Search found 758 matches
- 04 Oct 2014 19:08
- Forum: GENERAL DISCUSSIONS
- Topic: MTX User Community - The way forward
- Replies: 5
- Views: 7664
Re: MTX User Community - The way forward
In my opinion, the best long term location for technical info is collated on somewhare like Dave's website, which is why I have often encouraged him to post some of my stuff. But then I don't have to do the job of maintaining it :) . Is it possible to add a wiki to the forum? A properly designed (a...
- 04 Oct 2014 18:59
- Forum: GENERAL DISCUSSIONS
- Topic: MTX User Community - The way forward
- Replies: 5
- Views: 7664
Re: MTX User Community - The way forward
My views are here ... Here are some good examples of retro computer communities where forums are well used:- StarDot (Acorn computers including the BBC Micro) Atari-Forum (Atari ST and related computers) World of Spectrum (Sinclair ZX Spectrum and clones) Sinclair ZX World (ZX80, ZX81, Timex 1000 an...
- 03 Oct 2014 15:06
- Forum: GENERAL DISCUSSIONS
- Topic: Suggestions
- Replies: 19
- Views: 20223
Re: Suggestions
In all the forums that run the same software as this one (phpBB), I just just the " View active topics " link available from all forum home/main index pages, and in this forum (and most others) available at the top of all pages. A good link to bookmark :mrgreen: For the less busy forums, I...
- 28 Sep 2014 11:47
- Forum: NEW HARDWARE
- Topic: V9958 on an MTX
- Replies: 23
- Views: 32425
Re: V9958 on an MTX
Nice
Keep them updates coming
Mark
Keep them updates coming
Mark
- 24 Sep 2014 15:48
- Forum: HARDWARE
- Topic: Node Ring Connections
- Replies: 6
- Views: 6965
Re: Node Ring Connections
Bill, I agree 100%. At every impedance mis-match, reflections of the signal will occur including at the combined termination of the receiver chip and 1k resistor that I suggested. However, if the driver chip includes a 300 ohm resistance in the output, and the output is current limited to 10mA (shor...
- 24 Sep 2014 06:38
- Forum: HARDWARE
- Topic: Node Ring Connections
- Replies: 6
- Views: 6965
Re: Node Ring Connections
@ Dave, I think you misunderstood my earlier post. I was just pointing out for the benefit of the people who do not know, that RS232 can go further than a lot of them think. Right, now most RS232 driver chip outputs include a 300 ohm resistance. Also some have outputs that limit the short circuit ou...
- 23 Sep 2014 08:51
- Forum: HARDWARE
- Topic: FDX 80 Column Fault - Video Question . . .
- Replies: 13
- Views: 14652
Re: FDX 80 Column Fault - Video Question . . .
@ Dave - anymore testing done?
Mark
Mark
- 23 Sep 2014 08:49
- Forum: HARDWARE
- Topic: Node Ring Connections
- Replies: 6
- Views: 6965
Re: Node Ring Connections
Driver chips, designed for RS232 have to be current limited to meet the specification. The distance a RS232 link can work reliably is inversely proportional to the baud rate (or more correctly, the bps rate). So at lower speeds, using twisted pair screened cable, it is possible to have a link 1/4 mi...
- 22 Sep 2014 00:42
- Forum: NEW HARDWARE
- Topic: V9958 on an MTX
- Replies: 23
- Views: 32425
Re: V9958 on an MTX
I think the answer to Dave's question is: down the back of a sofa?
Well done Martin.
Now does this mean we get a colour version of textinvaders?
Mark
Well done Martin.
Now does this mean we get a colour version of textinvaders?
Mark
- 21 Sep 2014 03:33
- Forum: HARDWARE
- Topic: Building a replacement MTX PSU
- Replies: 166
- Views: 203306
Re: Building a replacement MTX PSU
Outputs: Two 7.5V AC feeds (for feeding to the diodes that in turn go to the +5V regulator and the -5V zener diode supply circuitry) One +16V DC feed, for feeding to one of the diodes that in turn supplies the +12V regulator. The +16V DC supply is generated by a LM2577 based step up DC to DC convert...