Monza GP

A very rare boardset

24 April 2014
Theoretically this is a MONACO¬†GP bootleg, but looking at the board you can see it has been redesigned with a CPU. Looking at the schematics most of the logic parts are the same of Monza GP but Olympia could save a lot of ICs osing a CPU. Display board is different too. Sega version is intelligent. Top scores are managed directly on the board; on the contrary Olympia board is “stupid”, just a matrix to show top scores and time/ranking; in this case it’s more similar to TURBO display board. This is the boardset. Audio board is the same than Monza GP. you can see part of the CPU board, part of the EPROM board and the sound board.

monzagp_pcb01

This is the component side of the display board

monzagp_pcb02

This is the EPROM board

monzagp_pcb03

EPROM board is full of factory hacks

monzagp_pcb04 monzagp_pcb05 monzagp_pcb06 monzagp_pcb07 monzagp_pcb08 monzagp_pcb09

Inside

24 April 2014
Tis is the cabinet. I used a modern monitor manufactured in Italy for videopokers. A little transformer is used for lamps behind the marquee. In this case I used led lamps to preserve the marquee from the heat.

monzagpinside01 monzagpinside02 monzagpinside03 monzagpinside04

The cab

24 April 2014
This is the cabinet monzagp01 monzagp02 monzagp03 monzagp03-1 monzagp04 monzagp04-1 monzagp05 monzagp06 monzagp07 monzagp08 monzagp09

PCB troublshooting videos

24 April 2014

This is what I saw when I plugged the board for the first time

After some works on the CPU board I could see something more

Replacing some RAMs I could see to have repaired the board…

And here is my first game

I had to replace some memories only to remove some garbage from the screen during the race.