Aucbvax.1587 fa.info-micro utzoo!duke!decvax!ucbvax!CSTACY@MIT-AI Tue Jun 9 23:53:35 1981 INFO-MICRO Digest V3 #47 INFO-MICRO AM Digest Wednsday, 10 June 1981 Volume 3 : Issue 47 Today's Topics: 6502 - Multiply/Divide query, Cross Assemblers Needed - 6502 on Unix & 6809 on RT-11, TI990 vs PDP-11, C on a TRS-80, FORTH questions, Shipping media, IEEE Fixes - CCS Disk Controller ---------------------------------------------------------------------- Date: 16 May 1981 21:52-EDT From: John Howard Palevich Does anybody have 16-bit multiplication/division/remainder subroutines for the 6502? Thanks, Jack Palevich ------------------------------ Date: 05/22/81 09:28:52 From: HQM at MIT-ML Re: 6502 assembler that runs under UNIX Does anyone have any pointers to a cross assembler for the 6502 that runs on a UNIX system? I am not on info-micro, so could you CC a copy of your reply to HQM@AI thank you. Henry Minsky ------------------------------ Date: 28 May 1981 1116-EDT From: KSPROUL at RUTGERS Re: 6809 CROSS ASSEMBELER DOES ANYBODY HAVE A CROSS-ASSEMBLER THAT WILL RUN ON RT-11 FOR THE 6809. A GOOD CROSS-ASSEMBLER FOR THE 6809 MIGHT DO THE TRICK .... IF IT IS WRITTEN IN FORTRAN.. ANY INFO WOULD BE HELPFUL KEITH SPROUL KSPROUL@RUTGERS ------------------------------ Date: 27 May 1981 03:00 edt From: Schauble.Multics at MIT-Multics Re: Speed comparison TI/990 vs PDP-11 There is a company in town that sells turnkey systems to heavy equipment operators. They have their software up on several different micros. Their experience is that for comparably priced CPU pairs, the TI will run 50 to 80% faster. ------------------------------ Date: 6 May 1981 15:34:16-PDT From: ARPAVAX.toy at Berkeley Re: Question about TRS-80's I have another problem that I thought I'd throw out to the info-micro world and see if I can get an answer. I have access to a TRS-80 running TRSDOS and I need to program in C on this machine. What is the least expensive way to do this? As I see it this is actually two questions: 1) Is there a TRSDOS C Compiler ? 2) How much would it cost to convert a TRSDOS machine to run CP/M ? thanx in advance, Michael Toy ------------------------------ Date: 13 May 1981 2121-EDT From: DGB at MIT-DMS (David Gaines Burnette) Subject: fig-FORTH I recently bought the source for fig-FORTH from Mountain View press for the 6809 (SWTPc). After typing it in and correcting all of the errors, I got it running. However, I am puzzled by the COLD start. Whenever I do a COLD start, my disk drive cuts in and then FORTH gives me an error (just a ^G and ?). Is there some file on the drive that FORTH is looking for? Also, the disk access is directly interfaced to the disk drivers in FLEX. Therefore, FORTH doesnt care what FLEX files exist. There seems to be no way for me to LIST the different SCReens in FORTH. All I get is the directory and other binary files dumped to my terminal. Can anyone out there explain to me FORTH's disk access and what my be causing the cold start error? Can someone out there explain how to list a definition that has been typed in to forth? And also, how to save/re-load it from the disk? Thanks, David Burnette DGB at MIT-MC ------------------------------ Date: 19 May 1981 2032-EDT From: ROBGS (Rob F. Griffiths) Re: Disk Shipping When I send a disk, I simply: A) Wrap it between two pieces of cardboard (With tape of course) B) Put it in a small box (I usually use a box that contained new disks) and put newpaper around the disk inside the box. C) The last step is to wrap the box, then on the ouside write something to the effect of: COMPUTER MEDIA: DO NOT FOLD and oiccaisonally: COMPUTER MEDIA: DO NOT XRAY OR FOLD!! And to this date, I have never had any folded or mutilated disks arrive (or any complaints from friends about my disks) here. Hope this helps; -Rob. ------------------------------ Date: 05/27/81 03:37:09 From: W8SDZ at MIT-MC Re: CCS Disk controller fixes CCS 2422A DISK CONTROLLER FIX Chuck Weingart 2152 W Iowa Chicago IL 60622 5/14/81 The California Computer Systems 2422 disk controller is claimed to be IEE 696 compatible, but it isnt quite, and it does not work with several good Z80 CPU boards, like the Cromemco SCC or the Vector Graphics Z80 Cpu. Here is the fix for that: Break the connection to U36 Pin 12 (I did it under the 1793 chip, where it is invisible). Connect a 400pf cap. between U36 P12 and ground. Connect a 220 ohm resistor between U36 P12 and U6 Pin 6. This will delay the PWR* signal from the CPU until the 1793 has been selected and performed internal operations. The CCS CPU card has a delay of 62ns on the PWR signal, but that delay is quite longer than the IEEE specs, and other IEEE compatible boards do not have the delay necessary to make the 1793 chip work right. ------------------------------ End of INFO-MICRO Digest ************************ ----------------------------------------------------------------- gopher://quux.org/ conversion by John Goerzen of http://communication.ucsd.edu/A-News/ This Usenet Oldnews Archive article may be copied and distributed freely, provided: 1. There is no money collected for the text(s) of the articles. 2. The following notice remains appended to each copy: The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996 Bruce Jones, Henry Spencer, David Wiseman.