zx81ula-vhdl

my ZX81 ULA replacement - vhdl for xc9500xl (9572xl-64)

• Project Navigator Output (v14.7 - lin64 image running with VirtualBox)

• Prototype Photos

• Schematic (badly named schematic_xc9536... but really needs a xc9572)

• xc3sprog tp program the CPLD, from a RPI

  • https://anastas.io/hardware/2020/09/29/xc9500-cpld-raspberry-pi-xc3sprog.html
  • See also the 'remoteprog' script

• Quite useful : Wavedrom.com

  • https://wavedrom.com
  •