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- I have NMODEM running on FALCON, FeatherNet and WildCat! BBS systems! It
- has been found to work on AT/XT class machines under MS-DOS 3.3/4.01,
- OS/2, DR-DOS 5.0, PC-MOS 4.1, Concurrent DOS-XM 6.2, and Concurrent DOS-386
- 3.0. My machines all run PHOENIX 2.52 BIOS for XT class, the AT-CLONE has
- an early (1987) PHOENIX BIOS licenced to Tandy (Same as PHOENIX 3.06), and
- my 386-25 has AWARD 3.11 BIOS. NMODEM has been tested with TELIX 3.11/3.12,
- QMODEM 4.2 and GT1550. All of my modems are EVEREX EV-940 models with
- ROCKWELL Chip set.
-
- If you experience problems with NMODEM.EXE try NMTERM.EXE! If the
- terminal version works then you must suspect the way the Comm or
- BBS program you are using does a shell to DOS as whats causing NMODEM
- to malfunction.
-
- Malfunctions could be caused by one or more of the following:
-
- 1. TSR interference.
-
- 2. Multiple Comm ports at same address and/or interrupt.
- - This problem can be a real killer since most diganostic
- programs will NOT even detect this problem. Some programs will
- function in this environment and others won't. I know for
- a fact that NMODEM has worked in a variation of this problem
- on THE COMM CENTER, but DOS, Hardware, BIOS,etc all contribute
- to troubles in this area. I suggest going to COM3: if your
- your modem will support COM3:. Most problems involve COM1 &
- COM2:. I finally had to switch THE COMM CENTER to eliminate
- interference from a buggy EMS card!
-
- 3. Buggy UART in port.(many buggy UARTS are out there!!)
-
- 4. Bad UART interface built into NMODEM.
-
- 5. Incorrect switch settings on modem and/or incorrect init string
- for the modem.
-
- 6. Passing wrong port # to NMODEM.
-
- 7. Passing wrong data to NMODEM for port# or file.
-
- 8. Early versions of DOS 4.01 had a major bug which can cause very
- strange inconsistent operational problems. All 1988 versions were
- bad! Early 1989 versions were bad! After April/May 1989 a patch
- was issued for MS-DOS 4.01 which seems to finally cleaned it up.
- IBM has released a replacement for PC-DOS 4.01 which may or may
- NOT correct the problem. The MS-DOS 4.01 patch program is on
- PYSMATIC (408)-992-0372 for download.
-
- 9. NMODEM tries to be very straight forward and NOT use any tricks
- or undocumented features of DOS. Video cards and some ROM BIOS
- versions have undocumented side effects and/or operational defects
- which can cause unsuspected problems. If your ROM BIOS is NOT
- PHOENIX, AWARD, AMI or IBM then it could be causing problems. Early
- versions of ALL BIOSs have bugs which were resolved in newer
- upgrades. If your BIOS is an earlier version it could have some
- side effects.
-
-
- The multitude of variations of hardware, software, operating systems
- and BIOS types in IBM "compatable" machines makes it impossible to
- test for everything. I have made an effort to establish some basis
- to believe it will function, but cannot guarantee it will work!
-
- NOTE: "Hayes Compatible" does NOT mean the mdoem is 100% to the
- "standard"!! The EVEREX modems are NOT 100% Hayes compatable
- "thank heavens", however they do respond basically as a
- "HAYES" would with many powerful extensions to the features
- and command set. All modems are "compatable" in varying ways
- and thus will interact differently with any program.
-
-