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- Path: lilith.uab.es!newsmgr
- From: s_0056@blues.uab.es (Maite Auladell)
- Newsgroups: comp.dcom.modems
- Subject: Doubled characters from modem -> CRC errors
- Date: Mon, 15 Apr 1996 22:51:30 GMT
- Organization: Universitat Autonoma de Barcelona
- Distribution: world
- Message-ID: <4kujoq$7bp@lilith.uab.es>
- NNTP-Posting-Host: blues.uab.es
- X-Newsreader: Forte Free Agent 1.0.82
-
- I had a lot of CRC errors with my internet connection so I put the
- modem in local analog loopback to check what was going on. The result
- is that every now and then I get some character doubled (i.e: if I
- send the modem 'Good bye' I get 'Good byye'). I tried all the speeds
- and all the possible com settings for the modem (com1,2,3,4
- irq3,4,5,7) and also removed the multi/io card that I use for the
- floppy controller and mouse. No luck. I thought I had a defective
- modem. But then, just to give it a try, I disconnected the CD/ROM
- drive and repeated the simple loopback test. It was ok. Tried it many
- times and always got it right. Then I went surfing for a while, and I
- got _NO_ crc errors (and a much more responsive connection). I
- reconnected the CD/ROM and the same problem arose. I
- also tryed to boot clean (i.e. not loading the CD/ROM driver) and to
- put the CD/ROM in the secondary IDE channel, with no luck. Now, if I
- want to use my modem, I have to disconnect the CD/ROM.
-
- The ingredients:
-
- - A no name Rockwell glue'n'go V34 internal fax/modem (now setup as
- COM3-IRQ7, but I tried all the other configurations)
-
- - A multi/io card with COM1(IRQ4), COM2(IRQ3), LPT1, FLOPPY, GAME and
- HD Controller (the HD controller is disabled)
-
- - An ATAPI MITSUMI FX400 quad speed CD/ROM Drive, now connected to the
- secondary IDE Channel of the MotherBoard.
-
- - A no name 486 motherboard with VESA/ISA/PCI Slots, integrated dual
- IDE/PCI controller, AMD 486 DX4/100 CPU, 8Mb RAM and fake cache chips.
- The Bios is an AMI with date 07/25/94.
-
- - A Trident SuperVga PCI Card (TGUI9440) with 1Mb RAM, Bios version
- A5.2 (67)
-
- - A Maxtor 7540AV Hard Disk (540Mb in Maxtor docs, but they really are
- 504)
-
- I'd like to leave the CD/ROM always connected (mostly because it's an
- internal model) so if is there someone out there who knows a solution
- out of changing the modem/CD-ROM, please tell me.
-
- Maite Auladell
-
-