Excellent
You are not the only person to over clock Z80 CPU's. There are a number of other reports about this...
Mark
Search found 757 matches
- 09 Nov 2014 20:56
- Forum: What you are doing with Lez's "Free Stuff"?
- Topic: High Speed Z80 test Board
- Replies: 5
- Views: 8919
- 22 Oct 2014 14:59
- Forum: GENERAL DISCUSSIONS
- Topic: Website Search Engines
- Replies: 11
- Views: 14683
Re: Website Search Engines
Goes looking... Still looking... And looking... Scrolled down the page... All the way to the bottom... I'm sure he said that it was on this page :? Scrolled all the way to the top...(again!)... The trouble is, I had to search for it (the button)... I mean, putting it all the way over there to the le...
- 22 Oct 2014 10:32
- Forum: HARDWARE
- Topic: Another repair case, plase help if you can
- Replies: 34
- Views: 31429
Re: Another repair case, plase help if you can
That xls was great I finaly can say I figured out what I must do only a final question what to do with the already cuted tracks , and wiring ? leave them as is or restore them ? If you bend pin 20 of the EPROM up and and link to pin 22 using a wire on the EPROM pins, the track cuts and wiring shown...
- 21 Oct 2014 23:41
- Forum: HARDWARE
- Topic: Another repair case, plase help if you can
- Replies: 34
- Views: 31429
Re: Another repair case, plase help if you can
Details of how to use a 2764 or a 27128 EPROM without track cutting in the attachment.
Mark
Mark
- 21 Oct 2014 21:30
- Forum: GENERAL DISCUSSIONS
- Topic: Website Search Engines
- Replies: 11
- Views: 14683
Re: Website Search Engines
What! You must shout a bit louder, I am getting older you know...
Now what did you want me to do?
Mark
Now what did you want me to do?
Mark
- 21 Oct 2014 21:22
- Forum: HARDWARE
- Topic: Another repair case, plase help if you can
- Replies: 34
- Views: 31429
Re: Another repair case, plase help if you can
You may want to instead bend out the required EPROM legs and solder wires to them. This is a lot easier than trying to cut the tracks under the sockets that run on the top (component) side of the board. It also means that if the mask ROM chips are not causing the problem, you can plug them back in. ...
- 19 Oct 2014 21:03
- Forum: GENERAL DISCUSSIONS
- Topic: PD Software Library
- Replies: 0
- Views: 11236
PD Software Library
I have been reading through the scans of the Memotech MTX World published by The Software Source and there are various mentions of the PD Software Library for the MTX. Now I am not sure if this was just CP/M programs or what. Has anybody got any PD Software Library disks? Failing that, has anybody h...
- 18 Oct 2014 01:17
- Forum: HARDWARE
- Topic: Another repair case, plase help if you can
- Replies: 34
- Views: 31429
Re: Another repair case, plase help if you can
a small observation I just removed the "spain" rom or 1B most propely and the cut on the track was already there I inspect the other points that Mark mentions and all were already cut is this correct ? I'll have to get back to you on this... (I'm too tired to go back and work it out right...
- 17 Oct 2014 13:15
- Forum: HARDWARE
- Topic: Another repair case, plase help if you can
- Replies: 34
- Views: 31429
Re: Another repair case, plase help if you can
I have a friend with an Willem programmer he can help me with the eproms from what I saw from the photos it is more easy to cut the track and solder the wires than all 16 Ic sockets I soldered so far so I give it a try ,from what I saw only 1 track cut on ROM 1B and rest wired from under side right...
- 16 Oct 2014 21:36
- Forum: HARDWARE
- Topic: Another repair case, plase help if you can
- Replies: 34
- Views: 31429
Re: Another repair case, plase help if you can
... and one question : will be worth to desolder the "Spain" rom ? No. I would not rush to judgement on the ROMs. Mask ROM chips are normally fairly reliable. And unless you can program EPROMs (or EEPROMs) and you cut tracks and rewire the pins that are different, they are not easy to rep...