Search found 101 matches

by JonB
01 Jan 2016 16:44
Forum: PROGRAMMING
Topic: C & Assembler conundrum
Replies: 6
Views: 2368

C & Assembler conundrum

Here's a straightforward bit of programming for you! Consider the following C code: char *p; for ( p=Fileend; p>Curschar; p-- ) { *p = *(p-1); } What it does is move a block of memory from Curschar to Fileend one byte up (to open a place in a buffer for a character that's about to be inserted). I re...
by JonB
07 Sep 2015 17:29
Forum: CP/M
Topic: CP/M Boot Menu?
Replies: 4
Views: 2450

Re: CP/M Boot Menu?

You could get the menu program to inject the launch command direct into the CCP's command buffer then jump to the routine that interprets it.. Now that would be cool, but you would need to work out where everything is by disassembling the CCP and comparing with a copy of the source (such as the one ...
by JonB
26 May 2015 00:01
Forum: OFF TOPIC
Topic: What other retro machines do you have?
Replies: 26
Views: 7134

Re: What other retro machines do you have?

Quick update, I scored some more retro swag Another 48k Speccy Apple G4 iMac "lamp stand" G3 iMac "snow" Dual G4 PowerMac Tandy TRS-80 Model 4 128k, dual drives, hard drive via CF card Tandy TRS-80 Model II with 8" floppy A Multicomp (not retro, a sort of hardware emulation designed by Grant Searle)...
by JonB
04 May 2015 10:28
Forum: OFF TOPIC
Topic: Amazing homebrew ZX Spectrum & Amstrad CPC
Replies: 7
Views: 2134

Re: Amazing homebrew ZX Spectrum & Amstrad CPC

That's true Mark and as I recall no one was worried about waiting for orders to come in - it was the lack of communication after handing over your cash that worried people. If Zaxon's improved in this respect that can only be for the good.
by JonB
03 May 2015 20:32
Forum: OFF TOPIC
Topic: Amazing homebrew ZX Spectrum & Amstrad CPC
Replies: 7
Views: 2134

Re: Amazing homebrew ZX Spectrum & Amstrad CPC

Zaxon had an... errm... allegedly mixed reputation on the Atari forums with UltraSatan units. Just saying... Assuming it's the same guy.
by JonB
24 Feb 2015 20:24
Forum: REMEMOrizer
Topic: CP/M filesystem
Replies: 2
Views: 1177

Re: CP/M filesystem

CP/M 2.2 doesn't do them, no. CP/M Plus (3) does, I believe. You also get 16 user areas (0-15) which are sort of like directories. Sort of :) Anyway, thanks for confirming that. I am about to see if I can transfer my CP/M setup from the TRS-80 Model 4 to the Memotech. 512 files sounds limiting in th...
by JonB
23 Feb 2015 23:04
Forum: REMEMOrizer
Topic: CP/M filesystem
Replies: 2
Views: 1177

CP/M filesystem

Hi all

Quick question for you. What is the capability of the CP/M filesystem on REMemorizer? How many files, directories, users can it hold, and what's the macimum SD card size?

I know I shoukd know all this but I'm hoping someone can save me a trawl through the docs.

Cheers
JonB
by JonB
04 Oct 2014 16:25
Forum: GENERAL DISCUSSIONS
Topic: Suggestions
Replies: 19
Views: 5549

Re: Suggestions

We had this discussion about FB when the forum was set up.

I'd personally love to retire the FB group as, like Dave here, I think it's BAD (Facebook, not the group). Perhaps we should move it to another less privacy-invading social network.
by JonB
03 Sep 2014 21:41
Forum: GENERAL DISCUSSIONS
Topic: Another one lost...
Replies: 2
Views: 1475

Re: Another one lost...

Wasn't that one "I'm selling for a friend hence untested" or some such? In other words, may or may not work properly?

Of course Mark, you'd would have no trouble fixing it. Maybe the buyer wants to build a Kelly generator?
by JonB
04 Aug 2014 12:57
Forum: GENERAL DISCUSSIONS
Topic: All good things come to an end . . . . or do they?
Replies: 9
Views: 2336

Re: All good things come to an end . . . . or do they?

Mostly discrete logic chips... but I imagine, looking at what I have, that it is all programmable logic like GALs, no?

Do you have a list?