Search found 569 matches

by 1024MAK
31 Aug 2019 13:56
Forum: MEMOFEST 2019
Topic: Memofest 2019 at Andys
Replies: 13
Views: 895

Re: Memofest 2019 at Andys

Well, I’ll be going ;)

Mark
by 1024MAK
23 Aug 2019 21:15
Forum: OFF TOPIC
Topic: Another Home-Brew - Z180
Replies: 27
Views: 1897

Re: Another Home-Brew - Z180

See also this site.

Mark
by 1024MAK
23 Aug 2019 20:55
Forum: OFF TOPIC
Topic: Another Home-Brew - Z180
Replies: 27
Views: 1897

Re: Another Home-Brew - Z180

I read the datasheet as: Z8S180 3.3V or 5V, 20MHz (or lower speed) operation. 5V, 33MHz operation. Z8L180 3.3V 20MHz (maximum) operation. I’m guessing that the S in the part number means high Speed, and the L in the part number means Low voltage operation, but have not found any Zilog documentation ...
by 1024MAK
17 Aug 2019 09:47
Forum: OFF TOPIC
Topic: Homebrew DIY SAM Coupe ?
Replies: 15
Views: 1746

Re: Homebrew DIY SAM Coupe ?

Sounds interesting, I’ll have to visit your site more often.

By the way, you need to include the full link otherwise the forum thinks you are linking to another page on this site, so use http://www.samcoupe.com in the link tags ;-)

Mark
by 1024MAK
15 Jul 2019 16:59
Forum: OFF TOPIC
Topic: Alan Turing to appear on new £50 note
Replies: 0
Views: 482

Alan Turing to appear on new £50 note

Alan Turing to appear on new £50 note Quoting RetroTechie from World of Spectrum forums : Great when a giant of science & technology is honored this way: https://www.bankofengland.co.uk/news/2019/july/50-pound-banknote-character-announcement Just for laughs, they should wait until the note is 6-12 m...
by 1024MAK
14 Jul 2019 19:11
Forum: GENERAL DISCUSSIONS
Topic: MTX 512 (debugging thread)
Replies: 48
Views: 3679

Re: MTX 512 (debugging thread)

The left most voltage regulator is a 7812 and provides the +12V rail. The middle voltage regulator is a 7805 and with a TIP2955 helps provides the +5V rail. The right most device is not a voltage regulator, but a power transistor. This is a TIP2955. It boosts the current to increase the available cu...
by 1024MAK
12 Jul 2019 19:17
Forum: GENERAL DISCUSSIONS
Topic: MTX on the road.
Replies: 6
Views: 525

Re: MTX on the road.

👍 👏 8-) :D

Mark
by 1024MAK
07 Jul 2019 19:32
Forum: GENERAL DISCUSSIONS
Topic: MTX 512 (debugging thread)
Replies: 48
Views: 3679

Re: MTX 512 (debugging thread)

The key-switches used suffer from similar problems to the keyboard switches as used on Acorn Electrons, BBC Micros and BBC Masters. The contacts inside become dirty, or a thin layer of oxide forms on the contacts. This results in either, the contacts not making electrical contact, or making intermit...
by 1024MAK
07 Jul 2019 09:15
Forum: NEW HARDWARE
Topic: ROTT 1600
Replies: 1
Views: 468

Re: ROTT 1600

Or ROTTon name :lol:

Good luck with testing :D

Mark
by 1024MAK
24 Jun 2019 15:37
Forum: PROGRAMMING
Topic: Bootstrap and boot blocks
Replies: 99
Views: 6171

Re: Bootstrap and boot blocks

I’m watching this with great interest :mrgreen:

Mark