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Re: The CPMputer ;-)

Today I received a parcel with the casing for my planned do-it yourself computer. But still must wait more than a week for the PCB. In order to make it affordable I always choose the "8 working days delivery option" with my PCB manufacturer. And this gives me a very hard time, each time I ...
by no0207
Oct Wed 16, 2013 12:39 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: The CPMputer ;-)
Replies: 3
Views: 11640

Re: The CPMputer ;-)

Today I finalized the layout and ordered a prototype PCB. Now I have to be really patient - it will take 8 working days until I will receive the prototype...

Image
by no0207
Oct Mon 14, 2013 4:37 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: The CPMputer ;-)
Replies: 3
Views: 11640

The CPMputer ;-)

Recently I am playing around with a Z180 chip. First wanted to have it execute small pieces of test code to explore its behavior. At the very beginning of these experiments there was the question whether or not to use Eproms to provide program contents to the Z180 system. I did not like the idea at ...
by no0207
Oct Sun 06, 2013 5:09 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: The CPMputer ;-)
Replies: 3
Views: 11640

Re: did anyone of you already try this?

***FINALLY*** a parcel with a Z84C SIO/2 arrived today. The last missing chip. I was already somewhat in panic because it appeared so hard to get one. Ordered from different vendors. Guess soon it will rain SIOs over here ;) So this afternoon I began with the wiring. Half the way through it looks al...
by no0207
Jul Mon 15, 2013 11:40 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: The Grant Searle CP/M computer (almost 8 MHz!)
Replies: 2
Views: 11427

Re: did anyone of you already try this?

Almost one month gone, and not much progress with my exemplar of the Grant Searle CP/M Computer :( In fact it is difficult to get ahold of some Z84C chips (the fast CMOS version of the Z80 family). Ordered a CPU and a SIO/2 from Hongkong, after 3 Weeks of waiting I got 2 pieces of CPU instead :( Thi...
by no0207
Jul Fri 12, 2013 12:00 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: The Grant Searle CP/M computer (almost 8 MHz!)
Replies: 2
Views: 11427

Re: adaption of screen control sequences

Finally found the installation manual on bitsavers.org and made it to patch the terminal portion of WordStar 3.0 :) Just in case this would be of help for anyone else I post my "cheat sheet" for patching here: WordStar 3.0 Terminal Patches for the Altair 8800 micro. HITE: 28 WID: 50 CLEAD1...
by no0207
Jul Mon 08, 2013 11:36 am
 
Forum: Altair 8800 Micro
Topic: adaption of screen control sequences
Replies: 2
Views: 10399

adaption of screen control sequences

Sorry folks, still another question: Today I loaded a Wordstar 3.0 Version from retroarchive.org on my 8800micro + CP/M. With the installer I tried (almost) all the terminal types that it offers. VT100 not among the choices. None of them appears to produce a screen control that looks well on the 880...
by no0207
Jul Thu 04, 2013 2:40 pm
 
Forum: Altair 8800 Micro
Topic: adaption of screen control sequences
Replies: 2
Views: 10399

check sums for CP/M programs?

I did already ask that question in another forum recently and got that answer: there exist no unique check sums for CP/M programs. Because a CP/M program is always recorded in disk blocks, including some undefined data garbage between the end of the program and the end of the last block. Actually I ...
by no0207
Jul Wed 03, 2013 1:20 pm
 
Forum: Altair 8800 Micro
Topic: check sums for CP/M programs?
Replies: 1
Views: 4295

Re: And here's what the competitors are doing :-)

Thanks for this information, Jac! Very interesting interview - and very nice Altair box reconstruction! I enjoyed listening to that interview. However, at the point where Mr. Douglas stated his kit does not support the S-100 bus I got stuck with my thoughts. So then it is an expensive kit, just conc...
by no0207
Jun Wed 26, 2013 5:10 pm
 
Forum: Altair 8800 Micro
Topic: And here's what the competitors are doing :-)
Replies: 2
Views: 6238

A potential feature for future fimware ;)

Currently I am experimenting with an FPGA evaluation board. Still quite a "Newbie", trying to get the pieces of the puzzle together one by one... for a CP/M system running at least at 25 MHz ;) One of my recent experiments was to implement a VGA controller on FPGA which can display charact...
by no0207
Jun Wed 26, 2013 11:38 am
 
Forum: Altair 8800 Micro
Topic: A potential feature for future fimware ;)
Replies: 0
Views: 3728

The Grant Searle CP/M computer (almost 8 MHz!)

There is one tinkering technology that still fascinates me very much: Constructing things on a breadboard. That is how my personal experience with digital electronics began. These days I ran into the project page of Grant Searle's breadboard CP/M computer: http://searle.hostei.com/grant/cpm/ It look...
by no0207
Jun Thu 20, 2013 12:28 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: The Grant Searle CP/M computer (almost 8 MHz!)
Replies: 2
Views: 11427

Re: my easter-egg is rectangular this year ;)

Hi everyone! In the meantime I made some progress - learned the basics of Verilog and started developing some examples. Currently I am playing with a minimalistic CPU design - just google for MCPU. I am not the creator of that CPU concept, just implementing it on the above mentioned board, along wit...
by no0207
Jun Sun 02, 2013 7:11 am
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: my easter-egg is rectangular this year ;)
Replies: 1
Views: 13291

my easter-egg is rectangular this year ;)

There is one thing I wanted to get into for a while: how to program a FPGA. Short before this year's Easter I found an interesting (and cheap) board on ebay. Based on the Altera Cyclone II Chip. Ordered one and still got it before Easter. Board came from china and so did the (homebrew) CDs. First th...
by no0207
Mar Sun 31, 2013 1:33 pm
 
Forum: Venues, projects and off topic stuff - NO SPAM
Topic: my easter-egg is rectangular this year ;)
Replies: 1
Views: 13291

Re: configure the 8800micro for 80x25 text?

Thanks a lot!

Very good idea.
by no0207
Feb Tue 26, 2013 12:43 pm
 
Forum: Altair 8800 Micro
Topic: configure the 8800micro for 80x25 text?
Replies: 4
Views: 8129

configure the 8800micro for 80x25 text?

I was invited short term for an exhibition event for classical computers. Explicitely asked to show my built exemplar of the 8800micro there. What I have is a 8800micro with the virtual CP/M drive attached to a VGA screen. Must admit since I built it I did not yet find the time to extensively play w...
by no0207
Feb Sun 24, 2013 4:10 am
 
Forum: Altair 8800 Micro
Topic: configure the 8800micro for 80x25 text?
Replies: 4
Views: 8129
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