MV-LED

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MV-LED2. Picture courtesy of [MVS-Scans].

Credits display board in original MVS systems. Uses two 7-segment displays to show the player's remaining credits.

Uses CRE401 RC arrays for inputs.

Connections:

  • VCC
  • VCC
  • Clk
  • Digit 1 ABCD
  • Digit 2 ABCD
  • GND
  • GND

Digits are BCD-coded and controled by registers REG_LEDLATCHES($380031) and REG_LEDDATA($380041). Clock on rising edge ?

See also MV-ELA for the marquee board details.

MV-LED2 board incomplete schematic.

Connection to the MVS board visible in [page 5 of the schematics]