💾 Archived View for mirrors.apple2.org.za › archive › apple.cabi.net › FAQs.and.INFO › CPUandMore › … captured on 2023-05-24 at 23:45:38.
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Path: news.uiowa.edu!news.physics.uiowa.edu!math.ohio-state.edu!howland.reston.ans.net!news.starnet.net!waikato!comp.vuw.ac.nz!asgard.actrix.gen.nz!atlantis.actrix.gen.nz!not-for-mail From: dempson@atlantis.actrix.gen.nz (David Empson) Newsgroups: comp.sys.apple2.comm Subject: Re: CCS 7710 info?? Date: 17 Apr 1996 01:13:00 +1200 Organization: Actrix - Internet Services Lines: 30 Message-ID: <4l06cs$i7f@atlantis.atlantis.actrix.gen.nz> References: <creimanDpvv5B.HJz@netcom.com> NNTP-Posting-Host: atlantis.actrix.gen.nz Keywords: apple2 help serial In article <creimanDpvv5B.HJz@netcom.com>, Charlie Reiman <creiman@netcom.com> wrote: > I have a CCS 7710 serial card that I purchased to hook up my brand > spankin' used Apple IIe to my 'real' computers. You bought a CCS 7710 (it should have an "A" on the end)? How recently? It is a rather old serial card (1980 according to the manual I have here, so it predates the Apple Super Serial Card). It is not supported by much software that I know about, because it is not compatible with the Apple SSC (which is the most common type of serial card). > I'm only able to get serial output from my Apple2. I cannot send > anything into the machine. The CCS 7710A uses a Motorola 6850 ACIA chip. This chip requires that certain flow control signals be active in order to allow it to transmit and/or receive. The DCD input must be active to receive anything. The CCS 7710A's serial connector is wired as a DCE, so it redirects the RTS input (pin 4) to the DCD pin of the chip. You must therefore have RTS connected to an active flow control signal to be able to receive anything. (It also uses DTR, pin 20, rerouted to the CTS pin of the 6850, to allow the card to transmit.) -- David Empson dempson@actrix.gen.nz Snail mail: P.O. Box 27-103, Wellington, New Zealand