Search found 757 matches

by 1024MAK
15 Sep 2014 22:38
Forum: HARDWARE
Topic: FDX 80 Column Fault - Video Question . . .
Replies: 13
Views: 14458

Re: FDX 80 Column Fault - Video Question . . .

I suggest you try a range of different numbers to see if there is a pattern (as in binary number patten, not a colourful screen :P ).

I'm going to go ZZZZzzzzz now, as have to be in London by 09:00 tomorrow...

Mark
by 1024MAK
14 Sep 2014 22:31
Forum: HARDWARE
Topic: FDX 80 Column Fault - Video Question . . .
Replies: 13
Views: 14458

Re: FDX 80 Column Fault - Video Question . . .

Dave, for fault finding this problem, well, it's a job for Mr oscilloscope. Do you have a good one (25MHz or higher dual channel) ?

Mark
by 1024MAK
14 Sep 2014 22:22
Forum: HARDWARE
Topic: FDX 80 Column Fault - Video Question . . .
Replies: 13
Views: 14458

Re: FDX 80 Column Fault - Video Question . . .

The MC6845P (UA4) does not read or write screen data as such. It provides timing, address and row signals. The character RAM (UC9) is only 2k bytes. It only stores the ASCII codes for the characters currently on the screen. When a character is required to be displayed, the circuit has to use the ASC...
by 1024MAK
01 Sep 2014 23:13
Forum: GENERAL DISCUSSIONS
Topic: Another one lost...
Replies: 2
Views: 4289

Another one lost...

So near, but not near enough :? :( I bid a fairly high amount, but someone was more desprate to pay £522 at the last few seconds than I was... Even more annoying, the seller is within driving range. Oh well. Mark MTX512, FDX and Memotech printer http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/dm4AAOSwDk5T8...
by 1024MAK
08 Aug 2014 22:40
Forum: HARDWARE
Topic: MTX500 upgrades....
Replies: 6
Views: 12528

Re: MTX500 upgrades....

Clap, clap, clap (never the right smilie is there...).
Well Done Dave 8-)

Mark
by 1024MAK
01 Aug 2014 14:08
Forum: GENERAL DISCUSSIONS
Topic: All good things come to an end . . . . or do they?
Replies: 9
Views: 8806

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

I'm going to keep quiet his time. Thanks to Lez's previous giveaways, I have enough "projects" to last for years. I just need the time to finish them. Hmm, it's a shame you cant get an "Early Retirement Chip" :D What he said ^ (well apart from it's a bit early for me to retire, ...
by 1024MAK
31 Jul 2014 23:33
Forum: GENERAL DISCUSSIONS
Topic: All good things come to an end . . . . or do they?
Replies: 9
Views: 8806

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

Why does the phrase "DFS sale" spring to mind... :?

Mark
by 1024MAK
26 Jul 2014 22:32
Forum: OFF TOPIC
Topic: Homebrew PS/2 Keyboard reader
Replies: 2
Views: 4250

Re: Homebrew PS/2 Keyboard reader

PIC microcontrollers can do this job as well.
As can Z80 based systems :mrgreen:

Mark
by 1024MAK
25 Jul 2014 22:08
Forum: INTRODUCE YOURSELF
Topic: An Old Timer
Replies: 7
Views: 10587

Re: An Old Timer

Welcome on board Keith!

:D :D :D

Mark