Royal Mahjong is a mahjong game so old that it predates Nichibutsu's discovery of the nude woman.
Development Text#
Starting at 0x0DD7 in the main CPU is text from Technical Design Labs' Z80 linker:
TDL LINKER (CP/M) 3/28/78
Diagnostic Error 99.
Command aborted
123456
.MAIN.
123456789012
MAP(Source: Original TCRF research)