I'll keep the updates for this in here.

Project parts planned so far:

Main part:
R6502 4MHz,128KB RAM, Simple I/O (Gamepad input only?)

Graphics:
64KB RAM
320x240 VGA, 4bit color palette (might bump it to 8bit, but will see, depends on how complex the schematic will become)

Audio:
Not yet decided


Todo list:
Deciding RAM allocation

Progress:
Reducing timing diagram for VGA V/H sync signals done:
- V_VISIBLE = B C D E + A || V_BLANK = A' B' + A' C' + A' D' + A' E' || V_RESET = A' + G' + H' + J'
- H_VISIBLE = A C + A B || H_BLANK = A' + B' C' || H_RESET = A' + B' + E'
(Link to truth table here and program used to reduce it here