Search found 3480 matches

by exxos
Fri Oct 19, 2018 11:17 pm
Forum: STF REMAKE PROJECT
Topic: Video driver thoughts
Replies: 20
Views: 196

Re: Video driver thoughts

GND (top) layer, nice solid route under and around the DAC... gp1.jpg VCC (bottom) layer... bl1.jpg I added in 2 more caps on VCC pins of the DAC since they are in stupid places.. Digital & analouge ended up mixed up as a result of it all.. but All likely better router than on the Falcon anyway. EDI...
by exxos
Fri Oct 19, 2018 10:18 pm
Forum: STF REMAKE PROJECT
Topic: Video driver thoughts
Replies: 20
Views: 196

Re: Video driver thoughts

rpineau wrote:
Fri Oct 19, 2018 10:12 pm
Works for me .. I think the datasheet is probable more accurate than what was done on the falcon :)
Hopefully :) Easy to bridge them over if needs be anyway.
by exxos
Fri Oct 19, 2018 10:08 pm
Forum: HARDWARE ISSUES
Topic: Exxos STE RAM Upgrade - machine sees only 2 mb
Replies: 9
Views: 87

Re: Exxos STE RAM Upgrade - machine sees only 2 mb

I forgot to say I looked at your returned one. It looks like the solder has "ripped" on one end of the simm.. the boards are a bit fragile (bendy) so that can happen if not careful when inserting them.
by exxos
Fri Oct 19, 2018 10:02 pm
Forum: STF REMAKE PROJECT
Topic: Video driver thoughts
Replies: 20
Views: 196

Re: Video driver thoughts

I'm not sure about C1, C2 and C3 inline with RGB, the Falcon has 75 ohm resistors inline to match standard line impedance for video signals. Are you doing this to eliminate any potential DC in the signal ? I'm doing it because that what it says in the datasheet.... I to am not sure why the falcon i...
by exxos
Fri Oct 19, 2018 9:44 pm
Forum: STF REMAKE PROJECT
Topic: Video driver thoughts
Replies: 20
Views: 196

Re: Video driver thoughts

More of a final draft...

s2.png
s2.png (60.73 KiB) Viewed 21 times


..with something like this...

p1.jpg
p1.jpg (136.62 KiB) Viewed 16 times
by exxos
Fri Oct 19, 2018 9:40 pm
Forum: STF REMAKE PROJECT
Topic: Video driver thoughts
Replies: 20
Views: 196

Re: Video driver thoughts

Forgottenmyname wrote:
Fri Oct 19, 2018 9:37 pm
Well I already have the shifter in the adaptor board for your ram expansion.
oh yep :lol:
by exxos
Fri Oct 19, 2018 9:30 pm
Forum: STF REMAKE PROJECT
Topic: Video driver thoughts
Replies: 20
Views: 196

Re: Video driver thoughts

Forgottenmyname wrote:
Fri Oct 19, 2018 9:26 pm
At last, an opportunity for a triple decker. Now do I put it over or under the ram board :D
Don't follow what you mean ?
by exxos
Fri Oct 19, 2018 9:24 pm
Forum: STF REMAKE PROJECT
Topic: Video driver thoughts
Replies: 20
Views: 196

Re: Video driver thoughts

rpineau wrote:
Fri Oct 19, 2018 9:21 pm
the unused input (R,G,B) should be grounded or you'll get weird interferences in the colors :)
yep, just doing that now, putting jumper on input for a brightness control.. see what effect it has :)
by exxos
Fri Oct 19, 2018 9:16 pm
Forum: STF REMAKE PROJECT
Topic: Video driver thoughts
Replies: 20
Views: 196

Re: Video driver thoughts

Icky wrote:
Fri Oct 19, 2018 9:14 pm
Piggy back board time again :D
Gotta keep you all busy ;)
by exxos
Fri Oct 19, 2018 9:11 pm
Forum: STF REMAKE PROJECT
Topic: Video driver thoughts
Replies: 20
Views: 196

Re: Video driver thoughts

exxos has been at the lib editor again (everyone should be afraid and run and hide) Basically idea is a shifter break out board. This board plugs into the shifter socket, then the shifter plugs into this board. The RGB outputs from the shifter (digital) Go to the video DAC. The output of the DAC wil...