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- PROGRAM: ROMU.COM
-
- DESCRIPTION: A simple utility to create and maintain AT ROM image
- files including disk table and checksum changes.
-
- CONTACT: Keith P. Graham at PC Rockland BBS (914) 353-2157
-
- USAGE: ROMU.COM is initiated by entering ROMU at the dos
- prompt. ROMU has 3 menus.
-
- MENU 1. This menu provides several choices for a source of
- ROM data. The source can be the current AT ROM, or
- a file or files created by ROMU or similar utility.
- The source of data can be either 32K (27128 type ROMS)
- or 64k (27256 type ROMS). If loading information from
- a file, the data can be a complete BIOS image or a
- split image which corresponds to the high and low ROM
- chips.
-
- MENU 2. After a source is selected it is possible to display
- and alter the disk table, calculate the checksum or
- force the checksum to 0. A 32K ROM image can be
- be converted to 64K by padding the low 32k with zeroes.
- The file can be written out as either a BIOS image
- or two split rom images.
-
- MENU 3. This menu is shown when the the user chooses to display
- and modify the disk table entries. The normal disk
- table address in an AT is fixed at f000:e401. ROMU
- makes the assumption that this address holds true for
- all AT roms. IBM AT's have only 15 table entries which
- can be changed. Some AT clones and 386 clones have up
- to 64 table entries. ROMU will display all 64 entries
- even if they are not valid. The invalid entries will
- have odd characters while the valid entries will have
- only decimal characters. Do not change entires beyond
- the known limit of your bios.
-
- When changing an entry you will be shown the current
- value and asked for a replacement. If you press the
- return without making an entry the existing entry will
- be used by default.
-
- When you have finished making all entries for a disk type
- you will be shown the table entry and asked if it is
- acceptable. If you enter "Y" the bios image will be
- updated.
-
- NOTE: There was a type in the source of the first ROMU I
- sent up which broke the reading of split files and the
- writing of 64k files. Its fixed now.
-