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- The purpose of this program is to allow the addition of an extra
- communications port to IBM-family machines. This is a programmable
- port addressed as com3: andlocated at address 3e8h. It may be
- configured using the TERM.EXE program. Type TERM HELP for details.
-
-
- The existing IBM-supplied single communications port may be used in
- this application if installed multi-function boards are presently
- supplying COM1: and COM2:
-
- MODS to ASYNC BOARD to SUPPORT COM3:
- 1. Break trace A27 to U2-5
- 2. Connect A27 to U6-12
- 3. Connect U6-11 to U2-5
- 4. Connect U6-13 to +5Vdc. (U6-14)
- 5. Break trace from U15-6 to B25
- 6. Connect U15-6 to B4.
-
-
- Refer to IBM Technical Reference Personal Computer XT for above
- designations.
-
- These wiring changes should only be undertaken by personnel
- experienced and equipped with PC board tools and the techniques
- involved.
-
- Install async3.sys in the config.sys file as DEVICE=ASYNC3.SYS The new
- serial port will not appear in the port table located at Segment40:0
-
- This modification may be used with any software that allows you to
- specify either COM3: or port 3E8h.
-
- Direct inquiries to:
- Art Shulman,
- Box 850
- Waterford, Ontario, Canada.
- N0E 1Y0
-
- Telephone (519) 443-4321 after 6:00 Pm. EST.
-
-
-
- Files included: This file you are reading.
- ASYNC3.SYS
- TERM.EXE
-