Broken motherboard trace causing keyboard issues?

McArti0 · 07:00, 28 March 25

Long grounded pin13 AY is.... Press SPACE.
This is equal to cross pin1 LS145 and pin13 AY.
The CPC firmware has been written so that pin1 of the LS145 is Lo at all times between keyboard scans.

NoMoreGreenScreen · 09:29, 28 March 25

Its the weekend soon

so will have time to take a look at both what you and @Bryce have suggested. What do you mean by 'pin 13 may be ending'?
Thanks
NM

McArti0 · 09:54, 28 March 25

Quote from: NoMoreGreenScreen on 09:29, 28 March 25What do you mean by 'pin 13 may be ending'?

Maybe there won't be enough for your brother-in-law.

McArti0 · 17:33, 28 March 25

Quote from: McArti0 on 07:00, 28 March 25Long grounded pin13 AY is.... ~~Press SPACE.~~

My bad. No its Cursor Right

NoMoreGreenScreen · 20:48, 29 March 25

@Bryce - seems some games are not loading. Typically what happens is the games loading screen doesn't get drawn draw and that is the indicator that the game wont start (just sits on the then the game just sits there after the loading finishes, as if waiting for more data to load. Other games are fine, draw the loading screen and the game starts - its the same games that work and the same games that dont. The games that dont work, did before i did the shorting thing. Have cleaned the heads on the tape head and it hasn't helped. I checked the keyboard ribbon connectors and I think the bit 1 line is slightly crimped, however I did clean the end of both ribbons with rubbing alcohol and that took the keys from not working to working.

@McArti0 - all the keys work now, but they didnt work when i was shorting 6 and 13 with the machine on till i had cleaned the keyboard ribbons as above. That includes cursor right and all joystick movements. It is early days though as I only did it a short while ago.

Bryce · 18:58, 30 March 25

Quote from: NoMoreGreenScreen on 20:48, 29 March 25@Bryce - seems some games are not loading. Typically what happens is the games loading screen doesn't get drawn draw and that is the indicator that the game wont start (just sits on the then the game just sits there after the loading finishes, as if waiting for more data to load. Other games are fine, draw the loading screen and the game starts - its the same games that work and the same games that dont. The games that dont work, did before i did the shorting thing. Have cleaned the heads on the tape head and it hasn't helped. I checked the keyboard ribbon connectors and I think the bit 1 line is slightly crimped, however I did clean the end of both ribbons with rubbing alcohol and that took the keys from not working to working.

@McArti0 - all the keys work now, but they didnt work when i was shorting 6 and 13 with the machine on till i had cleaned the keyboard ribbons as above. That includes cursor right and all joystick movements. It is early days though as I only did it a short while ago.

Ok, but if some games are loading, then it's not an AY issue.

Bryce.

NoMoreGreenScreen · 10:16, 01 April 25

Thanks Bryce...

Well, its time for this thread to slowly drop down the list as I took the machine to my brother in law on Sunday and I think he ws really taken back and is looking to see if he can start coding again in z80 - the cpc is what started his career so I really appreciate everyone who helped me get the CPC to the place where he can no use it - special thanks going to @McArti0 and @Bryce .

I have got the Amstrad bug though, so I may well be back on these boards sooner than later!!

McArti0 · 10:41, 01 April 25

So your brother-in-law will write about the keyboard not working in another thread...

Ok.

NoMoreGreenScreen · 11:11, 01 April 25

Well, I hoe not - it was consistently working but if it does fail, i have some patch wire to donate

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Broken motherboard trace causing keyboard issues?