Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!dsinc!bagate!cbmvax!daveh From: daveh@cbmvax.commodore.com (Dave Haynie) Newsgroups: comp.sys.amiga.hardware Subject: Re: Jumpers on B2000 REV 4.2 (?) Message-ID: <22511@cbmvax.commodore.com> Date: 17 Jun 91 20:16:46 GMT References: <22383@cbmvax.commodore.com> <1991Jun15.230048.19216@athena.mit.edu> Reply-To: daveh@cbmvax.commodore.com (Dave Haynie) Organization: Commodore, West Chester, PA Lines: 26 In article <1991Jun15.230048.19216@athena.mit.edu> leekil@athena.mit.edu (Lee 'S' Kilpatrick) writes: >In article <22383@cbmvax.commodore.com> daveh@cbmvax.commodore.com (Dave Haynie) writes: >Is the connector in the back near the serial port indeed an internal >connection for the serial port, as some guy suggested who fried his Amiga >poking around with these pins? Yup, that's an internal serial port header. The main point of this was to make it possible to support an add-on A1000-style serial port, should it be necessary for any peculiar products on the market. For those who don't recall the A1000 serial port, in addition to being the opposite sex as the A500, A2000, and most other computers (since the IBM PClones set the "standard" for what a RS-232 sex a personal computer should be, not totally obvious since the computer acts as both DTE and DCE, especially going way back, when you hooked a terminal up to your personal computer to get it to work), had extra lines available, including a clock and an interrupt input. We figured, if there was anything out there that couldn't get by with a simple gender-bender, a real A1000 compatible D25 could be put in one of the A2000 knockout panels and hooked up here. Other than the occasional BridgeCard user who hooks the BridgeCard beeper output up to the audio input in this connector, I don't know of anyone ever having actually used it. -- Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy "This is my mistake. Let me make it good." -R.E.M.