Search found 27 matches

by gregctaylor
Sat May 18, 2019 5:52 pm
Forum: Off-topic
Topic: Private Messages stuck in Outbox
Replies: 3
Views: 866

Re: Private Messages stuck in Outbox

Thanks, shall remember that. Been trying to contact John Edwards of the Sharp Users Club.
by gregctaylor
Fri May 17, 2019 2:55 pm
Forum: Off-topic
Topic: Private Messages stuck in Outbox
Replies: 3
Views: 866

Private Messages stuck in Outbox

Anyone know why this is happening? Nothing in the Sent items folder.

Greg
by gregctaylor
Sun Feb 24, 2019 10:19 pm
Forum: Hardware
Topic: Still faulty 80K
Replies: 20
Views: 4561

Re: Still faulty 80K

Whoops! Yes, Z80! I could say I was confused as I am also fixing a ZX80 but that might not take to a 6502 either. :D
by gregctaylor
Sun Feb 24, 2019 7:59 pm
Forum: Hardware
Topic: Still faulty 80K
Replies: 20
Views: 4561

Re: Still faulty 80K

New monitor ROM, swapped out for a newer 6502, no difference so replaced the old one. Also swapped out the 8253 which had some very irregular waveforms on its output.
by gregctaylor
Sun Feb 24, 2019 3:07 pm
Forum: Hardware
Topic: Still faulty 80K
Replies: 20
Views: 4561

Re: Still faulty 80K

Hi, Have checked, I replaced both the video RAM chips before Christmas. Pressing SG <CR> produced no sound, nor if I tried it again. Volume is on maximum.

Any other ideas? I shall get back to the service manual tests to see if that gives me anything else.

Greg
by gregctaylor
Sat Feb 23, 2019 10:17 pm
Forum: Hardware
Topic: Still faulty 80K
Replies: 20
Views: 4561

Re: Still faulty 80K

Thanks for that. I gave up over Christmas but it is time I started again. I am determined to get it fixed. Something serious had happened to the computer. I had no crystal clock (now fixed) and no clock from the 555 timer (also now fixed). I can now see clocks throughout the CPU and graphics systems...
by gregctaylor
Tue Feb 19, 2019 3:32 pm
Forum: Hardware
Topic: DIsk Drive Cables
Replies: 1
Views: 656

Re: DIsk Drive Cables

I thought it was just a 34 pin TE connection, same pitch as an IDE ribbon off an old computer. Only snag is I think they had the missing pin (to stop you plugging in the wrong way around) at a different point but you can get the cables with all pins wired to get around that. Try someone like RS Comp...
by gregctaylor
Sun Aug 12, 2018 7:07 pm
Forum: Hardware
Topic: Still faulty 80K
Replies: 20
Views: 4561

Re: Still faulty 80K

About £15 plus insurance dependant on value but that is free up to £50.
by gregctaylor
Sun Aug 12, 2018 4:01 pm
Forum: Hardware
Topic: Still faulty 80K
Replies: 20
Views: 4561

Re: Still faulty 80K

Another gripping instalment! For those not in the know (me included until a little while ago), most home computers of the time used the system clock for everything, dropping clock frequencies by additional chips or by using the processor itself to time things. The Sharps are quite different. They us...
by gregctaylor
Sat Aug 04, 2018 3:43 pm
Forum: Hardware
Topic: SANYO TRC-1148 Recording volume
Replies: 1
Views: 1146

Re: SANYO TRC-1148 Recording volume

I assume you are connecting the computer earphone out to the tape recorder microphone in? The output is WAY too high. On my laptop, I have the earphone output set to between 3 and 5 (Windows 10) so extremely low. If you are intending to save to tape so you can then play on a physical computer (eg MZ...