Super Prologue 21 bios dumped by Cyo The Vile

[Mr^Burns]

 

[Mr^Burns]

IC_OS_KARAOKE_V1_7_JPN_SUM_BD1B_1994-12-20_27C800DIP42_BANK1.BIN

and

IC_OS_KARAOKE_V1_7_JPN_SUM_BD1B_1994-12-20_27C800DIP42_BANK0.BIN

 

[rorirub]

This BIOS matches the boot rom on the later model, the SKC-1000C. On there it is labeled as MPR-17450A.
Which also implies the existence of an undumped revision, MPR-17450 (sans A).

 

[rorirub]

A HDD dump would be much more interesting, since those things break down all the time.