Can anyone tell me what the orginal monitor was in the Qberts? Was it horizontal or vertical and what the number is?
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I have 2 of them setting here and they are both vertical frames with 4900 monitors. I am pretty sure one of them is the origional monitor.
Yep.....my Q-Bert had a 4900 in it too....
Do you have sync problems with a newer monitor? If so...here might be a solution...it worked for me on my newer monitor.
From: Al Kossow ([email protected])
Subject: trivial QBert sync inversion hack
Newsgroups: rec.games.video.arcade.collecting
Date: 1998/10/13
Joe Britt and I came up with a trivial hack to convert Q*Bert
boards to negative sync, and lets you generate combined H/V
sync as well. It turns out that J14 (a 7407) is only used
as a sync buffer. Replace it with a 7406, which is an inverting
open collector buffer. The sync is then active low, and since
it is open collector, you can 'wire-or' the outputs and get
combined H/V sync.