123
Do not cancel the program with a reset. This might otherwise render
the computer inoperative since the 8105 may be deleted.
Appendix C: Silicon Disk
To use the on-board flash module on the PCM-4330 board to emulate a hard
disk drive (silicon disk) follow these steps:
BlOS-Requirements and CMOS-Settings
n
The BIOS version on the PCM-4330 board must be 1.0c or higher to support the
memory module.
n
To emulate a silicon disk, the 8105 extension requires that the memory area
in which the extension is started is available as Shadow-RAM.
n
The ROM extension is started in area CC00 — CFFF. Therefore, this segment
must be set to Shadow RAM in the setup menu (see page 23).
n
The emulation uses area D0000— D3FFF as a window to the memory module.
Consequently, no other program or driver may use this area. Additionally,
Shadow-RAM needs to be disabled for this segment.
n
To disable loading the 8105 extension, simply set the CMOS-RAM date to
the year 2099. If the year is set to 2098, only a part of the extension is loaded.
The modifications for INT 13 will not be loaded.
BIOS Extension Setup
To set up the 8105 extension, enter the following command at a DOS prompt:
flashcl -v = FlashBIOS.<ver>
<ver> indicates the current version of the 8105 extension.
Low Level Formatting
Before using the silicon disk it must first be initialized with the memcform pro-
gram. A signature and further parameters enable the 8105 extension to
identify and access the disk. A drive number needs to be assigned to the disk
before the formatting process:
n
Select values “0” to “9” for drive numbers 0x80 to 0x89 or values “A” to “F”
for drive numbers 0xFA to 0xFF.
n
If a drive number is selected which is smaller or equal to a number of an ex-
isting hard disk drive, the number of the hard disk drive is raised for INT 53.
n
Choose any drive number if no hard disk drive is installed in the system.
n
If value “0” (corresponding to drive number 0x80) is selected for the silicon
disk in a system with a hard disk drive, drive letter C: is assigned to the silicon
disk and letter D: to the hard disk. Value “F” swaps drive letter assignments
(letter C: for the hard disk drive and letter D: for the silicon disk).
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