Search found 36 matches

by acsi
31 Dec 2021 13:01
Forum: REMEMOTECH
Topic: REMEMOTECH as a MiSTer core?
Replies: 6
Views: 1233

Re: REMEMOTECH as a MiSTer core?

This may be of interest to you

https://misterfpga.org/viewtopic.php?t=248

I have a DE1 with Rememotech on it and a DE1-SOC which has some cores ported to it.
Just waiting for the DE10 NANO to become available again.
by acsi
19 Dec 2021 21:24
Forum: HARDWARE
Topic: Fading Composite output
Replies: 4
Views: 879

Re: Fading Composite output

Yep its all good now. Played Escape from Zarcos for around 30 minutes with no further issues so it must have been the LM1889 at fault. :D
by acsi
19 Dec 2021 10:39
Forum: HARDWARE
Topic: Fading Composite output
Replies: 4
Views: 879

Re: Fading Composite output

OK while typing the previous message I remembered that I have a dead 48K Spectrum board (tracks lifted) which has a LM1889N on it. Bit of desoldering and swapped them over and it's been running fine for the last 10 minutes. :D Excellent finally I may get to put the lid on it and leave it there. :lol:
by acsi
19 Dec 2021 09:46
Forum: HARDWARE
Topic: Fading Composite output
Replies: 4
Views: 879

Fading Composite output

Hi So the CFXII is purring along nicely however after all the work changing caps and getting the machine back up and running I now find that after around 5 minutes the composite output has faded out and the TV has lost signal. As part of recapping the motherboard I recapped the video board and every...
by acsi
27 Oct 2021 20:42
Forum: REMEMOTECH
Topic: It lives and what a great piece of equipment
Replies: 2
Views: 872

Re: It lives and what a great piece of equipment

This one puts it into better perspective :D

Here it is at the meeting. The MTX512 was not behaving and would loose all video output after around 10 minutes :evil:

Image
by acsi
21 Oct 2021 06:01
Forum: REMEMOTECH
Topic: It lives and what a great piece of equipment
Replies: 2
Views: 872

It lives and what a great piece of equipment

So Because of HexTrain I got hooked and purchased a DE1 board from Mouser who still have some. After getting frustrated with Quartus mainly due to expired certificates on the drivers with 13.1 I just used the programmer and the pre compiled files. And its a brilliant piece of work Andy. I absolutely...
by acsi
30 Sep 2021 11:07
Forum: HARDWARE
Topic: CFXII - Black screen with it plugged in
Replies: 53
Views: 10501

Re: CFXII - Black screen with it plugged in

Thanks guys. Yes I've learnt heaps. Especially with the Logic Board today. Also I know understand the CFXII board a lot more. Also it pushed me to upgrade it :lol: Yes hindsight is a fantastic thing. I might try putting the old Propeller chip and serial eprom back in to see if they work but that can...
by acsi
30 Sep 2021 10:46
Forum: HARDWARE
Topic: CFXII - Black screen with it plugged in
Replies: 53
Views: 10501

Re: CFXII - Black screen with it plugged in

I would source an S04, now that you have the socket, it’s an easy replacement
Thanks I will certainly try and find one. And thanks to you and Martin for all your help, it's been really appreciated and without it I probably would have given up ages ago.
by acsi
30 Sep 2021 10:20
Forum: HARDWARE
Topic: CFXII - Black screen with it plugged in
Replies: 53
Views: 10501

Re: CFXII - Black screen with it plugged in

Removed the old chip and put in a socket. Found a PC74HCT04P I already had. Took a chance its specs are close enough https://i.ibb.co/rfRMVJR/IMG-3256.jpg And now to switch on the power and... We have VGA output :D https://i.ibb.co/cwL6RTJ/IMG-3255.jpg Sound is also now working correctly I am now a ...
by acsi
30 Sep 2021 09:13
Forum: HARDWARE
Topic: CFXII - Black screen with it plugged in
Replies: 53
Views: 10501

Re: CFXII - Black screen with it plugged in

Hmm that chips been changed before by the looks of it. Currently its a 74HCU048I.