From cdkaiser@delete.these.four.words.concentric.net Tue Nov 24 01:53:32 1998 Newsgroups: comp.binaries.cbm Subject: One From The Vault: RS-232 Schematics From: Cameron Kaiser Date: 23 Nov 1998 07:23:32 PST ** One from the Vault is a best-of compendium of useful, frequently requested or just plain interesting past postings to comp.binaries.cbm, selected by the moderation staff. If you have suggestions about One From the Vault, please mail the moderators. See the FAQ for contact information. *** comp.binaries.cbm is a moderated binaries- *** *** only newsgroup (no discussion or *** *** crossposting allowed) for Commodore 8-bits *** *** *** *** For information on comp.binaries.cbm visit *** *** http://www.concentric.net/~cdkaiser/cbc/ *** *** *** *** This file is also available via FTP from *** *** ftp://videocam.net.au/cbm/incoming *** *** (allow time for submission to be received) *** >Original-Posting-Date: Tue, 6 Jan 1998 16:06:42 -0500 >From: John Iannetta <76703.4244@compuserve.com> >Reply-to: John Iannetta <76703.4244@compuserve.com> >Subject: RS232 schematics >MIME-Version: 1.0 [ Moderator ] Another great informational post from John Iannetta. --Cameron Kaiser -- From time to time there are requests on com.sys.cbm for info about RS-232 interface adapters. They are relatively simple devices that connect to the user port of a C-64/128, and let you use a standard RS-232 external modem. You will be limited to 1200 bps on a C-64, unless your terminal program has special routines which will let you do 2400. This program is a UUencoded version of "RS232". It is meant for a user who has had some experience constructing small electronic projects, and who has access to a small soldering iron and small hand tools. Included is a PETASCII text file which may be either viewed or printed. A CBM 1525 printer (or emulation thereof) is assumed. The file contains a description of the RS-232 interface adapter, construction tips, and a parts list with prices. Please bear in mind that I wrote this file seven years ago; prices have probably since changed. There is also a schematic diagram in high-res format, which may be either viewed or printed. If you build the device and turn on the computer, and find that the lights in all homes within a twenty mile radius dim, you goofed. The device works; I have built several of them. And you will have parts left over. 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Cameron Kaiser * cdkaiser.cris@com * powered by eight bits * operating on faith -- supporting the Commodore 64/128: http://computerworkshops.home.ml.org/ -- head moderator comp.binaries.cbm * cbm special forces unit $ea31 (tincsf) personal page http://calvin.ptloma.edu/~spectre/ * "when in doubt, take a pawn"