Path: news.weeg.uiowa.edu!news.uiowa.edu!uunet!olivea!decwrl!csus.edu!netcom.com!tbc From: tbc@netcom.com (Mike Garvey) Newsgroups: comp.sys.apple2 Subject: Re: HELP: 9600bps modem won't work (2nd request) Message-ID: Date: 19 Aug 92 05:11:21 GMT References: <1992Aug12.060048.21300@cco.caltech.edu> <1992Aug13.052733.11609@nuscc.nus.sg> <1992Aug13.093716.27916@cco.caltech.edu> Organization: Netcom - Online Communication Services (408 241-9760 guest) Lines: 59 In a prior missive, toddpw@cco.caltech.edu (Todd P. Whitesel) eloquently scribed this stuff: >In Greg Schaefer's ProTERM v3.0 manual, the suggested wiring for an Apple >IIgs/IIc+ modem cable is (and it works -- I got ranges of 2690-3264 cps >downloading textfiles from the Hayes BBS with an Intel 14.4ex): > >Computer Port Modem Signal Name >(Male MINI DIN-8) (Male DB25) >3 2 TD (transmit data) >5 3 RD (receive data) >4 7 GND (signal ground) >Short 8 to 4 GND (signal ground) >2 5 CTS (clear to send) >1 4 RTS (ready to send) > Short 4 to 20 DTR (data terminal ready) >7 8 DCD (data carrier detect) > >NOTE: This cable requires that "short circuits" be placed in the cable. This >consists of creating a "Y" connection between the three pins. On the MINI >DIN-8 end, pins 4 and 8 should be connected to each other as well as to pin >7 of the DB25. On the DB 25 end, pins 4 and 20 should be connected to each >other as well as to pin 1 of the MINI DIN-8. This cable will work fine on the Apple IIGS but there are two important things to note. Shorting pin-8 and pin-4 of the DIN-8 to Signal Common (GND [sic]) is supposed to dampen out excessive electrical noise as per standard RS-422 to RS-232 conversion specs, which SHOULD result in more stable connections, less dropouts, etc. In practice, the opposite is often true, so if a user loses carrier frequently, he should consider removing the short and just tie 4 to 7. The only advantage of the DTR/RTS (4/20) short is if you wish to hangup the phone by dropping the DTR line. In any case, you should configure the modem to ignore the DTR signal (AT&D0, and/or a dip-switch) so the modem will accept commands independent of the DTR state. Really ancient modems might need a short between DTR/DSR (6/20) at the modem-end of the cable, in which case you probably DON'T want to tie this to RTS. The USRobotics modems are more flexible than most other high-speed modems in that you DON'T have to support RTS as long you have a reasonably fast computer (RTS traps for 'upload' overrun). You can then support DTR as usual (i.e. hangup when DTR is lowered) in software. Finally, a lot of Mac hardware handshaking cables DON'T support the DCD (GPi) connection on pin-7 because not all Macs support it. These cables will probably not be flexible enough to use with the GS and Apple II software. One such cable, is the cable being shipped with the Supra MacPack. Otherwise, it's identical to the above cable. (Wanders off mumbling something about summary: buy a cable from InSync) Be seeing you... -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- = The Black Cursor (c) & TM -=- Sysop: Valhalla -- an Ogg-Net BBS = = Internet: tbc@netcom.com -=- (415) 221-4370 300-14,400bps 8N1 = = GEnie: TBC "No sir, I don't like it." - The Ren and Stimpy Show = -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Newsgroups: comp.sys.apple2 Path: news.weeg.uiowa.edu!news.uiowa.edu!uunet!ukma!wupost!spool.mu.edu!umn.edu!csus.edu!netcom.com!tbc From: tbc@netcom.com (Mike Garvey) Subject: Re: ATTENTION high-speed modem users! Message-ID: <1992Nov14.214311.22536@netcom.com> Organization: Netcom - Online Communication Services (408 241-9760 guest) References: <1992Nov12.022902.16202@netcom.com> Date: Sat, 14 Nov 1992 21:43:11 GMT Lines: 58 In a prior missive, mdavis@crash.cts.com (Morgan Davis) eloquently scribed this stuff: >In <1992Nov12.022902.16202@netcom.com> tbc@netcom.com (Mike Garvey) writes: > >>Paul "The Oggman" Parkhurst says that the cable he mentioned in his "HST >>Speed" articles (described below) neatly sidesteps this problem with the >>CTS signal and the HSKi line; this cable basically uses the GPi line to >>support the CTS signal. Is it possible that more software (PT3, METAL, >>ProLine/ModemWorks, GNO's drivers) be modified to work with this cable? > >Its doubtful that ModemWorks (which ProLine uses) would be able to work >with this configuration because ModemWorks uses the Extended Firmware >routines in the Apple IIGS's serial interface. You'd basically have to >rewrite the ROMs to do this. On the other hand, I've not heard of any >ModemWorks-based systems having any trouble with hardware flow control. > >This may be because the IIGS firmware uses the CTS transition interrupt >rather than polling the CTS signal as do many programs that go right >to the metal in dealing with the 8530 directly. This is good information to know. I haven't been working with ModemWorks long enough yet to do exhaustive tests, but I will put it through its paces and not make any hasty conclusions. So your conclusion is that this is a software problem and that neither the cable (the InSync cable is the same one as the one you list in the ModemWorks manual), nor the motherboard 76LS32 at UC16 need be changed. Perhaps you can communicate this information with Greg Schaefer at InSync? For reference, here is the proposed cable design: IIGS (DIN-8) Modem (DB-25) ----------------------------- 1 (HSKo) ------> 20 (DTR) | --> 4 (RTS) 2 (HSKi) <------ 8 (DCD) 3 (TxD-) ------> 2 (TxD) 5 (RxD-) <------ 3 (RxD) 7 (GPi) <------ 5 (CTS) 4 (GND) <-----> 7 (GND) | 8 (RxD+) <-- Paul's cable doesn't have the extra connection of pin-1 to pin-4, and the extra connection of pin-8 to pin-7 (GS to modem in both cases). You would also set the "DCD Handshaking" option in the Conrtol Panel to "Yes". (Wanders off mumbling something about the Apple SSC has other, similar problems that I'll mention in a separate message) Be seeing you... -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- = The Black Cursor (c) & TM -=- Sysop: Valhalla -- an Ogg-Net BBS = = Internet: tbc@netcom.com -=- (415) 221-4370 300-14,400bps 8N1 = = GEnie: TBC "No sir, I don't like it." - The Ren and Stimpy Show = -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Newsgroups: comp.sys.apple2 Path: news.weeg.uiowa.edu!news.uiowa.edu!uunet!munnari.oz.au!spool.mu.edu!umn.edu!csus.edu!netcom.com!tbc From: tbc@netcom.com (Mike Garvey) Subject: Fast modems and the SSC Message-ID: <1992Nov14.220135.23211@netcom.com> Organization: Netcom - Online Communication Services (408 241-9760 guest) References: <01GR5CHJVLQAB7AW8E@RCNVMS.RCN.MASS.EDU> Date: Sat, 14 Nov 1992 22:01:35 GMT Lines: 70 Once again, I'm relaying information that Paul Parkhurst reported to me here. Paul has had problems using two 'mainstream' cable designs (in the GBBS and ModemWorks manuals) while writing a pair of high-speed modem drivers for GBBS as replacements for the stock Supra and HST drivers. Using either of these cables, whenever CTS would fall (the modem's transmit buffer was nearing capacity), data flow would pause normally, but when CTS would rise again and data flow would resume, invariably the first character sent at this point would be corrupted. Similar to his GS experiments, Paul found that using the DCD line for the CTS signal worked where other cables failed. The three cable designs are reproduced below for reference: Apple SSC to Modem (GBBS) SSC (DB-25) Modem (DB-25) ----------------------------- 2 (TxD) ------> 2 (TxD) 3 (RxD) <------ 3 (RxD) 4 (RTS) ------> 4 (RTS) 5 (CTS) <------ 5 (CTS) 7 (GND) <-----> 7 (GND) 6 (DSR) <------ 8 (DCD) 20 (DTR) ------> 20 (DTR) | 8 (DCD) --- Apple SSC to Modem (MW) SSC (DB-25) Modem (DB-25) ----------------------------- 2 (TxD) ------> 2 (TxD) 3 (RxD) <------ 3 (RxD) 4 (RTS) ------> 4 (RTS) 5 (CTS) <------ 5 (CTS) | 8 (DCD) <-- 7 (GND) <-----> 7 (GND) 6 (DSR) <------ 8 (DCD) 20 (DTR) ------> 20 (DTR) Apple SSC to Modem (Paul's) SSC (DB-25) Modem (DB-25) ----------------------------- 2 (TxD) ------> 2 (TxD) 3 (RxD) <------ 3 (RxD) 4 (RTS) ------> 4 (RTS) 8 (DCD) <------ 5 (CTS) 7 (GND) <-----> 7 (GND) 6 (DSR) <------ 8 (DCD) 20 (DTR) ------> 20 (DTR) | 5 (CTS) --- Comments are much welcomed. (Wanders off mumbling something about this is very interesting and equally confusing) Be seeing you... -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- = The Black Cursor (c) & TM -=- Sysop: Valhalla -- an Ogg-Net BBS = = Internet: tbc@netcom.com -=- (415) 221-4370 300-14,400bps 8N1 = = GEnie: TBC "No sir, I don't like it." - The Ren and Stimpy Show = -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Path: news.weeg.uiowa.edu!news.uiowa.edu!uunet!wupost!csus.edu!netcom.com!netcomsv!boo!uttsbbs!paul.parkhurst From: paul.parkhurst@uttsbbs.uucp (Paul Parkhurst) Newsgroups: comp.sys.apple2 Subject: IIGS MODEM PORT Message-ID: <911.61.uupcb@uttsbbs.uucp> Date: 18 Apr 93 01:44:00 GMT Distribution: world Organization: The Transfer Station BBS, Danville, CA - 510-837-4610/837-5591 Reply-To: paul.parkhurst@uttsbbs.uucp (Paul Parkhurst) Lines: 62 -> Can anyone give out the pin connections for an IIGS modem port. Can -> this port be used with a 'standard' hayes (yes an actual hayes) -> modem? If so which is a good comm program to get to use with it? Any -> and all help appreciated. -> -> Thanks -> Jim B. As someone mentioned, a standard "Mac to Hayes" cable should work just fine for any low-speed modems (I'm assuming you're talking about a Hayes Smartmodem 1200/2400). If you get a high-speed modem, you'll need a cable that supports handshaking. As for the pinouts of such a cable: GS Modem Port Modem (Male Mini DIN-8) (Male DB-25) ============================================== 1 (DTR) ------------ 20 (DTR) and 4 (RTS) 2 (HSKI) ------------------------- 8 (DCD) 3 (TX Data-) ------------------------- 2 (TX) 4 (GND) ------------------------- 7 (GND) 5 (RX Data-) ------------------------- 3 (RX) *7 (DCD/GPI) ------------------------- 5 (CTS) * This line is optional. If you use it, you can get handshaking with any software that uses the GS firmware by setting "DCD Handshaking" to "Yes" in the control panel. Pin-outs for the new handshake cable that packages like Proterm uses is as follows: GS Modem Port Modem (Male Mini DIN-8) (Male DB-25) ============================================== 1 (DTR) ------------ 20 (DTR) and 4 (RTS) 2 (HSKI) ------------------------- 5 (CTS) 3 (TX Data-) ------------------------- 2 (TX) 4 (GND) ------------------------- 7 (GND) 5 (RX Data-) ------------------------- 3 (RX) 7 (DCD/GPI) ------------------------- 8 (DCD) This new design departs from the tradition of using the DSR line for carrier detect. It uses pin 7 (not supported on some older Macs) for carrier detect, and the DSR line for handshaking. As for which telecom program to get, I'm the wrong person to ask! I'm prejudiced since I have one on the market. I sell ANSITerm, which might be something you'd want to look into. Proterm is the current big seller, however. If you want information on ANSITerm, you can give me a call at (510) 837-9098. Paul Parkhurst uttsbbs!paul.parkhurst@PacBell.COM ---- +------------------------------------------------------------------------+ | The Transfer Station BBS (510) 837-4610 & 837-5591 (V.32bis both lines)| | Danville, California, USA. 400+ MB Files & FREE public Internet Access | +------------------------------------------------------------------------+ Newsgroups: comp.sys.apple2.comm Path: news.weeg.uiowa.edu!news.uiowa.edu!hobbes.physics.uiowa.edu!math.ohio-state.edu!howland.reston.ans.net!spool.mu.edu!sgiblab!sgigate.sgi.com!olivea!decwrl!decwrl!netcomsv!netcom.com!kc From: kc@netcom.com (Dameon D. Welch) Subject: Re: Cable question Message-ID: Organization: Crisis? What Crisis? References: <2eo18i$fie@charm.magnus.acs.ohio-state.edu> <2ep4s3$gj6@charm.magnus.acs.ohio-state.edu> Date: Sun, 19 Dec 1993 06:02:00 GMT Lines: 29 In article <2ep4s3$gj6@charm.magnus.acs.ohio-state.edu>, Shane M Zatezalo wrote: [ Hardware Handshaking Cable for //gs ] | GS PORT CONNECTOR RS-232C CONNECTOR | (Male mini-8) (Male DB-25) | ----------------- ---------------- | Pin 1: HSKo ------------------> Pin 4: RTS GS Drops HSKo to have mdm stop | Pin 2: HSKi <------------------ Pin 5: CTS MDM Drops CTS to have GS stop | Pin 3: TxD- ------------------> Pin 2: TD | Pin 4: SG <-----------------> Pin 7: SG | Pin 5: RxD- <------------------ Pin 3: RD | Pin 6: TxD+ **NO CONNECTION** | Pin 7: GPi <------------------ Pin 8: DCD Carrier Detection using &C1 | Pin 8: RxD+ **NO CONNECTION** (NORMAL CARRIER DETECT!)^^^ Same as a Mac Hardware Handshaking Cable... But I've got a different problem -- I need one for my //e! Seems as though I can't use my 14.4k modem on my //e without character dropout (or the Supra 2400 Plus with the RTS/CTS driver in ProTERM). I just have a straight-thru serial cable -- nothing fancy. Is there a special cable I need or do I just need to throw some switches on the Super Serial Card to get it working? -- Dameon D. Welch, NH6TW | "The city lights shine seward swirling in a trance kc@netcom.com | Her eyes upon the water alone in her last dance." (Ask for PGP Key) | -- Alan Parsons Computer Science Major at | "Childhood's end your fantasies merge with harsh Santa Clara University | realities" -- Pink Floyd