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- This is a program to allow the SPERRY PC/IT to recognize internal modems and
- ASYNC ports not recognized by the PC. It will set the equipment table to
- indicate that the system has two serial ports installed at the standard COM1
- and COM2 addresses. The internal async port corresponding to the installed
- device must be disabled as described in the system installation guide.
-
- The following is a listing of the FIXSER.COM program included:
-
- MOV AX,0040 ; seg adrs of equipment table
- MOV DS,AX ; to DS reg
- MOV AX,03F8 ; adrs of COM1
- MOV [0000],AX ; to 0040:0000 (equip table)
- MOV AX,02F8 ; adrs of COM2
- MOV [0002],AX ; to 0040:0002 (equip table)
- MOV AL,[0011] ; byte containing number of com ports installed
- AND AL,FD ; set bit 1 to zero
- OR AL,04 ; and bit 2 to one
- MOV [0011],AL ; put back into equip table 0040:0011
- RET ; done
-
- I hope this patch will help anyone with a SPERRY IT who has trouble with an
- internal modem as I did. I include FIXSER.COM in my AUTOEXEC.BAT file.
- Not all software will have problems without the patch (CROSSTALK works fine),
- but any program that checks the equipment table will not find certain add on
- async devices without the patch.
- The fix was provided to me by SPERRY customer engineering.
-
- Jeremy S. Nichols 11/15/86
-
-
- You can find Jeremy and other top-notch programmers and techies
- at Terrapin Station BBS -- 2400/1200 - 24 hours a day
- 612/623-0152 -- a BBS for programmers!
- Additional lines available for subscribers.