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 ).
I'm going to go ZZZZzzzzz now, as have to be in London by 09:00 tomorrow...
Mark
Search found 757 matches
- 15 Sep 2014 22:38
- Forum: HARDWARE
- Topic: FDX 80 Column Fault - Video Question . . .
- Replies: 13
- Views: 14458
- 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
Mark
- 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...
- 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...
- 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
Mark
Well Done Dave
Mark
- 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, ...
- 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
Mark
- 27 Jul 2014 17:38
- Forum: MEMOFEST 2014
- Topic: Memofest 2014 - a bit of fun, with a serious side
- Replies: 7
- Views: 12669
Re: Memofest 2014 - a bit of fun, with a serious side
No bias then
Mark
Mark
- 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
Mark
As can Z80 based systems
Mark
- 25 Jul 2014 22:08
- Forum: INTRODUCE YOURSELF
- Topic: An Old Timer
- Replies: 7
- Views: 10587
Re: An Old Timer
Welcome on board Keith!
Mark
Mark