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.


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