indra@brahms.amd.com (Indra Singhal) (10/23/90)
I have tried everything... (that I could think of...) On downloads, I
repeatedly get Bad CRC or subpacket length errors at 17408 bytes into
the file and close multiples. I have modified the buffers, CTS during
Write settings and anything else that I could think of... 17408 bytes...
everytime.
config: AST/Premium 286, 10MHz, Micropolis 28ms (70Mb) disk, TB+ 19200
baud modem talking to same, Qmodem 4.1b, 16550 UART FIFO enabled.
Download buffer sizes tried: 8, 80 and 240 blocks.
Error occurs even if I set serial line at 9600 with dataconn at 19200.
Ideas? Explanaions?
--
iNDRA | indra@amd.com or {ames apple uunet}!amd!indra
| (Indra Singhal) (408) 749-5445; Advanced Micro Devices
| MS 167; Box 3453; 901, Thompson Pl., Sunnyvale, CA 94088cec@cup.portal.com (Cerafin E Castillo) (10/25/90)
Indra,
Remember, the TELEBIT is a half-duplex (adaptive-duplex)
modem in PEP mode. If Qmodem is looking for ACKs to determine
data integrity, this may be the cause of the problem. The 16550s
in your system work well with RTS/CTS (hardware) flow control,
but I would double check that you are runnign this way (S58=2)
and that your software knows how to handle it. Try setting
S58=0 (no flow control) to see if this may be the problem.
Also, try S50=3 to do a V.22bis (2400-full-duplex) file transfer
to see if this is the problem. Good Luck!
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