This modification of the v1.20 Acorn CP/M BIOS provides access to a CP/M
drive C: that can reside in an image file on any filing system and on any
drive. The image file is a standard 'MyZ80' (&19B) image file and can be
accessed with CPMFS on RISC OS or MyZ80 on DOS/Windows.
| HDBIOS.zip | 28K
| Hard Drive BIOS with sample hard drive disk image.
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| CPMHD.ssd | 18K
| Acorn CP/M system disk with Hard Drive BIOS already installed.
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| CPMHD.dsd | 20K
| Acorn CP/M system disk with Hard Drive BIOS already installed.
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| HDBIOS.src | 11K
| Source for Hard Drive BIOS (Z80 BBC BASIC).
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| READ.ME | 5K
| Documentation for Hard Drive BIOS.
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![[img]](../../../BBCBasic/img/cpm.gif)
The BBC Z80 CoProcessor can run CP/M, and usually uses up to two 400K floppy
disks. The version 2.00 Z80 MOS supplied with the Acorn Business Computer
can access a hard drive. Unfortunately, the system files required appear to
be lost, and the code fiddles directly with the SCSI hard drive hardware,
making it difficult to use other filing systems or hard drives.
Authored by J.G.Harston