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| builderpages:plasmo:simple80:build_cpm3 [2025/03/15 13:52] – Revision from 2025-03-15 | builderpages:plasmo:simple80:build_cpm3 [2026/06/15 13:11] (current) – external edit 127.0.0.1 | ||
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| + | /* Imported from Wayback Machine | ||
| + | | ||
| + | | ||
| + | | ||
| + | */ | ||
| + | |||
| + | ====== Procedures for Assembling and Installing non-banked CPM3 for Simple80 ====== | ||
| + | |||
| + | The CP/M3 distribution files are compressed with arj.exe. Upload cpm3.arj to Simple80 using XMODEM: | ||
| + | |||
| + | //xmodem cpm3.arj /r// | ||
| + | |||
| + | decompress with unarj.com: | ||
| + | |||
| + | //unarj e cpm3// | ||
| + | |||
| + | CP/M3 is now installed on the CF disk. | ||
| + | |||
| + | To install the CPM3 loader, send CPMLDR.HEX in Simple80 monitor and type ' | ||
| + | |||
| + | ---- | ||
| + | |||
| + | ==== Rebuilding CP/M 3 BIOS ==== | ||
| + | |||
| + | There are two programs associated with CP/M3 BIOS, cbios3 and scb. [[http:// | ||
| + | |||
| + | //zmac –rel cbios3// | ||
| + | |||
| + | //zmac –rel scb// | ||
| + | |||
| + | The resulting relocatable outputs, cbios3.rel and scb.rel are uploaded to Simple80 via XMODEMl | ||
| + | |||
| + | //xmodem cbios3.rel /r// | ||
| + | |||
| + | //xmodem scb.rel /r// | ||
| + | |||
| + | //link bios3[os]=cbios3, | ||
| + | |||
| + | Generate an updated cpm3.sys using gencpm.com | ||
| + | |||
| + | gencpm: | ||
| + | |||
| + | set to no banked | ||
| + | |||
| + | N to double allocation vector | ||
| + | |||
| + | N to hashing for drive A/B/C/D | ||
| + | |||
| + | Y to overlay data buffer and directory buffer for A/B/C/D | ||
| + | |||
| + | also share buffers with drive A | ||
| + | |||
| + | ---- | ||
| + | |||
| + | ==== Rebuilding CPMLDR ==== | ||
| + | |||
| + | CPMLDR is a barebone disk operating system specifically for loading CP/M. Like CP/M, it also needs a corresponding BIOS to interface to specific hardware. The BIOS is ' | ||
| + | |||
| + | assemble ldrbios with zmac, | ||
| + | |||
| + | //zmac –rel ldrbios// | ||
| + | |||
| + | xmodem ldrbios.rel to CP/M environment | ||
| + | |||
| + | //xmodem ldrbios.rel /r// | ||
| + | |||
| + | Then link ldrbios with cpmldr to higher address such as 0x1100 to avoid conflicting with loading CP/M's CCP | ||
| + | |||
| + | //link cpmldr[l1100]=cpmldr, | ||
| + | |||
| + | xmodem the resulting cpmldr.com to PC | ||
| + | |||
| + | //xmodem cpmldr.com /s// | ||
| + | |||
| + | convert it to Intel hex format with offset of 0x1100 | ||
| + | |||
| + | //bin2hex /o0x1100 cpmldr.com cpmldr.hex// | ||
| + | |||
| + | Send cpmldr.hex to Simple80 and use monitor command ' | ||
