Table of Contents
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Table of Contents
VGA6448, A Text-based Monochrome VGA display
Introduction
VGA6448 is initially discussed on 6502.org forum here: It is a simple design suitable as a piggy-back board for system RAM to add VGA capability.
Features
EPM7064S or ATF1504AS CPLD
4K dual port RAM
25.175MHz clock
Theory of Operation
Design Files
Schematic
CPLD design
Software
Matrix screen saver. The program starts at $a000