Breeder

Breeder
Developer: Soft Pro Publisher: Soft Pro Platform: Famicom Disk System Released in JP: December 15, 1986 This game has hidden development-related text.

FMC Data Monitor Leftovers

For some reason this game contains leftover text from a thing called FMC Data Monitor inside the OPNPRG_ file, on Side A.

These leftovers can be found inside a FDS dump at offsets 0x0466A-0x047CA:

FMC DATA MONITOR
LOAD COMPLETED
PLEASE SET DISK CARD
CHECK AND LOAD NOW
FMC DATA MONITOR  VER 3]2
DISK CARD INFORMATION
MAKER CODE]   SIDE]]]]]]]]
GAME NAME]]   VOLUME]]]]]]
RESERVE]]]]]
COLD START]]
GAME VER]]]   DEBUG VER]]]
BLOCK FILE]]]]
CRC SUM]]]]]
TOTAL BYTE]
ERROR NUMBER]]
                     DISK CARD INFORMATION

Non-printable characters have been removed for better readability.

The actual software is part of the FMC Disk Card Checker program and displays information about the Famicom Disk System game that was checked. The version number reported matches with the actual known dump of the FMC Disk Card Checker disk, but the actual data not, neither from the disk nor from RAM, so the actual source of this leftover text is unknown.

Offsets 0x05E12-0x05E25 also contain a lonely PLEASE SET DISK CARD text, alongside a lonely number 20 at offsets 0x07C90-0x07C91.

Something similar can be found inside Knight Move, another Famicom Disk System game.

(Discovery: WaluigiBSOD)