michaelk@copper.MDP.TEK.COM (Michael D. Kersenbrock) (08/02/89)
A DTK Hex I/O card, like many other cards, has room for a second 8250 chip and a pair of RS232 interface chips. The manual is silent, however, about the pinout of the ten-square-pin connector. Does anyone know the pinout of that connector -- like "which RS232 signals are on which pin"? Thanks in advance (sounds so trite, but what can I say?)..... -- Mike Kersenbrock Tektronix Microprocessor Development Products michaelk@copper.MDP.TEK.COM Aloha, Oregon
Howard.Spindel@p8.f14.n105.z1.FIDONET.ORG (Howard Spindel) (08/05/89)
> From: michaelk@copper.MDP.TEK.COM (Michael D. Kersenbrock) > Date: 1 Aug 89 18:24:44 GMT > Organization: Tektronix Inc., Beaverton, Or. > Message-ID: <3374@copper.MDP.TEK.COM> > Newsgroups: comp.sys.ibm.pc > > A DTK Hex I/O card, like many other cards, has room for a > second 8250 > chip and a pair of RS232 interface chips. The manual is > silent, however, > about the pinout of the ten-square-pin connector. Does > anyone know > the pinout of that connector -- like "which RS232 signals > are on which pin"? > > Thanks in advance (sounds so trite, but what can I > say?)..... > > > -- > Mike Kersenbrock > Tektronix Microprocessor Development Products > michaelk@copper.MDP.TEK.COM > Aloha, Oregon Most of these boards are set up so that you just run a ribbon cable to a squeeze on type DB-25 connector. If there are less pins on the header on the circuit board than on the DB-25 align the pin 1 designations. Don't know for sure if the DTK board is this way but all of the others I have seen are. -- Howard Spindel - via FidoNet node 1:105/14 UUCP: ...!{uunet!oresoft, tektronix!reed}!busker!14.8!Howard.Spindel ARPA: Howard.Spindel@p8.f14.n105.z1.FIDONET.ORG
leonard@bucket.UUCP (Leonard Erickson) (08/05/89)
michaelk@copper.MDP.TEK.COM (Michael D. Kersenbrock) writes:
<A DTK Hex I/O card, like many other cards, has room for a second 8250
<chip and a pair of RS232 interface chips. The manual is silent, however,
<about the pinout of the ten-square-pin connector. Does anyone know
<the pinout of that connector -- like "which RS232 signals are on which pin"?
They map directly to a "standard" 9-pin D-shell connector. The pinout of
*that* was standardized by the AT (trans. I don't have it handy)
But just wire them straight to a 9-pin connector and it should work.
--
Leonard Erickson ...!tektronix!reed!percival!bucket!leonard
CIS: [70465,203]
"I'm all in favor of keeping dangerous weapons out of the hands of fools.
Let's start with typewriters." -- Solomon Shortrogers@pavo.SRC.Honeywell.COM (Brynn Rogers) (08/07/89)
In article <1601@bucket.UUCP> leonard@bucket.UUCP (Leonard Erickson) writes: <michaelk@copper.MDP.TEK.COM (Michael D. Kersenbrock) writes: <<A DTK Hex I/O card, like many other cards, has room for a second 8250 <<chip and a pair of RS232 interface chips. The manual is silent, however, <<about the pinout of the ten-square-pin connector. Does anyone know <<the pinout of that connector -- like "which RS232 signals are on which pin"? <They map directly to a "standard" 9-pin D-shell connector. The pinout of <*that* was standardized by the AT (trans. I don't have it handy) <But just wire them straight to a 9-pin connector and it should work. Sorry, I am pretty sure this is not that simple because I made one of these for my DTK serial port. I ohmed all the pins out and made up 3 conversion tables and my setup actually worked the first time ( amazing after three translations). I will open my machine tonight and get the pinout of what I have there that works. It is possible that I have a non-standerd 9 -pin to ribbon cable, but I will check it out. (it is molded in plastic so I can't see.) Brynn Rogers Honeywell S&RC rogers@src.honeywell.com work 612-782-7577 home 874-7737
rogers@mandrake.SRC.Honeywell.COM (Brynn Rogers) (08/07/89)
In article <1601@bucket.UUCP> leonard@bucket.UUCP (Leonard Erickson) writes: <michaelk@copper.MDP.TEK.COM (Michael D. Kersenbrock) writes: <<A DTK Hex I/O card, like many other cards, has room for a second 8250 <<chip and a pair of RS232 interface chips. The manual is silent, however, <<about the pinout of the ten-square-pin connector. Does anyone know <<the pinout of that connector -- like "which RS232 signals are on which pin"? <They map directly to a "standard" 9-pin D-shell connector. The pinout of <*that* was standardized by the AT (trans. I don't have it handy) <But just wire them straight to a 9-pin connector and it should work. Here is the pinout for my serial expansion that I got with my DTK. The manual that came with it says it is a KW-509 made by KOUWEI electric. This may or may not be the same as a DTK serial port, so check it out. (of course the manual has nothing usefull in it like this pinout which I got by ohming it out) 10-pin header 9 pin DB shell ( male ) -------------- ----------------- 1 5 2 3 3 2 4 7 5 NC 6 8 7 6 8 4 9 9 10 NC Notes: pin 1 of the 9-pin DB is not connected., it is actually chassis ground. pin 1 of the 10-pin header is towards the edge of the board. Brynn Rogers Honeywell S&RC rogers@src.honeywell.com work 612-782-7577 home 874-7737
michaelk@copper.MDP.TEK.COM (Michael D. Kersenbrock) (08/17/89)
> ><A DTK Hex I/O card, like many other cards, has room for a second 8250 ><chip and a pair of RS232 interface chips. The manual is silent, however, ><about the pinout of the ten-square-pin connector. Does anyone know ><the pinout of that connector -- like "which RS232 signals are on which pin"? > >They map directly to a "standard" 9-pin D-shell connector. The pinout of >*that* was standardized by the AT (trans. I don't have it handy) > >But just wire them straight to a 9-pin connector and it should work. >-- >Leonard Erickson ...!tektronix!reed!percival!bucket!leonard >CIS: [70465,203] >"I'm all in favor of keeping dangerous weapons out of the hands of fools. >Let's start with typewriters." -- Solomon Short Thank you to all who answered. Some went through quite a bit of effort to help. The straight-through answer (AT-style) is what I thought of first, and it didn't work. I suspected, there must be some other "standard", so I asked the net before having to ohm-out the board to see where things went. The straight-though answer was very close. One very important pin is different though. Ground is "supposed" to be on pin-5, but on this DTK card (Hex I/O), ground is on pin-10, and pin-5 is a no-connect. :-) I had to make the insulation-displacement connector have 8 consecutive wires, then shift the 9th wire over one "place". Alternatively I could have used a 10-conductor cable. (I was modifying a "bought" pre-made cable that didn't work -- it was wired "straight through"). Sigh -- the trivial simple things seem to take up more time than the complicated things..... -- Mike Kersenbrock Tektronix Microprocessor Development Products michaelk@copper.MDP.TEK.COM Aloha, Oregon