Search found 250 matches

by Crazyboss
22 Apr 2021 16:04
Forum: GENERAL DISCUSSIONS
Topic: Eye-watering ebay prices
Replies: 9
Views: 139

Re: Eye-watering ebay prices

Anybody seen this (admittedly nice) crazy buy-it-now auction on ebay? https://www.ebay.co.uk/itm/ULTRA-RARE-VINTAGE-MEMOTECH-MTX-512-COMPUTER-SYSTEM-MINT-/294120814264?_trksid=p2349624.m46890.l49286 Crazy, opportunistic or worth it? Personally, I think it's at the top end in terms of total package,...
by Crazyboss
19 Apr 2021 19:52
Forum: HARDWARE
Topic: Another dead Memotech - Can it be saved ?
Replies: 3
Views: 86

Re: Another dead Memotech - Can it be saved ?

I did a bit more testing, it seems like the Z80 and the VDP was dead, i checked the parts in another memotech. But the CTC. The VDP got very hot very fast, so I guess it was shorted. The pal board kind of work but gives gray scale picture, sometimes i get colors, but weird bars and sometimes some re...
by Crazyboss
19 Apr 2021 08:15
Forum: BOOKS, POSTERS, GAMECOVERS ETC.
Topic: Chess, Draughts and Toado posters.
Replies: 0
Views: 54

Chess, Draughts and Toado posters.

Mikael Anker Madsen have scanned some Continental Software Posters, they are now put at Mtxworld.dk and Archive.org Mtxworld.dk: Chess: http://www.mtxworld.dk/MemotechPosters/Chess%20-%20Memotech%20-%20Continental%20Software%20-%20Poster%202550x3506.png Draughts: http://www.mtxworld.dk/MemotechPoste...
by Crazyboss
18 Apr 2021 21:19
Forum: HARDWARE
Topic: Replacing a 4116 VRAM with a more reliable 4164 - Courtesy o
Replies: 8
Views: 5156

Re: Replacing a 4116 VRAM with a more reliable 4164 - Courtesy o

Hi. This trick also works for the 41256, but it seems like the 41128 chip have another layout. I have just done the same with a Texas and NEC branded 41256 today. The 41256 and 4164 should also run a bit cooler, since it use 5+ only. Hi Folks, as we know, the most common video problem with the MTX i...
by Crazyboss
18 Apr 2021 11:39
Forum: HARDWARE
Topic: Another dead Memotech - Can it be saved ?
Replies: 3
Views: 86

Another dead Memotech - Can it be saved ?

Yes another dead Memotech, not sure whats the story about this. Not sure if this board will be saved or for parts only, for sure some traces have to be fixed, and even that maybe there is a serious shortcut somewhere at the board causing this burned pcb. burnmtx1.jpg burnmtx2.jpg burnmtx3.jpg burnmt...
by Crazyboss
18 Apr 2021 00:07
Forum: HARDWARE
Topic: Take care when remove ics (Saved a VDP)
Replies: 6
Views: 118

Re: Take care when remove ics (Saved a VDP)

Dave did you fix that Memotech ? :lol:
by Crazyboss
17 Apr 2021 16:34
Forum: HARDWARE
Topic: Take care when remove ics (Saved a VDP)
Replies: 6
Views: 118

Take care when remove ics (Saved a VDP)

Hi. Just want to remind, take care when you remove socked chips from the MTX mainboard, those chips may not have been out for many years, and kind of stuck there. Today I ran into a problem, and I wanted to swap the VDP, suddenly I discovered on of the pin was broken, it was left in the Socket. When...
by Crazyboss
04 Apr 2021 21:39
Forum: OFF TOPIC
Topic: GMC6512-15 IC ?
Replies: 2
Views: 167

GMC6512-15 IC ?

Hi.

I found 4 pcs GCM6512-15 ics in my parts bin. But cant find any information about what it is. Anyone knows?

Its a narrow 32pin ic, I guess its a RAM or Flash IC ?
by Crazyboss
29 Mar 2021 14:55
Forum: NEW HARDWARE
Topic: "Disc" storage on a budget
Replies: 5
Views: 2878

Re: "Disc" storage on a budget

Did this project ever finished ?

Any prof. made pcbs around ?

What filesystem on the Compact Flash card?
by Crazyboss
15 Feb 2021 10:23
Forum: PROGRAMMING
Topic: Use of Assembler in MTX Basic.
Replies: 2
Views: 515

Use of Assembler in MTX Basic.

Hi there. I think it have been mentioned before, but when using Assembler in Basic, and you add or remove basic lines before the Assembler routines, it seems like the Basic dont "re-assemble". What is the best way to do this. To get it work yesterday I had to go into each of my assembly lines and do...