test-drb December 2001

test-drb@ccmp.vtda.org

243 participants
1096 discussions

6502/Z80 speed comparison (was MITS 2SIO serial chip?)

by CLeyson＠aol.com

In a message dated 12/22/01 Richard Erlacher writes: > If you want to insist that you can devise a task, any task at all, mind you, > that you can code in Z80 code to run at 2x the clock rate of a 6502, in, say, > <80 lines of assembler, that's strictly a computing task, just to leave I/O out > of it, or any I/O task that you think you can code in legitimate Z80 > instructions, providing a precise spec for the I/O task, then I'd certainly come > out and say you can't cook a legitimate one up that a 6502 can't accomplish in > less time, in the case of the computing task, and that, since the I/O task spec > limits the rate, the 6502 will be able to do it as well. I'd like to see a task > that meets those spec's How about a straight insertion bubble sort ? A completely useless task but it does take a defined number of data moves and compare operations. The array to be sorted could be say, 16-bit signed integer, 1k words long and in reverse order. (That should take a while for a 6502 to sort out). Chris

22 years, 9 months

What did you ask "Santa" for this year.... : )

by djenner＠earthlink.net

Doesn't the DQ614 emulate the RL01/RL02? Can't you just use the RL device hander? Dave SP wrote: > > One Dilog DQ614 driver disk for RT-11. I have > one of these boards inoperative because I can't > configure it. > > Happy Christmas (if applicable) > > Greetings > > Sergio -- David C. Jenner djenner(a)earthlink.net

22 years, 9 months

Pyramid 90x

by pechter＠ureach.com

Here's what I know about the 90x... I haven't worked with Pyramid gear in about 9 years so I may be dropping a few bits. The machine loads COS the diagnostic software from an 80 track 96 tpi 5 1/4 disk. This contains the support software to download the necessary code into the machine to make it boot. The operating system is OS/x (a BSD 4.2 or 4.3 and SysV rel 2 or 3 hybrid). I'd love to get a machine running that around so I could figure out how they do the dual universe stuff so I could do it with FreeBSD. I used to teach OS/x Operations, Sys Admin, Comm and such for Pyramid and I also taught maintenance on their MIS series boxes. I had a 98x (IIRC) in the office which was similar to the 90x. Bill -- Bill Pechter Systems Administrator uReach Technologies 732-335-5432 (Work) 877-661-2126 (Fax) ---- On Sat, 22 Dec 2001, Dan Cohoe (dancohoe(a)oxford.net) wrote: > I recently brought home a Pyramid 90x. The old owner who had run the > machine at his work in the 80's bought it from his employer about 1990, > but never got it set up at home. > > Apparently he decided to dump it a few months ago, but because of its > size didn't get the job done. However, he did put all of the software > and the documentation on the curb for the garbagemen at that time. > > Mike Kenzie and I got there just before he called the recyclers for the > machine itself. > > What I need is a boot disk or other software and any documentation that > might be out there. According to the old owner, it starts by loading > the > boot program off the 8" floppy before it can find the fixed disks. > > Does anyone have anything for this machine? > > thanks, Dan Cohoe > > >

22 years, 9 months

siemens nixdorf laser printer driver for pageprinter model md12

by ROCKYROADENNIS＠aol.com

driver wanted regards rockyroadennis(a)aol.com

22 years, 9 months

D*A*T*A* I*/*O* M*a*n*u*a*l*s

by CLeyson＠aol.com

Try http://www.spies.com/arcade/TE/index.html for the 29A programmer. Lots of other goodies there too :-) Chris

22 years, 9 months

What did you ask "Santa" for this year.... : )

by mranalog＠attbi.com

Matt wrote: > So what is everyone else on the list asking for? Computer related... of > course..... I'm getting a nice 100% mechanical analog. http://dcoward.best.vwh.net/analog/libra.htm It's coming by Big Brown sled as we speak. Reagards, --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://www.best.com/~dcoward/analog =========================================

22 years, 9 months

6502/Z80 speed comparison (was MITS 2SIO serial chip?)

by ajp166＠bellatlantic.net

From: Richard Erlacher <edick(a)idcomm.com> >without modification, in most cases, on a Z80,.by the time the 6502 became >popular. Now, I've always believed the 6502 at 1 MHz to compare favorably with >the 4 MHz Z80, but I used the Z80 running CP/M 2.2 to do useful work, since it >was a lot more trouble squeezing useful work out of a 6502 back in '78-'79. If anything I'd say CP/M was a factor more than any virtue of Z80. I say that as most "z80" code underused the Z80 as a fancy 8080. One may wonder if a cp/m like (or better!) OS existed for 6502 such that it was portable or easily ported if things may have developed differently. Allison

22 years, 9 months

D*A*T*A* I*/*O* M*a*n*u*a*l*s

by mranalog＠attbi.com

Last fall I suddenly, in the space of two week, received five requests for a D*A*T*A* I*/*O manual I mentioned on ClassicCmp back in 1999. Thank to help from Arlen Michaels, I got all of those requests filled. Now, I don't mind copying manuals, but after two years and one move the manual and the files where a pain to dig out of "the pile", and these were not list members. So, the ClassicCmp list archive is the reason for the "*"s. Now, one of the people that requested a manual sent me a couple of PDFs that I wondered if anyone here would like to host? I want to get them out there so everyone can use them, but I didn't want to keep getting requests years from now via the archives. 1. D*A*T*A* I*/*O* 2*9*a* U*n*i*v*e*r*s*a*l* P*r*o*g*r*a*m*m*e*r* 9*9*9*-*0*0*2*9* dated May 1982 102 pages (includes schematics) size - 10 MB 2. D*A*T*A* I*/*O* U*N*I*P*A*K* 2* dated 1984 76 pages (includes family, pin*out codes and schematics) size - 8 MB So, if ONE person would like to host these files, (and not mention my name) I can put them up on the web one at a time to be grabbed. Regards, --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://www.best.com/~dcoward/analog =========================================

22 years, 9 months

summit electronics

by Golemancd＠aol.com

anyone ever use this web site i cant get a response from them joe also this one http://www.summitelectronics.com http://www.ied.pios.com/

22 years, 9 months

CoCo & MOS books

by mhstein＠usa.net

Three more books available: RS TRS-80 Color Computer Technical Reference Manual 26-3193, 69 pages RS TRS-80 MC-10 Micro Color Computer Service Manual 26-3011, 47 pages (Photocopy purchased from RS) MOS Technology MCS6500 Microcomputer Family Programming Manual, Jan '76, 8 1/2x11, approx. 200 pages. Will throw in Synertek 6500 & 6500B data sheets full of timing and cycle time info so you can join the fascinating (!) discussion presently raging among Dick, Allison & Ben. $4.95 ea plus postage, or BO, if anyone's interested. Meanwhile, the very best wishes of the season to everyone on the list; nice to have met all of you, virtually speaking, and especially the two I've had the pleasure of meeting in person. To those of you still patiently waiting to hear from me regarding items of interest, I haven't forgotten. Bear with me, and after the Xmas rush at the post office, I'll get back to you. And may the New Year be a more peaceful and less traumatic one than this one's been (although it doesn't look good...) Happy & fruitful collecting! mike

22 years, 9 months

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test-drb December 2001