Table of Contents
VGA Expansion for 128KB RAM, 2-board stack (without PS2 interface)
Features
- Plug in existing 128KB RAM socket
- 25.175MHz pixel clock, 60Hz VGA
- 4K dual port RAM for video memory and font lookup tables
- 64-macrocell CPLD, EPM7064SLC44
- 64 columns, 48 rows of 8×8 pixel monochrome text
- Video RAM can be written any time
Design Files
Schematic for RAM board
Schematic for dual-port VGA board
Gerber photoplot for RAM board
Gerber photoplot for dual-port VGA board
