MV-LED

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).

See also MV-ELA for the marquee board details.

File:Mv-led2 schem.jpg

MV-LED2 board incomplete schematic.

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