Search found 574 matches

by 1024MAK
07 Feb 2013 20:26
Forum: GENERAL DISCUSSIONS
Topic: Design your own 20MHz Z80 microsystem.. MTX PLUS !!
Replies: 10
Views: 5193

Re: Design your own 20MHz Z80 microsystem.. MTX PLUS !!

I'm planning (or maybe that should be thinking about) building a simple Z80 based system. It would not be compatible with a MTX though. It would have SRAM, EPROM (or flash ROM), a serial port (using a Zilog serial chip), it would use a 4 line LCD as a display. No plans for any modern interfaces. Ala...
by 1024MAK
01 Feb 2013 16:59
Forum: GENERAL DISCUSSIONS
Topic: Drowning under a sea of SPAM!
Replies: 5
Views: 2432

Re: Drowning under a sea of SPAM!

Hi Guys. Yes I had a lot of spammers, I cleaned most out. I am going to put a option where people have to be approved by admin, it have to stop :) Thanks Great! Thanks, much better! http://www.atari-forum.com/images/smilies/cheers.gif http://www.stardot.org.uk/forums/images/smilies/eusa_clap.gif ht...
by 1024MAK
31 Jan 2013 00:53
Forum: GENERAL DISCUSSIONS
Topic: Drowning under a sea of SPAM!
Replies: 5
Views: 2432

Re: Drowning under a sea of SPAM!

Although it requires more work for an administrator or moderator, one way to reduce spam, is for new members to be required to enter a reason why they want to join and to give a short history of their own retro computing hobby. If what they say sounds like it has been written by a human with an inte...
by 1024MAK
22 Jan 2013 03:16
Forum: GENERAL DISCUSSIONS
Topic: Hello from a new member
Replies: 29
Views: 10206

Re: Hello from a new member

Um, maybe John thought 512 meant 512k :mrgreen:

Mark

On RAM, see also this thread
by 1024MAK
18 Jan 2013 03:30
Forum: GENERAL DISCUSSIONS
Topic: Hello from a new member
Replies: 29
Views: 10206

Re: Hello from a new member

Welcome John!

Glad you found your way here :D

Mark
by 1024MAK
18 Jan 2013 03:27
Forum: HARDWARE
Topic: It works !
Replies: 5
Views: 2512

Re: It works !

Excellent work! Glad that you have made good progress :D As it seems common for MTX's to be marked / cased as MTX512 , but to have 32k DRAM chips, I wonder if they were suppose to be sold with the 32k memory board. But if so, where are all these memory boards? I suppose some of the MTX512's with MTX...
by 1024MAK
15 Jan 2013 03:20
Forum: HARDWARE
Topic: Power supply
Replies: 12
Views: 4745

Re: Power supply

Actually old DRAM is fairly power hungry :( Still thinking about this. The problem is:- (1) the 16k DRAM chips used for the video RAM needs +12V, +5V and -5V and all three need to power up at the same time (or in the correct order), (2) the rectifier system is a number of half-wave types back to bac...
by 1024MAK
14 Jan 2013 02:19
Forum: HARDWARE
Topic: Power supply
Replies: 12
Views: 4745

Re: Power supply

Okay, found time to do some measurements on one of my MTX's. The MTX is a "standard" MTX500 with no modifications or extras. These results are all from a faulty machine (I just get a continuous tone on the sound and no display) as it does not have a keyboard attached, but the power supply section is...
by 1024MAK
13 Jan 2013 20:29
Forum: REMEMOrizer
Topic: Use with RS232 board connected?
Replies: 3
Views: 2231

Re: Use with RS232 board connected?

Hmm, I have a MTX512 S2 that came with a SDX drive fixed to it. The machine has a combined serial RS232 & 80 col. board inside. Not that I have got the computer and drive to work yet... Are we saying the there was a mistake in the original PAL programming on the original serial boards? Edit: after r...