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BeebEm - BBC Micro and Master 128 Emulator |
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Hard DisksBeebEm supports emulated SCSI and SASI hard disks. There are 4 10MB pre-formatted ADFS SCSI disk images in the discims directory (the scsi?.dat files). The disks can be used in Model B (need to add ADFS-1.30.rom to the ROM configuration), B Plus or Master 128 mode. To use the disk images enable hard drive emulation on the hardware menu and press A & F12 to boot in ADFS mode (ignore the error for drive 4 if in Master mode). The hard disks then appear as drives 0 to 3. Floppy disks can still be accessed as drives 4 and 5. There are some demo tunes in scsi0.dat which you can listen to with the PLAY program. There is also the sasi0.dat file which is a Torch Z80 hard disc image (see the Torch Z80 section). Note that you cannot load hard disk images using the File menu options. To use alternative hard disk image files you need to replace one of the existing scsi?.dat files. The scsi?.dsc file may also need changing to configure the size of the hard disk image. Bytes in the scsi?.dsc file used by BeebEm (with offsets starting at 0):
The number of 256 byte sectors in the hard disk image is calculated as: Sectors = heads * (cyclinders high byte * 256 + cyclinders low byte) * 33 |
Copyright © 2011 Mike Wyatt