A hardware test tool present on several XX-in-1 pirate multicarts.
Hidden Test#
Soft Resetting makes the ROM boot into another test hidden within.
(Source: unicom)
It is called "STK test"; STK stands for Syntek.
Revisional Differences#
The original runs on CHR-RAM; the first revision has mostly different data and was made to run on CHR-ROM instead.
There is another revision built on top of the original CHR-RAM version, while still having a redundant bank using CHR-ROM; this version was built into some famiclone handhelds.
(Source: unicom)
Examples of the handhelds include the RetroGame (serial code GC26) and the 638-in-1 model of the Family Pocket (serial code RS-20).