Search found 758 matches
- 09 Jan 2015 23:45
- Forum: OFF TOPIC
- Topic: Computer Chips from yesteryear
- Replies: 2
- Views: 3890
Re: Computer Chips from yesteryear
Yes, yes, yes, no!!! :shock: RAM :? That is the thing. Lots of fast RAM was expensive. Add to that the costly video chips... To enable easy, fast access, video RAM that was in part of the CPU's memory map was preferred. But that caused problems. Now a CPU was not something that could be left out, an...
- 07 Jan 2015 13:00
- Forum: NEW HARDWARE
- Topic: MTX+ Running BASIC
- Replies: 13
- Views: 15050
Re: MTX+ Running BASIC
I've just looked at the pictures again (last time, I was on a mobile ithingy device). Now I'm sure that Master is calling the shots :lol: Mark The Master that has been cleverly modified to run with the power off.... Actually the Master has a Gig or so of CF storage hanging off the back. It would be...
- 05 Jan 2015 00:05
- Forum: NEW HARDWARE
- Topic: MTX+ Running BASIC
- Replies: 13
- Views: 15050
Re: MTX+ Running BASIC
I've just looked at the pictures again (last time, I was on a mobile ithingy device).
Now I'm sure that Master is calling the shots
Mark
Now I'm sure that Master is calling the shots
Mark
- 30 Dec 2014 01:09
- Forum: HARDWARE
- Topic: Z80 Special Reset
- Replies: 2
- Views: 4029
Re: Z80 Special Reset
I did wonder how the IDE worked. I presume (not found time to read up yet) it uses the Special Reset. Somewhere in a technical question and answer section, Zilog say that really, the external control inputs should be considered to be synchronous (I think Reset was one input that was being referred t...
- 24 Dec 2014 18:59
- Forum: GENERAL DISCUSSIONS
- Topic: Merry Christmas
- Replies: 15
- Views: 16633
Re: Merry Christmas
Best wishes to all MTX'ers, have a happy Christmas and a great New Year
Mark
Mark
- 22 Dec 2014 01:25
- Forum: NEW HARDWARE
- Topic: MTX+ Running BASIC
- Replies: 13
- Views: 15050
Re: MTX+ Running BASIC
A short spay of WD40 may help to sort that outMartin A wrote:Printer output tested and running to spec.
Shame about the output, that was a previously un-opened ribbon, I guess 25 years in storage has taken it's toll on the ink, sealed or not.
Mark
- 10 Dec 2014 16:34
- Forum: GENERAL DISCUSSIONS
- Topic: When and How did you rediscover Memotech ?
- Replies: 7
- Views: 9199
Re: When and How did you rediscover Memotech ?
Did you choose a MTX for any particular reason? Was this, did this change once the first exciting play time with the machine end? That is, after a few weeks were you using it for the same thing that it was obtained for? Or did the "educational" very quickly become "games machine"...
- 10 Dec 2014 16:30
- Forum: GENERAL DISCUSSIONS
- Topic: When and How did you rediscover Memotech ?
- Replies: 7
- Views: 9199
Re: When and How did you rediscover Memotech ?
Did anyone play with / use / get Memotech ZX81 expansions before they got a MTX?
Did this help in the choice of getting a MTX?
Mark
Did this help in the choice of getting a MTX?
Mark
- 26 Nov 2014 03:33
- Forum: GENERAL DISCUSSIONS
- Topic: Please Check legacy ICs before use .
- Replies: 5
- Views: 7149
Re: Please Check legacy ICs before use .
Yes, the undocumented OUT (C),0 has been known about for a while. This and this are two documents that give details
You may also want to have a read of this PDF: Z80 Family Questions and Answers
Mark
You may also want to have a read of this PDF: Z80 Family Questions and Answers
Mark
- 17 Nov 2014 02:49
- Forum: HARDWARE
- Topic: Another repair case, plase help if you can
- Replies: 34
- Views: 31539
Re: Another repair case, plase help if you can
When they fail, zener diodes normally go short circuit. What do you have on either side of resistor R60 (1k ohm) {don't get confused with R62, the board markings are not very helpful}. Or you can test on D16 or D18 anode leads. If the voltage on D16 or D18 anode leads is heathy (about -12V) and R60 ...