Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 exptools 1/6/84; site ihnp1.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!houxm!ihnp4!ihnp1!mth From: mth@ihnp1.UUCP (M. Horbal) Newsgroups: net.micro.zx Subject: ZX81 info needed Message-ID: <211@ihnp1.UUCP> Date: Thu, 16-Feb-84 09:56:16 EST Article-I.D.: ihnp1.211 Posted: Thu Feb 16 09:56:16 1984 Date-Received: Fri, 17-Feb-84 03:06:55 EST Organization: AT&T Bell Labs, Naperville, IL Lines: 22 I would appreciate the following information on the Timex/Sinclair ZX81 or TS-1000 computer: 1. Are the schematics for the computer and the 16K RAM pack available anywhere? 2. Does anyone have any documentation on the SLC/ULA chip on the main board? 3. Is composite video signal available anywhere on the board? 4. On poer-up, is it possible to start execution in ROM other than the OS/BASIC, and if so, how? 5. Does anyone have official or disassembled source of the OS/BASIC? 6. Is there any documentation of user callable routines in the kernel? I would appreciate any information on the above. I will collect and post the responses. Thank you. M. Horbal ih1b230 x3425 ihnp1!mth, ihnp3!mth -- Mark T. Horbal IH1b230 x3425 ihnp1!mth, ihnp3!mth