Technical data

Utility Software for MS-DOS
92 VIPA GmbH CP486 ⋅ 00/14
5.1.5.2 Example for Generating a FLASH-PROM Silicon Disk
Goal: On the base address C0 0000hex, an FLASH-PROM silicon disk with a capacity of
1MByte (consisting of four 256KByte FLASH-PROMs (2MBit FLASH-PROMs))
should be generated.
A silicon disk board with four 256KByte FLASH-PROMs (2MBit FLASH-PROMs) and two
512KByte SRAMs (4MBit SRAMs) is used. The base address of the FLASH-PROM disk is set to
C0 0000 hex and to a length of 1MB. The base address of the SRAM-disk is set to 80 0000 hex and
also to a length of 1 MB.
The system is booted from hard disk (drive C:). The programs SDROM.SYS, SDRAM.SYS,
FORMATSD.EXE and SDLOAD.EXE (in the subdirectory C:\SD) and a text editor are required for
the generation.
The following lines are input at the end into the file C:\CONFIG.SYS via the text editor:
DEVICE = C:\SD\SDRAM.SYS base=/80 size=/1024
DEVICE = C:\SD\SDROM.SYS base=/C0 size=/1024
The system is re-started by pressing at the same time the keys <CTRL>, <ALT> and <DEL>.
At the runup, the system outputs i.a. the following messages:
SILICON DISK installed as drive D: . Vx.y date
RAMDISK STARTED WITH ADDRESS 80 0000H
SILICON DISK installed as drive E: . Vx.y date
ROMDISK STARTED WITH ADDRESS C0 0000H
In drive D: (SRAM disk) a master for the program memory is generated. For this purpose, the
SRAM-disk must first be formatted by means of the following command:
SD\FORMATSD D: /D:32 /S
Following all the files required on the FLASH-PROM disk are copied to this drive D:. Thus, the
master for the FLASH-PROM disk generated and can also be tested. For this, the silicon disk must
be selected on base address 80 0000H in the Setup.