<br />
====The HDMGR.COM utility====
This is the Hard Disk Manager utility.<br />
You can use this utility to get information about your hard disk geometry, disk image files, partitions and boot sector. You have to use this utility to format a hard disk, disk image file or partition to CP/M format or manipulate the boot sector of the hard disk and/or transfer an .EMS system file to the reserved track of the hard disk.<br />
The boot sector contains information about the CP/M disk drive letters, start-up drive and console colour scheme. All those properties can be changed with HDMGR.COM.<br />
HDMGR will perform a fragmentation test of the discovered CP/M hard disk image files uppon execution.<br />
You can't use this utility to re-partition your hard disk or make a new CP/M image file or manipulate a file system other than CP/M.<br />
The HDMGR.COM utility is self explanatory. Just run it from the CP/M command prompt.<br />
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====The RTC.COM utility====
If you need the 470 bytes of RAM that the integrated RTC driver occupies then you can make use of the RTC.COM utility in order to keep CP/M date and time updated.<br />
You can synchronize the date and time of CP/M Plus with the RTC by running 'RTC -G' manually or via your PROFILE.SUB<br />
You can also set your RTC to the current CP/M date and time by running 'RTC -S'<br />
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====Error messages====
Hard disk errors:<br />
* ''*** No mass storage found ***''
No compatible mass storage interface can be found.
* ''ERROR: DISK I/O''
I/O error occurred during the last read/write operation.
Your hard disk might be defect or the USB disk is not enabled.
* ''ERROR: INVALID BOOT SECTOR''
No FAT or CP/M boot sector was found in a not partitioned hard disk.
* ''ERROR: INVALID FILE SYSTEM''
The first partition in a partitioned hard disk is not a FAT or CP/M-80
one.
* ''ERROR: INVALID SECTOR SIZE''
The hard disk used has a sector size not equal to 512 bytes.
* ''ERROR: CPMDSK01.IMG NOT FOUND''
The CP/M image file named CPMDSK01.IMG can't be found in the FAT
formatted hard disk or partition.
* ''ERROR: CP/M SYSTEM FILE NOT FOUND''
The .EMS CP/M system file can't be found in the system track of your
CP/M partition or image file.
* ''ERROR: CPMDSK01.IMG IS FRAGMENTED''
The first CP/M image file is fragmented, the system won't mount it.
* ''ERROR: CPMDSK01.IMG HAS WRONG LENGTH''
The first CP/M image file has wrong length, the system won't mount it.
* ''ERROR: CPMDSK01.IMG IS NOT FORMATTED''
The first CP/M image file is not formatted to CP/M-80 format, the
system won't mount it. Use the HDMGR.COM utility to format it.
* ''ERROR: INCOMPATIBLE EMS FILE''
The .EMS system file that was loaded from the system track is not
compatible with HDCPM.
RTC errors:<br />
* ''*** Battery depleted ***''
The RTC battery is depleted. The RTC driver will continue to operate
normally but the readings are not reliable. Replace the RTC battery.