MV-LED: Difference between revisions

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[[File:mv-led2.jpg|thumb|MV-LED2 board, same components, different size. Picture courtesy of [[http://www.mvs-scans.com MVS-Scans]].]]
[[File:mv-led2.jpg|thumb|MV-LED2 board, same components, different size. Picture courtesy of [[http://www.mvs-scans.com MVS-Scans]].]]


Credits display board in original [[MVS systems]]. Uses two 7-segment displays to show the player's remaining [[credits]].
LED-based credits display board in original [[MVS hardware|MVS cabs]]. Uses two 7-segment displays to show the player's remaining [[credits]].


Uses [[CRE401]] RC arrays for inputs.
Uses [[CRE401]] arrays for inputs.


Pinout:
Pinout, from left to right (pins 1 to 13):
*VCC
*5V
*VCC
*5V
*Clk
*Clock
*Digit 1 ABCD
*Digit 1 ABCD
*Digit 2 ABCD
*Digit 2 ABCD
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*GND
*GND


Digits are BCD-coded and controled by registers {{Reg|REG_LEDLATCHES}} and {{Reg|REG_LEDDATA}}. Clock on rising edge ?
Digits are BCD-coded and controlled by registers {{Reg|REG_LEDLATCHES}} and {{Reg|REG_LEDDATA}}.
 
[[File:74ls47 digits.png|center]]


See also [[MV-ELA]] for the marquee board details.
See also [[MV-ELA]] for the marquee board details.

Revision as of 02:07, 3 March 2016

MV-LED board. Picture courtesy of [TheArcadeBoneyard].
MV-LED2 board, same components, different size. Picture courtesy of [MVS-Scans].

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

Uses CRE401 arrays for inputs.

Pinout, from left to right (pins 1 to 13):

  • 5V
  • 5V
  • Clock
  • Digit 1 ABCD
  • Digit 2 ABCD
  • GND
  • GND

Digits are BCD-coded and controlled by registers REG_LEDLATCHES and REG_LEDDATA.

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]