test-drb January 2003

test-drb@ccmp.vtda.org

388 participants
970 discussions

by dwightk.elvey＠amd.com

Hi David It may not be as hard as you'd think. First, you don't have to cross compile CPM-8000. There already is a CPM-8000. Recently, source and release code was found for this and, working with Chris Groessle, we've managed to bring it up on our Olivetti M20's. This code was originally written for the M20, as it was the only major machine sold with a Z8000 ( there were a few SBC's out there ). The release comes with a C compiler and an assembler. There is source code for the BIOS as well. It does depend on the M20 ROM code for low level access. This CPM was mostly written by a combination of Zilog and DR people. It is mostly written in C with a minimum written in assembly. There are a few issues. Even though the manual says you can get by with only 128K, this would be difficult. Several of the utilities require two 64K chunks ( one for instruction and one for data ). It would be best if the other system functions had there own piece of RAM to work in. One needs to map the memory such that you can access a single 64K as both instruction and data as well as the 128K as 64k instruction and 64k data. The bad news is that we don't have the complete source for the CPM. The BIOS does require that it be compiled on a running CPM-8000. As the documents state, it would be difficult to build it on some other system. Still if someone is willing to write a BIOS for their board, I'd be willing to compile the code for them on my machine. Dwight >From: "Kane, David (DPRS)" <David.Kane(a)aph.gov.au> > >Hi, > >I always wanted to play with this processor, I just never got the chance. I have a copy of the Zilog "Microcomputer Components - Data Book Feb 1980" and a copy of "Programming the Z8000" (a Sybec book), but that is about as far as I ever got. I was tinkering with the thought of modding the SIMH emulator to include a Z8000 system, but I don't have any details or experience of any real systems. I then though to invent a fictitious S100 system, based on the existing Altair emulation, but with a Z8000 CPU. This could most likely run a CPM8000 system, with the appropriate BDOS changes. But a lot of work would be need to get a set of compilers/cross compilers for the Z8000, either in tracking them down or writing them. I saw recently that BDS C has been put into the public domain with full source, so there might be some avenue there. Still to generate CPM (or MPM) for a fictitious machine would be a mammoth undertaking, I have all the source code needed, just not the compilers. It would require an 8080/Z80 to Z8000 cross assembler (to avoid rewriting all the assembler), a Z8000 PLM compiler, and a Z8000 C compiler. > >Anyway I am declaring myself an unfulfilled fan of the Z8000 processor family. > >David Kane > >-----Original Message----- >From: G?nter Mewes [mailto:info@mewesbus.de] >Sent: Saturday, 28 December 2002 12:49 AM >To: cctech(a)classiccmp.org >Subject: Z8000-Fan > >Hi Mr. Johnston, >today I was looking for some Z8000 Fans, to talk about experieces ... >Are you interested ? > >Please, be so kind and send a mail. > >Guenter Mewes (www.guentermewes.de)

21 years, 10 months

VAX-11/780 spotted in a movie

by mcguire＠neurotica.com

A friend and I just watched the movie "Seven". I'd seen the movie before, but I hadn't noticed the VAX-11/780 in the background of the computerized fingerprint matching scene. It's obviously not running (no roar in the background) but it was definitely a '780. :-) -Dave -- Dave McGuire "She's a cheek pincher. I have scars." St. Petersburg, FL -Gary Nichols

21 years, 10 months

Cromemco

by rob_gr＠yahoo.com

Mike, When I get a chance I will try to dig out information on the Cromemco, 64KZ memory board. Can not promise I will find anything as we are looking at 15 years. Bob __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com

21 years, 10 months

Oersted Ratings of DC300A and DC600 Tape Cartridges

by aek＠spies.com

an interesting history of the 1/4" tape format can be found here: http://www.cybergenetic.ca/ebook/wrh13.htm

21 years, 10 months

Computers for sale

by JRBrown＠DVECCJAX.med.navy.mil

I have a Kaypro III, 2 Osborne I's and 1 IBM laptop. All three are 10-15 years old and all but 1 of the Osborne's run fine. I would like to sell them but don't know how to go about it. Could you offer some advice. I will be inventorying the software this evening and will be able to answer detail questions tomorrow. I appreciate your assistance. James R. Brown Jrb2000(a)bellsouth.net <mailto:Jrb2000@bellsouth.net> or jrbrown(a)dveccjax.med.navy.mil <mailto:jrbrown@dveccjax.med.navy.mil> Phone after PM is 904-269-3984; cell 904-813-8452

21 years, 10 months

Scripsit for TRS-80 Model 4; bug in program

by bobh＠wolv.tds.net

Did anyone here use Scripsit on the TRS-80 Model 4 and have the problem of long documents getting all garbled? That was a wonderful memory that I had of the "Good Old Days".

21 years, 10 months

Vintage Computer

by mail＠auctionessentials4u.com

Ernest, I was an Engineer at Apple in the late 70's. I have an original Apple II that I put together as my lab bench computer. It has a proto-type Language Card that I designed.( I also have hand written design notes for the board and a second proto card) The system also contains a proto-type Disk controller boot card and 16 sector Disk. I also have a proto-type hand soldered proto-type parallel port that I designed and licensed to Apple. My library contains a ton of software much of which was used as in-house design tools, some with documentation. The system works. Have you any idea how much this may be worth and the best channels to sell it? BTW: I live in Woodinville WA and I believe you are in Seattle. Check out my Bio at: http://www.ipages4u.com/Bio.htm Robert Paratore paratore(a)ipages4u.com 206-353-6666 http://www.ipages4u.com

21 years, 10 months

Sharp PC7000

by formated＠juno.com

The Sharp PC7000 has a nice light blue display with different backlight settings...Dim, Standard, and Bright. A contrast wheel helps fine tune the view. On bright the text is clear and readable.

21 years, 10 months

Power Supply for IBM Aptiva

by rtuttle＠earthlink.net

Robert F. Schaefer: [power supply, FRU 06H2973, P/N 06H2971 has 3.3V, and an extra connector, keyed 3 pin with a latch, 22GA black, white, & red] Do you still have this available? I use my old Aptiva A40 as my network server here at home. The power supply has been failing for a while but as long as you don?t bump it, it seems to work OK. However, Christmas must have done it in. I need a new one. Will be glad to get yours if still available. Thanks, Rick Tuttle Milwaukee

21 years, 10 months

Anyone have any experience replacing a Dallas 1287 with a 128 87?

by Robert_Feldman＠jdedwards.com

There are 3 memory expansion slots. When filled with 4MB modules, the max RAM is 12.6MB. Three hard drives were offered: two 20MB (type 2) and one 40MB (type 22). The difference between the 20MBs was the interleave of 1:1 vs 3:1. The Compaq Service Quick Reference Guide (1992) lists 13 different ROM revisions, from F.2 to K.1 -----Original Message----- From: Ethan Dicks [mailto:erd_6502@yahoo.com] Sent: Wednesday, January 01, 2003 4:51 PM To: cctalk(a)classiccmp.org Subject: Re: Anyone have any experience replacing a Dallas 1287 with a 12887? --- Tothwolf <tothwolf(a)concentric.net> wrote: > Years ago I used to maintain some of these systems... > The memory modules are located center-front of the "laptop", under a > metal shield/cover. Yep. Found those. Full of SRAM, not DRAM, astonishingly enough. > I don't remember how many slots exist, but I think it can > hold 3, maybe 4 modules. Modules were available in 1MB and 4MB sizes. Three. I have three 1MB modules. Didn't know there were 4MB modules. I'm sure I'll never run across any. For DOS usage, 3.6MB is OK. This one has Windows 3.0 on it, but I don't need it for what I'm doing. > The hard drive is a 3.5" form factor IDE drive. Usually, these systems > had a 20MB or 40MB drive, but it would have been possible to upgrade > it to 120-210MB too... Mine has the bog-standard 40MB Connor drive (type 22). Would love to find a set of replacement ROMs for this so I could use oddball drives, but for now, I'm stuck with what I've got. -ethan <snip>

21 years, 10 months

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test-drb January 2003