Changes

* In case a Dobbertin Harddisc is also used you can't change its drive letters (D, E, F, G) as they are hard coded in the Dobbertin driver. Use the HDMGR utility to assign other available drive letters to your IDE drive, images or partitions. If you use the same numbers for your IDE media then the corresponding HD20 partitions will be unavailable under CP/M.

==How it works==

Upon computer power-up the HDCPM ROM will be initialized and will inform you of the presence of a compatible interface and RTC. Two bytes of RAM will be reserved for storing the interface type and [[M4 Board]] ROM number (if found). The boot loader can be started by executing one of the following commands:

|HDCPM (no TIME function support) or |HDCPMT (TIME function support)<br />

Alternatively it can be started by holding down the Tab key (no TIME function support) or Shift+Tab (TIME function support), during power-up.<br />

HDCPM can be started by running the HDCPM.BIN file from floppy drive or mass storage.<br />