Specifications:

Resolution........................................ 512 x 342

Horizontal scan rate.......................... 22.3KHZ, (4µs on, 40µs off)

Vertical scan rate ............................. 60HZ (180µs on, 16.4ms off)

Taking another look at that, I am starting to wonder if a B&W TV monitor could work. 60Hz is the NTSC vertical scan rate.

I'm starting to think the best thing for me to do is look into building a custom TTL adapter and D/A converter to get it up to a VGA standard

Click to expand...

Well, it wouldn't have to be a D/A converter per se. As you're only doing 1-bit colour, you'll only need the one voltage level and zero. I suppose you could call it a 1-bit D/A

I had this other thought: if you double the horizontal and vertical resolution, you get 1024x684 (1024x768 with a few scan lines thrown away). Ok, so I'm not quite sure where I'm going with this ... I'll just jot down what comes to me ...

Random thoughts

• 768 - 684 = 84 (42 lines top and bottom)
  
• What's the blanking interval on the classic CRT?
  
• 60HZ is a common refresh rate for LCD monitors
  
• A 512 bit buffer that stores each horizontal scan line and dumps it out to the monitor at the required scan rate, repeating it if doubled
  
• Buffer the entire screen and draw it one frame later at whatever scan rates and resolutions you like
  
• Tap the VRAM directly
  
• -edits to come-