BEB@UNO.BITNET (Bruce Bettis) (03/10/88)
Since I'm not a hardware type in particular, I thought I would pass this
wierdness on to someone who might figure it out long before I will.
I have a 1 meg A500 with external floppy, Okidata 92 on the parallel port,
Prometheus 1200 modem on the serial port. Everything works fine with this
one bizarre exception:
On the printer, the "Select" (on/off line) LED will not light if the
modem is turned off. If I turn the modem on, it works as it should.
Huh?!?!?!?!?
Bruce
death before disclaimer (I know I'm paranoid, but am I paranoid enough?)
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<>Handle: Bruce Bettis USnail: University of New Orleans <>
<>BITnet: <BEB@UNO.BITNET> Computer Research Center <>
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<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>sterling@cbmvax.UUCP (Rick Sterling QA) (03/16/88)
In article <8803100550.AA01366@jade.berkeley.edu> BEB@UNO.BITNET (Bruce Bettis) writes: > Since I'm not a hardware type in particular, I thought I would pass this > wierdness on to someone who might figure it out long before I will. > > I have a 1 meg A500 with external floppy, Okidata 92 on the parallel port, > Prometheus 1200 modem on the serial port. Everything works fine with this > one bizarre exception: > > On the printer, the "Select" (on/off line) LED will not light if the > modem is turned off. If I turn the modem on, it works as it should. > > Huh?!?!?!?!? > Bruce > Try using a 7-wire RS-232 cable between your modem and the computer serial port. Serial port pin 22 ( RI ) is logically shared with parallel port pin 13 ( PSEL ). Opening the line to pin 22 in your current rs-232 cable should do the trick too. ============================================================================= Rick Sterling COMMODORE AMIGA TEST ENGINEERING Senior Test Engineer UUCP ...{allegra,ihnp4,rutgers}!cbmvax!sterling // /_ |\/||/_ /_ PHONE 215-431-9275 \X/ / \| ||\// \ ` CALM DOWN ! It's only 1's and 0's ! ' =============================================================================