sethcohn@alchemy.tcnet.ithaca.ny.us (seth cohn) (03/18/91)
ok, HOW can you do Hardware handshaking on a mac plus? (or on a Classic, LC, or Si) None of these has Pin 7 (known as GPi or general Purpose input) hooked up (apple got cheap and figured it wasn't neccessary) thus you can hook up hardware handshaking but you lose carrier detect (which is not acceptable!!!) Can you use pin 8 - which is the extra receive pin for carrier detect if the software is right???? if not, any other way??? thanks in advance, Seth Seth Cohn, Service Tech. 607-273-2815 voice 607-272-7002 BBS All things posted are opinions by me, of me, for me, or to me. And another thing..........I'm not sure you're real.
russotto@eng.umd.edu (Matthew T. Russotto) (03/18/91)
In article <78Ryy2w162w@alchemy.tcnet.ithaca.ny.us> sethcohn@alchemy.tcnet.ithaca.ny.us (seth cohn) writes: >ok, HOW can you do Hardware handshaking on a mac plus? >(or on a Classic, LC, or Si) None of these has Pin 7 >(known as GPi or general Purpose input) hooked up >(apple got cheap and figured it wasn't neccessary) >thus you can hook up hardware handshaking but you lose carrier detect >(which is not acceptable!!!) >Can you use pin 8 - which is the extra receive pin >for carrier detect if the software is right???? >if not, any other way??? No, you can't use the RxD+ line. What software do you have that gets CD on Pin 7? And why would you need CD if you aren't doing a BBS? BTW, the SE, SE/30, IIx, II, IIcx, IIfx, and IIci all have pin 7-- are you sure the Classic, LC, and SI don't? -- Matthew T. Russotto russotto@eng.umd.edu russotto@wam.umd.edu .sig under construction, like the rest of this campus. I mine 600 wells, and whaddo I get? Another day older and deeper in debt! --- Saddam Hussein.
sethcohn@alchemy.tcnet.ithaca.ny.us (seth cohn) (03/19/91)
russotto@eng.umd.edu (Matthew T. Russotto) writes: > In article <78Ryy2w162w@alchemy.tcnet.ithaca.ny.us> sethcohn@alchemy.tcnet.it > >ok, HOW can you do Hardware handshaking on a mac plus? > >(or on a Classic, LC, or Si) None of these has Pin 7 > >(known as GPi or general Purpose input) hooked up > >(apple got cheap and figured it wasn't neccessary) > >thus you can hook up hardware handshaking but you lose carrier detect > >(which is not acceptable!!!) > >Can you use pin 8 - which is the extra receive pin > >for carrier detect if the software is right???? > >if not, any other way??? > > No, you can't use the RxD+ line. What software do you have that gets CD on > Pin 7? And why would you need CD if you aren't doing a BBS? > BTW, the SE, SE/30, IIx, II, IIcx, IIfx, and IIci all have pin 7-- > are you sure the Classic, LC, and SI don't? > -- > Matthew T. Russotto russotto@eng.umd.edu russotto@wam.umd.edu > I mine 600 wells, and whaddo I get? Another day older and deeper in debt! 1) Yes, I AM running a bbs, so I DO need carrier detect (sorry that wasn't clear in the first post) 2) Yes, Pin 7 is used for carrier detect. WHY can't you use pin 8? it's currently grounded. 3) according to APPLE specs (as of the latest service tech manual i just got - "Not connected on Macintosh Plus, classic, LC, or IISi" Hmm, anybody got any ideas? Handshaking is important for REAL speed I'm going to be using a US Robotics HST DS with v32bis. Seth Your Friendly Tech, what the heck. Seth Cohn, Service Tech. 607-273-2815 voice 607-272-7002 BBS All things posted are opinions by me, of me, for me, or to me. And another thing..........I'm not sure you're real.
russotto@eng.umd.edu (Matthew T. Russotto) (03/20/91)
In article <D381y3w162w@alchemy.tcnet.ithaca.ny.us> sethcohn@alchemy.tcnet.ithaca.ny.us (seth cohn) writes: > >2) Yes, Pin 7 is used for carrier detect. WHY can't you use pin 8? > it's currently grounded. Because Pin 8 (if it is RxD+ -- I don't have a manual here to tell me) is one half of a differential reciever. Your mac can see whether it is getting a '0' or a '1' by checking to see whether the voltage is higher on the RxD+ line or RxD- line. They are not independant inputs. >3) according to APPLE specs (as of the latest service tech manual i just >got - "Not connected on Macintosh Plus, classic, LC, or IISi" >Hmm, anybody got any ideas? Handshaking is important for REAL speed >I'm going to be using a US Robotics HST DS with v32bis. Yep, you aren't going to be getting any 3200 cps transfers. If you can modify the program, you can change it to use the CTS line on the OTHER port. If you can't, you are SOL. -- Matthew T. Russotto russotto@eng.umd.edu russotto@wam.umd.edu .sig under construction, like the rest of this campus.
Mark.Hollingsworth@f1.n354.z1.FIDONET.ORG (Mark Hollingsworth) (03/25/91)
Seth Cohn writes; >ok, HOW can you do Hardware handshaking on a mac plus? >(or on a Classic, LC, or Si) None of these has Pin 7 >(known as GPi or general Purpose input) hooked up >(apple got cheap and figured it wasn't neccessary) thus >you can hook up hardware handshaking but you lose >carrier detect (which is not acceptable!!!) Can you use >pin 8 - which is the extra receive pin for carrier >detect if the software is right???? if not, any other >way??? >thanks in advance, Seth If you are not running a BBS, you really don't need the carrier dectect. If you are, then you are correct (at least as far as I have been able to find out) you can't do both on the plus. Here is the proper pin diagram for Hardware Handshake cable: Mac DB25 1----------------------4 2----------------------5 3----------------------2 4----------------------7 5----------------------3 6-------------unconnected 7------------- "" 8--------------- "" Hardware Handshake modem cable If you are using a US Robotics HST modem, then use the following NRam settings: USRobotics Courier 14400 HST NRAM Settings... DIAL=TONE B1 F1 M1 X7 BAUD=38400 PARITY=N WORDLEN=8 &A3 &B1 &G0 &H1 &I0 &J0 &K3 &L0 &M4 &N0 &P0 &R2 &S0 &X0 &Y1 S02=043 S03=013 S04=010 S05=008 S06=002 S07=060 S08=002 S09=006 S10=007 S11=070 S12=050 S13=000 S15=000 S19=002 S21=010 S22=017 S23=019 S24=150 S26=000 S27=000 S28=008 S38=000 Dip switch settings 1--down 2--up 3---down 4--up 5--down 6--down 7--up 8--down 9--down 10--up -- Mark Hollingsworth - via FidoNet node 1:105/14 UUCP: ...!{uunet, reed}!glacier!busker!354!1!Mark.Hollingsworth INTERNET: Mark.Hollingsworth@f1.n354.z1.FIDONET.ORG