CP/M and C128
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From: David Murray on 22 Mar 2010 21:09 > > please I would like to know if there is a reference site for CP/M > > software for the C128.. In all of my years with Commodore equipment, I've never once seen a CP/ M program running on a C128 other than the stuff that comes on the CP/ M startup disk you get with the C128. I do admit a curiosity to see something actually running on there, but I can't so much as find a screenshot or youtube video or anything on the subject.
From: BruceMcF on 22 Mar 2010 22:27 On Mar 22, 9:09 pm, David Murray <adri...(a)yahoo.com> wrote: > > > please I would like to know if there is a reference site for CP/M > > > software for the C128.. > > In all of my years with Commodore equipment, I've never once seen a CP/ > M program running on a C128 other than the stuff that comes on the CP/ > M startup disk you get with the C128. I do admit a curiosity to see > something actually running on there, but I can't so much as find a > screenshot or youtube video or anything on the subject. I know you can run VDE, since I did, but if I recall correctly the install program had to be used to define the terminal functions. I don't think I ever had a chance to try out dBase or Visicalc, which would have been the two other programs you'd want to use. The problem with CP/M on the C128 is that the Z80 or 8080 before it were never "clock cycle per memory access" processors, so running it at 2MHz was silly ... running it at the 8Mhz "dot" clock or 4MHz "half dot clock" with wait states to allow it to access the 2MHz memory bus would have resulted in a much more useful system, at least if one had the 1571 or 1581 disk drive. I only had my C128D for a short period before plugging the power tap for my printer interface into the datasette port upside down and frying the 8502 processor ... I had a C128 in Grenada, but left it there, and it was a C64 with The Write Stuff word processor and a daisywheel printer that I used for word processing in grad school in the early 90's.
From: Christian Brandt on 23 Mar 2010 21:20 Am 23.03.2010 03:27, schrieb BruceMcF: > The problem with CP/M on the C128 is that the Z80 or 8080 before it > were never "clock cycle per memory access" processors, so running it > at 2MHz was silly ... running it at the 8Mhz "dot" clock or 4MHz "half > dot clock" with wait states to allow it to access the 2MHz memory bus > would have resulted in a much more useful system, at least if one had > the 1571 or 1581 disk drive. You mention a good point, C128-CP/M is INCREDIBLY slow. Using a 1541 was nearly 30 times slower than same-day Osbornes and for many, maybe most, the 1541 was the only choice because the 1570/71/81 came very late and was quite expensive. But also the computing power was pretty bad. An Amstrad/Schneider Joyce (maybe the CPCs too) running CP/M is six to eight times faster. The Joyce did costed a little bit more than a naked C128 but came with floppy, printer and screen. I remember that an Altair-clone outperformed the C128 nearly twice, running on a 2Mhz 8080. A slower version of a 1975 computer outperformes a 1985 system with nearly ten times more circuits build in... talk about epic fail :-) Still I have a C128 with a version of Turbo Pascal and Wordstar though I only gave a quick try for Turbo Pascal and rarely used Wordstar. Christian Brandt
From: Bill Buckels on 24 Mar 2010 06:27 On Mar 22, 3:45 pm, PK <f.ke...(a)LEVAMIlibero.it> wrote: > Hello, > please I would like to know if there is a reference site for CP/M > software for the C128.. > Why not visit my CP/M site... Welcome to the Wonderfully Ancient World of The C128 and C64 CP/M 80 Links Page http://www.cpm8680.com/cpmc64/ Regards, Bill Buckels http://en.wikipedia.org/wiki/User:Bill_Buckels http://www.cpm8680.com/ http://www.appleoldies.ca/ http://www.c64classics.ca/ http://www.aztecmuseum.ca/ http://www.teacherschoice.ca/ http://www.clipshop.ca/ http://www.grindstoneharbour.com
From: BruceMcF on 25 Mar 2010 00:02
On Mar 23, 9:20 pm, Christian Brandt <bran...(a)psi5.com> wrote: > Using a 1541 was nearly 30 times slower than same-day Osbornes and for > many, maybe most, the 1541 was the only choice because the 1570/71/81 > came very late and was quite expensive. Where was it that the 1571 and 1581 came very late? I recall the 1571 coming out alongside the C128. I can't imagine using the 1541 with a C128 unless using a 1581 as the main drive and the 1541 to run games. Indeed, my heaviest use of the C64 was in a system with a 1581 in the early 90's, with Big Blue Reader to sneaker net MS-DOS disks from the computer lab at school to work on at home. |