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-
- Programs : FIXCOM2.COM for adding Communications Port 2
- FIXCOM3.COM for adding Communications Port 3
- FIXCOM4.COM for adding Communications Port 4
-
- Problem : The IBM Model 30/286 does not update its ROM BIOS device
- vector at 40:00 with the appropriate communications port
- address to allow the Practical Peripherals internal modems
- to be seen by software using ROM BIOS device calls.
-
- CAUTION : Practical Peripherals is supplying this as an aid to
- Model 30/286 Users and can not be held responsible for
- the use or support of this patch.
-
- This program patch is being offered in AS IS condition
- and no further modifications will be made.
-
- Description :
-
- This is a ROM BIOS direct write program that loads the device
- address vector at 40:00 with the appropriate PORT address.
-
- COM 2 = 02F8
- COM 3 = 03E8
- COM 4 = 02E8
-
- The User must determine which communications port to use and
- select the correct FIXCOM_.COM to enter the appropriate port
- address into the device vector.
-
- Such a write would be valid only until the system is rebooted.
-
- As a patch for the problem, the appropiate FIXCOM_.COM could be
- included in your AUTOEXEC.BAT for automatic reinitialization of
- the device vector.
-
- Example :
-
- The following is an example of the device vector at 40:00, showing
- a device only at 03F8 which is port 1.
-
- -D40:00
- 0040:0000 F8 03 00 00 00 00 00 00-78 03 00 00 00 00 00 00 ........x.......
- 0040:0010 2F 44 00 80 02 02 00 40-00 00 30 00 30 00 20 39 /D.....@..0.0. 9
-
- After the FIXCOM2.COM had been run, the device vector should show :
-
- -D40:00
- 0040:0000 F8 03 F8 02 00 00 00 00-78 03 00 00 00 00 00 00 ........x.......
- 0040:0010 2F 44 00 80 02 02 00 40-00 00 30 00 30 00 20 39 /D.....@..0.0. 9
-
-