Changes

You can read more about the development of the application here:<br />

HDCPM is compatible and can be used together with the [[Dobbertin Harddisc]].<br />

Although every effort has been made to ensure that HDCPM works properly, there is a chance of hard disk data corruption in case of a stray bug in the code. So make a backup of your hard disk before installing and trying out the ROM. I'll not be held responsible for any data loss or damage to your hard disk.<br />

** [[SYMBiFACE II]]

** [[X-Mass]]

** [[uIDE 16]] (base address = &FEF0)

** [[M4 Board]]

** [https://www.cpcwiki.eu/forum/amstrad-cpc-hardware/usifac-iimake-your-pc-or-usb-stick-an-hdd-for-amstrad-access-dsk-and-many-more!/ USIfAC II]

** [http://www.tmtlogic.com/ Symbiface III]

* Compatible storage device with enough free space to accommodate the desirable CP/M hard disk configuration.

* Floppy disk drive for initialization of the file system.

* Read the .EMS file from the reserved track and store it in RAM just as the normal CP/M Plus boot loader does.

* Move the top of TPA and transfer the hard disk driver, RTC driver (in case of |HDCPMT) and initialize the XDPH, DPB, ALV of the mounted hard disks to the memory area just below the normal BDOS base address. The newly inserted code will be handled by CP/M as if it was a normal RSX.

* Patch the SCB in order to change the startup/default drive.

* Patch the drive table records to reassign drive letters for floppy drives 1 and 2, hard disks 1,2,3,4 (if any) and ram drive if [[Dk'tronics memory expansion]] or [[Dobbertin Memory Expansion]] driver is present.

* Patch the CP/M console with the desired colour scheme.

* Patch the system message.

===Using the ROM===

* Install the HDCPM ROM in a free ROM slot of your ROM box.

* Power on your Amstrad. You should see the ROM initialization message: ''CP/M+ Hard Disk boot loader v1.04 (S2)''. The type of interface found will be shown inside the parentheses:<br />

** (S2): [[SYMBiFACE II]] compatible interface

** (US): [https://www.cpcwiki.eu/forum/amstrad-cpc-hardware/usifac-iimake-your-pc-or-usb-stick-an-hdd-for-amstrad-access-dsk-and-many-more!/ USIfAC II]

** (S3): [http://www.tmtlogic.com/ Symbiface III]

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===Using the binary===

* Use your original CP/M Plus system disk set to Boot CP/M Plus.

* Use the provided HDMGR.COM utility in order to format the disk image or partition and transfer the .EMS file to the reserved track. Change the start-up drive letter to that of your first CP/M hard disk.

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 />

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 />

==Error messages==

===Hard disk errors===

* ''*** No mass storage found ***''

* ''ERROR: DISK I/O''

Your hard disk might be defect or the USB disk is not enabled.

HDCPM.DOC: various additions and corrections.<br />

|| [[Media:hdcpm106.dsk|hdcpm106.dsk]]

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