User guide

136 | P a g e
NO PATCHING! Since CPU speed is measured and all pertinent timing constants calculated on each call to
the disk drivers, QSBIOS will even work with the new software switchable 4 MHz conversions now being
offered by several suppliers (Please read the disclaimer on 4 MHz operation at the end of this
document.)
• QSBIOS also contains the famous LLL "BIOS-80" drivers for the H-17 disk system, allowing use of any
combination of 40 track and 80 track single and double sided 5" drives with the standard H-17 controller,
providing up to 400K per disk while maintaining 100% compatibility with the standard 100K format. Also
supports reading of 40 track disks in 80 track drives.
• QSBIOS supports ALL Heath/Zenith disk formats for the H-17, H-37, and H-47, including "extended"
density for up to 1.25 megabytes per disk!
• QSPUTSYS is supplied to allow generation of additional CP/M systems via a boot loader to any match any
device.
• In addition, the famous CP/MUG "ZCPR" Z-80 CCP is provided for those who want to have it automatically
installed in the BIOS during the install procedure. The CP/M UG XDIR program is also supplied to provide
detailed directory listings showing file sizes, and free space remaining on disk.
• Includes QSFORMAT and QSASSIGN formatting and partition assignment utilities for formatting
partitions, and assigning a partition to a particular logical drive.
• Supports multiple Winchesters both via daisy chaining to the -computer host adapter or chaining off
the master Xebec controller.
 Up to four active CP/M partitions at one time.
• Expanded error messages have been provided for disk error messages and utility messages.