Jump to content
Trash80toHP_Mini

Driving the M5120 Display

Recommended Posts

There is no context so what is the point of this thread? Not sure what the mission here is. Replacing the LCD display? Or driving the existing one from something else? 

 

 

Share this post


Link to post
Share on other sites

Patience, my good man. I ran out of time at lunch so I couldn't elaborate. Obviously, or not from the title, I'm looking to drive the Portable's LCD from something besides the Portable Logic Board  .  .  .  that's been done! :lol:

 

I've been assembling these research materials for a few days. I'll look this information over for a bit at work, but haven't had much free time for such things since the epidemic.

At home I'll be working out a schematic for the display controller itself as best I can. For that I'll need help translating my visual/graphical schematic development into a PCB design schematic.

Panel's controller board appears to be all off the shelf logic and just two layers with all  components opposite the LCD.

I only need to go deeply enough into the controller board so I can see where what goes from the cable.

 

I'm thinking the first step will be developing an interface board driven by Pi or other SBC that'll use the LCD as its display.

Was bouncing this off @bigmessowires and he got me thinking about grabbing the image straight off the video buffer section of a VidCard.

We've got the fully documented, right down to the GAL formulas Micron Xceed SE306-48.

_____chop 80 lines off its output, giving 640x400 resolution.

_____tweak the timings to match what the Portable's LCD likes to display.

 

PROJECT:

Develop a "Video Card" shield/whatever that will eventually be meshed with the frame buffer of the 306-48 with an SBC using it as a display in that or like manner as that first step.

Adapt the 306-48 baseline design to output Portable res & timings.

Whatever layer may need to be developed between the SBC VidCard shield and the bodged 306-48.

 

Getting a capable SBC running the M5120 LCD from somewhere within the Portable's case, interfaced with the Portable's Peripherals will be satisfying enough for a bit, but just a bit. [:)]

Share this post


Link to post
Share on other sites

I, for one, would someday like to try and tackle getting something running off the Portable's external video port (when I learn more about electronics). Otherwise, I'm with TechKnight...I don't get it...

Share this post


Link to post
Share on other sites
On 7/31/2020 at 1:22 PM, techknight said:

Well im not sure where you are going with this. Are you trying to achieve grayscale?

Very long term target: Portable Res in B&W on Apple's Panel from a custom SE/30 logic board designed to fit the Portable Subframe Assembly's mounts.

 

On 7/31/2020 at 2:09 PM, LaPorta said:

I, for one, would someday like to try and tackle getting something running off the Portable's external video port (when I learn more about electronics). Otherwise, I'm with TechKnight...I don't get it...

That is in the spec already, so long as you don't mind having lots of pixels in 24bit. Sorry that to do so, it'll require you to do a Portable SE30 board upgrade. :))

 

Edited by Trash80toHP_Mini
apparently I can no longer type or spell.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×