Wednesday, 7 March 2018

Thunder Force AC - Tecnosoft 1990 - Bootleg

サンダーフォースAC - Thunder Force AC

PCB Images

This particular bootleg ran slow.  Looking at the PCB it was evident where the problem was. A 48MHz oscillator had been used in place of the standard 53.69MHz one.

Unfortunately 53.69MHz clocks are pretty scarse nowadays so a cheap 54MHz  clock from eBay was used instead.

The board now runs at a much better speed. ^_^

Pics/info of an original board can be found here.