test-drb December 2019

test-drb@ccmp.vtda.org

119 participants
88 discussions

by bill.gunshannon＠hotmail.com

Let's try again with the right name in the Subject line! It's not really classic (although it does try to pretend to be but does anyone here do anything with the P112 SBC? I am trying to get 8" disks running on it but I am seeing some rather strange behavior. bill

5 years

Large List of Commodore 64 Games and Software from Sellam's Collection

by sellam.ismail＠gmail.com

Winter is upon us. Time to snuggle up in front of your Commodore 64 with some old timey games and applications, and I've got plenty of them to keep you busy throughout the holidays. The complete list is too long to reproduce here, so please go to the following link, which will take you directly to the Commodore 64 Software section of my Virtual Warehouse of Computing Wonders: https://docs.google.com/spreadsheets/d/1I53wxarLHlNmlPVf_HJ5oMKuab4zrApI_hi… The disks are untested. I can test upon demand but then the price will go up for my time involved. Otherwise they are sold as is. They were all stored under proper conditions, with many of the packages having been stored in ziplock bags. Some of the manuals have highlighting in them from the previous owner but otherwise most everything is in very good to excellent condition, as indicated for each listing. Photographs accompany each listing (the link under the Additional Information column). Rather than attempt to price these individually, I'll simply take offers on one, some, many, or all of these titles. Preference and priority will go to the larger orders. Please direct any questions to me directly via e-mail. Thanks! Sellam

5 years

WANTED: Cromemco EXC extender board...

by wh.sudbrink＠verizon.net

Hi All, I would like to buy, but I will borrow/rent if I have to for VCF East 2020. I'm looking for ONLY the Cromemco EXC, no others. Thanks, Bill Sudbrink

5 years

Canon MDD210

by technoid6502＠gmail.com

I've got a thoroughly tested and working Canon Mdd210 5.25" floppy mechanism here. I don't need such a special mech, any 360k drive would do. If you want this particular mechanism for some reason, just let me know and we can arrange a trade for a more ordinary one. Best, Jeff

5 years

Converting C for KCC on TOPS20

by dave＠661.org

I'm trying to convert some C code[1] so it'll compile on TOPS20 with KCC. KCC is mostly ANSI compliant, but it needs to use the TOPS20 linker, which has a limit of six case-insentive characters. Adam Thornton wrote a Perl script[2] that successfully does this for Frotz 2.32. The Frotz codebase has evolved past what was done there and so 2.50 no longer works with Adam's script. So I've been expanding that script into something of my own, which I call "snavig"[3]. It seems to be gradually working more and more, but I fear the problem is starting to rapidly diverge because it still doesn't yield compilable code even on Unix. Does anyone here have any knowledge of existing tools or techniques to do what I'm trying to do? This is part of a project to get Infocom and other Z-machine games running once again on PDP10 mainframes, either real or emulated. First up is to get the bare minimum of a current Z-machine emulator running on TOPS20. Then we can work on screen-handling, a disk pager[4], and porting to other PDP10 operating systems. I'm hoping that this will lead to fun exhibits wherever PDP10s are displayed in museum or faire settings. [1] https://gitlab.com/DavidGriffith/frotz [2] https://github.com/athornton/gnusto-frotz-tops20 [3] Change an objects shape. [4] Infocom's Z-machine emulators paged zcode from disk, but Frotz simply sucks the whole zcode file into memory. -- David Griffith dave at 661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

5 years

ZedRipper

by rtomek＠ceti.pl

Hello, Surfaced on Ycombinator. This one looks good. Something old, something new, etc. Like my kind of project :-) :: ZedRipper: A 16-core Z80 laptop http://www.chrisfenton.com/the-zedripper-part-1/ and some comments: https://news.ycombinator.com/item?id=21756243 -- Regards, Tomasz Rola -- ** A C programmer asked whether computer had Buddha's nature. ** ** As the answer, master did "rm -rif" on the programmer's home ** ** directory. And then the C programmer became enlightened... ** ** ** ** Tomasz Rola mailto:tomasz_rola at bigfoot.com **

5 years

FTGH - SORD Keyboard

by trash80＠internode.on.net

Was going through a box of stuff someone gave me ages ago in keeping with my philosophy of grab first ask questions later. At the bottom found a SORD keyboard (regrettably not the whole thing) - looks like it comes from a M68. Photo: http://koken.advancedimaging.com.au/index.php?/albums/interesting-finds/con… As this is all I have of a SORD (so I am unable to test it) I figure it may be of use to someone else on this list. (Would appreciate coverage of package and postage from Mortlake Victoria Australia 3272 please. Please note that its the size of a keyboard and is a little weighty so you'll need to factor that in. Alternatively I will be in Melbourne in January 2020 if someone more "local" wants it). Thank you. Kevin Parker

5 years

getting your data from yahoo

by aek＠bitsavers.org

someone just posted this on twitter they seem to have sent an email to everyone and didn't bother to mention this https://groups.yahoo.com/neo/getmydata

5 years

Zilog 8000 system replacement boards

by zilogz80.swing＠yahoo.ca

Original asked by : Evan Koblentz?cctalk at snarc.net On Thu Jul 19 14:36:27 CDT 2018..Zilog 8000 system (model 20 and model 32) replacement boards ..As far as the System 8000 model 20 are conserved their microprocessor board schematics and firmware can be found on the internet but the microprocessor and the MMU's might be hard to get. ? (out of production for some time now). .. As far as the MMU's are concerned some System 8000 clones used a different MMU with a custom mapping PROM and or others use a Intelligent MCU to emulate the Zilog MMU's....As far as the Model 32 is concerned that a little different, without the original microprocessor board you could always down grade it to a lesser model. It would be easy to get the Z8001 microprocessor on to a 32 bit data bus.? Just some extra data latches if you could find some one to make a custom microprocessor PCB.Use the Z8001 microprocessor pins Bit//word, AD0, AD1 for data bus size signals.AD1 is for data bits 17 to 24 and data bits 17 to 32 depending on the status of Bit//Word and AD0 singals.AD0 is for data bits 0 to 16 with the correct status of Bit//word and AD0 signal.??Bit//Word with AD0 controllers either a upper byte/Lower byte or 16-bit word transfers...Memory greater that 16M with the Z8001 microprocessor on a full 32-bit address bus is possible with a paged memory management circuit. Drivers ?? by who ??..With the model 32 (and some if its clones) on board firmware and or operating enhancements where used for Z8001 ( and some Z80,000)? microprocessor compatibility.? The only other solution is to reverse design a AT&T 3B2 computer back to the Zilog System 8000 bus or use a custom made ARM based microprocessor card with Z8001 emulation in ROM.?..Most of the Z8000 based microprocessor system I have dealt with are newer than the model 32 or are older then the Zilog MMU's chips.?..Any feed back on this email is welcome at ZilogZ80.swingatYahoo.ca? ? ?At=@ please have a subject (Anti spam)..

5 years

TRS-80 Model IV PALs

by rescue＠hawkmountain.net

I have a TRS-80 Model III with a IV upgrade in it (non gate array). I have a hunch that one or two of the HALs are bad (the primary one being 8075208). Anyone have the JED files to program any of these HALs into PALs or GALs ? Anyone know a source for these ? Anyone know if these can be read, or if they are protected (for example, if I were able to borrow some working ones, could they be duplicated ?) ? Thanks, -- Curt

5 years

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test-drb December 2019