68kMLA Classic Interface

This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.

Click here to select a new forum.

Lisa to Mac Plus conversion

Posted by: Trash80toHP_Mini on 2017-05-24 12:21:41 Great bump! I just hought of another series of pictures. If you're not comfortable with snipping the cable ties to clear the view of the solder side traces or removing the IC to show the traces under that, how about backlighting the board from both sides from different angles and doing same with pics to better expose reverse side trace from both sides. This is a great art project for reconstructing the PCB in Illustrator. Doing it migh help in developing a schematic of your board.

Posted by: Trash80toHP_Mini on 2017-05-24 12:34:17 Fun time, no mysterious PALs involved! 74LS74 pinout: I'm wondering if this might be a missing link in the development of a generic Analog or TTL output conversion for Compact Mac Video that could be tweaked into a VGA output?

Posted by: Themk on 2017-05-24 14:04:03 I still am kicking myself for not buying the X-RAY film viewer backlight at my local thrift shop for $5 a couple weeks ago. It would have been PERFECT for back lighting PCBs.

Posted by: mactjaap on 2017-05-25 02:17:27 OK! Will do my best to make new pictures. Because of my two left hands in soldering I will not remove anything. I will try to make pictures with more light in de background so it will shine true more. Woudl be great if we could develop something which can be used if you have a Lisa with not "guts", but a monitor inside! I will PM Canby Fat Mac to see if he is onboard with this projects or that he is busy with other things.

Posted by: Trash80toHP_Mini on 2017-05-25 19:56:40 Thanks, that would be great. I like puzzling these things out, even if it doesn't lead anywhere. Anything that might lead to driving a  VGA display from a Compact Mac is worth exploring.

Posted by: mactjaap on 2017-05-27 04:40:23 Some new pictures. taken against a bright sky. Hope they are better for for needs.

Posted by: mactjaap on 2017-05-27 05:01:11 2 more for the chip 74LS74

Posted by: mactjaap on 2017-05-27 07:41:03 andsomemore...... Is the pinout correct like this? Cluse up IC behind the wires:

< 2