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and regenerate RomWBW. |