test-drb

test-drb@ccmp.vtda.org

101090 discussions

by jhfinedp3k＠compsys.to

I am not expecting a whole crowd to respond, but even one individual would be helpful. I also realize that very few individuals even know about the RT-11 Symbolic Debugger, SD:, which is a pseudo device driver what is usually activated by a BPT instruction within a user's program - as opposed to having to LINK in the ODT code. If any reading this uses either V01.00 or especially Y01.16 of the Symbolic Debugger from V05.06 of RT-11, and in particular the SDHX.SYS variant, I would appreciate some feedback on some bug fixes and enhancements that have been made. Some include: (a) Saving Program Counter Addresses (b) Support to activate other selected jobs such as KED (ONLY jobs that do NOT enter SD:) while the user's job is stopped at a breakpoint (c) Single Step Mode to include checking on the Number of Stack Additions and Subtractions - in progress (d) Reduced Low Memory (e) Interactive SET commands for the "Symbol;V" commands (f) SET commands for Saving Program Counter Addresses (g) Help text for the enhancements (h) Any other enhancements that you can think of that can be implemented from a technical point of view - feedback will be very MUCH appreciated All of the changes required more than three times the original 8192 bytes of extended memory required by Y01.16 of the SDHX.SYS variant. Jerome Fine

10 years, 1 month

Honeywell Series 60 (Level 66)/6000 aka DATANET 355/6600 machine language (Charles Anthony)

by michael.99.thompson＠gmail.com

> > Date: Fri, 8 Jan 2016 13:40:52 -0800 > From: Charles Anthony <charles.unix.pro at gmail.com> > Subject: Honeywell Series 60 (Level 66)/6000 aka DATANET 355/6600 > machine language > > I am trying to fire up a DN6600 emulator and am encountering some > discrepancies between the DD01 documentation and existing software. > > Anyone remember how to program this beast? > > -- Charles > I wish that I kept all of the Honeywell docs that I had. I gave most of what I had to the Boston Computer Museum, so it might be a the CHM. I maintained GECOS and the front end software on a Level 66, with DN355, and 716 front ends. The software modifications to the DN355 were done under contract by Honeywell in Bedford, MA. The 355 and 716s were replaced by a pair Level 6 front ends. I still have the platter from one of the fixed head disks from the 716. If I remember correctly, the 16-bit Level 6 front ends ran modified microcode to make it 18-bits by using the parity bits. -- Michael Thompson

10 years, 1 month

PDP-12 restauration in center Germany

by j_hoppe＠t-online.de

Hi, in case somebody needs companions for cross-tests or likes to exchange thoughts: A few month ago we bought a PDP-12 and are restoring she since then. There is no online-diary about progress (the maching is eating up all time), but see here: http://c-c-g.de/index.php?option=com_content&view=article&id=311:pdp12-geka… The 12 is complete with no visible damages and has some undocumented add-ons (they always have). Especially a MOS memory extension was plugged off very soon. Luckily we could organize an 95% complete 2nd module set. After console exchange (we had indeed a 2nd one!) and much trouble with cpu logic, we can now execute opcodes with DO and FILL/EXAM the core memory. Contact me if you like to visit us, we're sitting near G?ttingen (between Kassel and Hannover). Joerg

10 years, 1 month

USO (Unidentified System Unit)

by henk.gooijen＠hotmail.com

Hi list, I was checking one of my rack and saw a rack-mount system unit without any labeling. It consists of a 2-row wire-wrap backplane and a power supply. Looking at the rear side I can read which modules are installed in the backplane. In the upper row are the following modules: M1131 M1131 M306 M112 M111 M205 M205 M3020 8 x upper part of the dual-width M5950 In the lower row are the following modules: M611 M611 M3020 M3020 M113 M205 M205 M205 8 x lower part of the M5950 There are a few slots empty, but those are neither wrapped. I could not find the M5950 nor M3020 in any module list. I did not pull the modules, so I don't know what those modules are. 8 X M5950 suggests something to do with "data path" ... Anybody recognizes this system unit? Thanks, - Henk

10 years, 1 month

Front Panel Update - Video on YouTube

by rodsmallwood52＠btinternet.com

Hi Guys I think I now have the very short clip of front panel production at the silk screeners on YouTube Try https://youtu.be/8qi4cveAc3A (go to YouTube first) Rod

10 years, 1 month

C=64 stuff FTGH in Ottawa

by mouse＠Rodents-Montreal.ORG

I thought I'd got rid of all my 8-bitters, but apparently not - I just found a C=64 (the 8-bitter, not the recently-mentioned Linux machine in a C=64 case) in storage. The box proves to hold a C=64 proper, a 1541 floppy drive, a C=64-branded power brick (117V 60Hz), and a cable apparently intended for CPU-to-floppy connection (at least, the connectors on the ends fit the 1541 and one of the connectors on the machine). It also held another floppy drive, but I suspect that may actually be completely unrelated to the C=64; it's the same form-factor of floppy, but the connector on the end of the cable is a Berg-style two-rows-of-pins connector, not any of the connectors in obvious evidence on the C=64 itself. This is all FTGH. Currently in Ottawa, Ontario, Canada; it might be possible to convince me to ship, but local pickup would really be much preferred - I have very little experience packing such stuff for shipping, selecting carriers, and the like. /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mouse at rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B

10 years, 1 month

Honeywell Series 60 (Level 66)/6000 aka DATANET 355/6600 machine language

by charles.unix.pro＠gmail.com

I am trying to fire up a DN6600 emulator and am encountering some discrepancies between the DD01 documentation and existing software. Anyone remember how to program this beast? -- Charles

10 years, 1 month

HP 9826/36 keyboard

by pdaguytom＠gmail.com

Just acquired an HP 9826/36, that needs a couple of keyboard switches and keycaps, specifically the EXECUTE switch and the ")" switch. Does anyone have these or a spare keyboard they'd care to sell? I can live with the ) key missing as the switch is sheared at the + only and otherwise operates fine. The EXECUTE switch took a hard hit and sticks at the bottom of its travel. Thanks, Tom .

10 years, 1 month

For Sale: MITS Modem board set

by sellam＠vintagetech.com

I have for sale one MITS S-100 modem board set (88 SIOB + MODEM BD). It's in excellent condition physically, unknown functional condition but probably works fine (it's been stored in an anti-static bag). Photos here: http://vintagetech.com/sales/S-100/MITS%20Modem/ Asking $250 or best offer. Thanks! -- Sellam Abraham VintageTech ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintagetech.com Whatsoever a man soweth, that shall he also reap. The truth is always simple. * * * NOTICE * * * Due to the insecure nature of the medium over which this message has been transmitted, no statement made in this writing may be considered reliable for any purpose either express or implied. The contents of this message are appropriate for entertainment and/or informational purposes only. The right of the people to be secure in their papers against unreasonable searches and seizures shall not be violated.

10 years, 1 month

s100

by nierveze＠radio-astronomie.com

hello everyone , first am 1 on the correct channel?? I have several S100 boards , found 25 years ago, kept in my cellar and forgotten....fortunately they are still in good conditions , all circuits are standard ttl (only a few proms) ,and all circuits are on sockets so all is easy to repair. I cleaned and repaired the power supply (only one capacitor exploded ) , I have the correct voltages +- 19v ,+9V on the backplane , now the power supply works . I have very few documentations only a few booklets with configuration data on some of the boards , no schematic. The maker was a french company named ADD-X ,located near Toulouse south west of France . Machines ran cpm/mpm . I have boards of several configurations : *cpu boards with Z80,64k of dynamic rams and 2708 . There are configuration switches around the eprom socket to use 2708 or 2716 . I wonder how it is possible to address more than 64K (rams+eprom)with a Z80 . I need documentation about it . On Ebay I found a Z64 board that is identical , I cannot contact the seller , I tried to get informations ... he does not accept emails. Does anyone know that Z64 ? *boards with 4 rs232+1 ppi *boards with 2 rs232+1ppi+1 fdc configurable for 8 inches or 5 inches floppys. *hdc controllers with one hard disk I also have disquettes,and backplanes . I need informations on the S100/cpm systems , how are boards addressed , it is something like qbus/unibus : fixed address for each category of board,is the console at a fixed address???etc . Since that epoch I have all the classic books from R.Zaks about microprocessors and cpm , there are very few informations on the S100 bus. I built a system with a cpu and a board with RS232 and fdc,I connected the terminal to the port labeled 'con0'(console 0??) ,nothing happened on the terminal. It may be lots of thing from a dead cpu or eprom to rs232 driver . I did not test more for today. I want to build a small system with a monitor in rom to examine/modify ram , registers just to learn Z80 . What monitor can be used ? I have what is necessary to compile and burn eproms . Thanks for your help . I have lots of questions.I can send photos to identify boards . Best regards Alain Nierveze

10 years, 1 month

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