Thanks Chiron, I will try that out
From: Chiron Bramberger
Sent: January 15, 2021 2:58 PM
To: torontocbm@xxxxxxxxxxxxx
Subject: [torontocbm] Re: Commodore PET 4032 - Bootup Issue
Sounds like a problem with the kernal or basic. Either directly because those
ROMs aren’t working properly or indirectly because some other chip isn’t
working properly.
You can test the cpu 6502 and via 6522 in a Vic-20 if you have one and
everything is socketed. That might help rule in or out those chips.
Sent from my iPhone
On Jan 15, 2021, at 2:54 PM, Simon Z <dmarc-noreply@xxxxxxxxxxxxx> wrote:
Yes I can type , so other things are working.
From: Chiron Bramberger
Sent: January 15, 2021 2:21 PM
To: torontocbm@xxxxxxxxxxxxx
Subject: [torontocbm] Re: Commodore PET 4032 - Bootup Issue
It’s dropping into the monitor - but can you use the monitor? If it works then
that tells you the keyboard and other things are working.
Sent from my iPhone
On Jan 14, 2021, at 7:39 PM, Simon Z <dmarc-noreply@xxxxxxxxxxxxx> wrote:
Hello Tpug,
Been working on fixing the pets I have since we are in lockdown
now and I have been putting it off for a while. I am currently working on a
Commodore PET 4032 which chirps and boot up to the screen attached to this
email.
What has been tested so far:
- Memory is good
- CPU is good
- 901465-22 is good
- 901447-10 is good
Any help is appreciated
Thanks
Simon
<4032.jpg>
