Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!amdcad!ames!aurora!labrea!jade!ucbvax!WALKER-EMH.ARPA!InfoMail-Mailer From: InfoMail-Mailer@WALKER-EMH.ARPA Newsgroups: comp.sys.atari.8bit Subject: Undeliverable Mail Message-ID: <8709240043.AA01023@ucbvax.Berkeley.EDU> Date: Wed, 23-Sep-87 16:23:00 EDT Article-I.D.: ucbvax.8709240043.AA01023 Posted: Wed Sep 23 16:23:00 1987 Date-Received: Sat, 26-Sep-87 10:47:15 EDT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The ARPA Internet Lines: 252 Mail was not delivered to the following users because there were bad address(es) in TO and/or CC field(s): info-atari UNDELIVERED-MESSAGE: ---------------------------------------------------------------- Received: from BBN.COM by WALKER-EMH.ARPA ; 23 Sep 87 20:15:45 GMT Received-2: from score.stanford.edu by BBN.COM id aa06540; 23 Sep 87 16:01 EDT Date: Wed 23 Sep 87 10:22:59 PDT Subject: Info-Atari8 Digest V87 #83 From: Info-Atari8 @ SCORE.STANFORD.EDU Errors-to: Info-Atari8-request@Score.Stanford.EDU Maint-Path: Info-Atari8-request@Score.Stanford.EDU To: Info-Atari8 Distribution List: Reply-to: Info-Atari8@SCORE.STANFORD.EDU Text: Info-Atari8 Digest Wednesday, September 23, 1987 Volume 87 : Issue 83 This weeks Editor: Bill Westfield Today's Topics: SYSTEM FOR SALE Success(Partial)!! 65c802 and card Atari 8bit 4Sale 6502 stuff ANALOG 8-bit Extra ---------------------------------------------------------------------- Date: 20 Sep 87 21:58:08 GMT From: vanvleck!uwmcsd1!csd4.milw.wisc.edu!pirc2499@speedy.wisc.edu (James Franc Pirc) Subject: SYSTEM FOR SALE To: info-atari8@score.stanford.edu My friend is selling his system which includes the following: one 800 computer one 800XL computer one 1050 disk drive one Indus GT disk drive one voice box one MPP-1000C 300 baud modem joysticks roughly 60 disks miscellaneous cartridges This system is between 1 and 4 years old (depending on piece). Everything works. 800XL has a slight "rolling" problem. Everything is unmodified. My friend is moving and has no room to move the stuff...He will pay for shipping...Prefer to sell as system, will separate if necessary... Please send e-mail with a price to me. True : James Pirc ARPA : pirc2499@csd4.milw.wisc.edu GEnie: JIM.PIRC ------------------------------ Date: Sat, 19 Sep 87 22:58 EDT From: Cothrell@DOCKMASTER.ARPA Subject: Success(Partial)!! To: info-atari8@SCORE.STANFORD.EDU thanx to whomever posted the bit about the pin36 of the "sally" chip. that bit of info proved to be the missing piece. I am pleased to announce that I have one of my processor cards working. It works with a standard 6502, but right now, doesn'T work with the 65c802...it tries to boot, but gets hung up, I think I may have too slow a chip, but dont know where to find another faster one. I at least know that the card works, all I have to do is figure out whats different about the 65802. I will release some documentation on the Hows and Etc... sometime in the future. YaaaaaaHooooo, this makes my day! ------------------------------ Date: Sun, 20 Sep 87 19:29 EDT From: Cothrell@DOCKMASTER.ARPA Subject: 65c802 and card To: info-atari8@SCORE.STANFORD.EDU Contrary to popular belief...the 65C802 is not 100% compatible with the 6502. I discovered this in building the processor replacement card.. the 65c802 cannot have its cycle extended by "stretching" the Phase 0 clock at a logical 0. the spec sheet specifies a "maximum T0-low" for the phase 0; the max time for my chip (4Mhz version) is 10 us. the 6502 max low time is infinity. the 65C802 max high time is infinity, but the 6502 has a non-infinite max high time. Back to the drawing board. ------------------------------ Date: 21 Sep 87 20:40:46 GMT From: ihnp4!homxb!mtuxo!mtune!codas!killer!jockc@ucbvax.Berkeley.EDU (Jock Cooper) Subject: Atari 8bit 4Sale To: info-atari8@score.stanford.edu I am posting this for a friend. The following items are for sale: 8-bit Atari MIDI System consisting of : 130XE - $100 1050 Drive - $100 Amber 80 Monitor - $75 Hybrid Arts MIDI Interface & MT3 Software - $100 I would prefer to sell this as a package. Also for sale: 800 48K - $50 810 Drive - $75 600XL 64K - $50 1027 Printer - $60 (need pwr supply) Televideo 950 - $200 Please mail responses to: ihnp4!killer!jockc or call 615-327-0744 (ask for chris) all prices neg. -----------+ jockc | ------------------------------ Posted-Date: 21 Sep 87 20:48 EDT Date: Mon, 21 Sep 87 20:43 EDT From: Cothrell@DOCKMASTER.ARPA Subject: 6502 stuff To: CL150652%ULKYVM.BITNET@WISCVM.WISC.EDU Mike B. (this is being sent to two accounts, Dflint02 at ulkyvx.bitnet and cl150652 at ulkyvm.bitnet) I sent something similar to this out to info-atari8, so if you've seen it, read it anyway. (just kidding). I used the circuitry from the 800 tech ref book to do the tri-stating. I have it working as of yesterday(20th) for the 6502(standard). It does not work with the 65C802 (802), I think due to the fact that the 800 "halts" the 6502 by stretching the phase 0 clock at a logic 0 level. I don't know wether you caught it or not, but the 800 did not use the phase 1 and 2 clocks generated by the 6502...instead, a 7474 was used to generate the system clocks externally(so when the phase 0 clock was stretched, it would not affect the rest of the system). Anyway, the '802 cannot be "halted" by stretching the phase 0 clock low...it has a maximum low time of 10 uS and a max high time of infinity--just about opposite of the standard 6502. For that matter, the 65C01 and 65C02 have the same problem. I have tried several ways of stretching the phase 0 clock at a logic 1 level, but to no avail, I think it throws the internal timing of the cpu off. I might be able to make it work if I design a bit of circuitry, which is what I am thinking about now, but am not having any luck(plus I need a proto-board to do all this on...wire-wrap is a bitch). about increasing the speed...been thinking about that too. My data book (ala Synertek, 1983) shows 6502 available to 4 Mhz, 6520 to 2Mhz. In looking at the 800 schematics, it has occurred to me that the board I have built is the first step to building a faster processor. My reasoning is as follows: We want to speed up the CPU without affecting the rest of the circuits(ANTIC, GTIA, etc), so we will have to generate the system clocks(Ph1 & Ph2) off of the CPU. Next, we have to be able to stop the processor for ANTIC DMA. To stop the processor, in sync with the ANTIC, we need use the "halt" signal of the ANTIC and have some relationship between the ANTIC's master Ph0 and the CPU's Ph0. Next, the system clocks Ph1 and Ph2 have to have "two speeds", one fast speed for the CPU to do memory access, and a slow speed for the ANTIC etc... . What I have in mind(warped as it is) is using the Antic Ph0 as a trigger to what I call a clock doubler, which will produce 2 Ph0 clock cycles for each Antic Ph0 pulse. The doubled clock is basically the CPU Ph0. For the system clocks, the best Idea I have right now is to run a 7474 (ala 800) at the doubled speed, providing the fast system clocks, and putting a divide by two circuit in to make the ANTIC and GTIA slow system clocks. The problem that I haven't got a solution for is the actual memory accesses...how to have both fast and slow access...I think I need a 6502 wait state??? but I dont know how to implement that just yet. To sum up these ramblings, the 65C802 project is at an stand-still for the moment. Until I figure out a way around the difference between the two processors I cant do much more but listen to the 1200xl doing sound checks with the standard 6502 board. Suggestions are solicited. CPU speedup seems like it might be possible, but I'm not going to be working on it anytime soon, I think someone out there already mentioned that he was close to a solution; it would be nice to here his comments and how he attacked the problem. Any comments from the Atari Inc. people on what their users are trying to do to their machines??? Scott Cothrell Cothrell at dockmaster.arpa ------------------------------ Date: Wed, 23 Sep 87 01:06:50 CDT To: From: "Gene Merritt" I just installed my new US Doublers and started using SpartaDos. Unfortunately SpartaDos conflicts with my OmniView 256 chip. This disables a few functions of SpartaDos that I would realy like to use. Is there any easy way to make a "ramrod xl" card that that will allow me to choose between OmniView and the original OS? Can I make a board that sockets both chips and put a switch to the +5 lines to activate the right chip at power up? Do I need to worry about the ground wires? Can it be that simple? I would appreciate hearing from anyone that owns a Ramrod board, or has any ideas. f1.gdm @ isumvs.bitnet ------------------------------ Date: 23 Sep 87 03:32:14 GMT From: sunybcs!bingvaxu!leah!uwmcsd1!lakesys!tommyj@rutgers.edu (Tom Johnson) Subject: ANALOG 8-bit Extra To: info-atari8@score.stanford.edu Any one get the ANALOG 8-bit Extra? I did and typed in a program called CGM. I used the MLEditor they supply. The MLEditor doesn't allow you to make mistakes so the program must be bad. The tracker routines work just fine. But the windowing causes a lock up. Actually the open window is the lock up. If anyone out there has a delphi password, did ANALOG put up the corrected version yet? Anyone else have this problem? Tom ------------------------------ End of Info-Atari8 Digest ************************** ------- -------------------END OF UNDELIVERED MESSAGE-------------------