smdev@csustan.UUCP (Scott Hazen Mueller) (11/15/86)
I "just happen" to have this antiquated-but-still-servicable IBM serial port
card in my collection of random hardware. I was wondering if this could be
used to add a second serial port to my 6300 - I've got three (!!!) RS232
devices hanging off of the one port, and I'd like to go to 6 :->. Seriously,
though, does anyone know what the jumper settings are to use this beastie
as a second comm port, and if it will work in my pc?
Thanx 2 million (inflation, ya know...)
\scott
--
Scott Hazen Mueller lll-crg!csustan!smdev
City of Turlock work: (209) 668-5590 -or- 5628
901 South Walnut Avenue home: (209) 527-1203
Turlock, CA 95380 <Insert pithy saying here...>psfales@ihlpl.UUCP (Peter Fales) (11/18/86)
> I "just happen" to have this antiquated-but-still-servicable IBM serial port > card in my collection of random hardware. I was wondering if this could be > used to add a second serial port to my 6300 - I've got three (!!!) RS232 > devices hanging off of the one port, and I'd like to go to 6 :->. Seriously, > though, does anyone know what the jumper settings are to use this beastie > as a second comm port, and if it will work in my pc? > Thanx 2 million (inflation, ya know...) > \scott I added an IBM compatible serial port as the second port on my 6300. Since it came from a third party vendor, I don't know how much it looks like the real IBM animal, but it took some very minor solder surgery (add one jumper) to get it to work. Details follow: The board actually supports two serial ports. Port A is connected to the DB-25 that comes out the back of the system. Port B is designed to be brought out on a cable. The switches allow port A to be addressed either as COM1 or an "alternate address" and port B as either COM2 or another "alternate address." They never thought of the case where port A would be used as COM2, but this was remedied by soldering a jumper from the COM2 chip select on port B to the chip select on port A and setting the dip switches to this did not cause a conflict. The existing dip switches allowed the appropriate interrupt request lines to be selected. I can supply more details, but unless your board is exactly like mine, you probably need a schematic of the serial board to make it work. Peter Fales ihnp4!ihlpl!psfales