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CP/M-86 - Wikipedia, the free encyclopedia (591 words) |
 | One applies to the whole system and is usually displayed at startup; the other applies to the BDOS kernel. |
| CP/M-86 for the IBM Personal Computer Version 1.1 (BDOS 2.2) - March 1983 - Hard drive support was added. |
| This is the same BDOS used in DOS Plus. |
| CP/M 3 Prg's Guide - BDOS System Interface (10105 words) |
| During file write operations, the BDOS updates the memory copy of the FCB to record the allocation of data to the file, and at the termination of file processing, the Close File function permanently records this information on disk. |
| The BDOS returns nonzero values in register H to identify a physical or extended error if the BDOS Error Mode is in one of the return modes. |
| When the BDOS is in return error mode, and it detects a physical error for these functions, it returns to the calling program with registers A, H, and L all set to 255. |
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