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Super Prologue 21 bios dumped by Cyo The Vile
Mr^Burns - Oct 18, 2021
    Mr^Burns Oct 18, 2021 




   Mr^Burns Oct 18, 2021 
IC_OS_KARAOKE_V1_7_J
PN_SUM_BD1B_1994-12-
20_27C800DIP42_BANK1
.BIN

and

IC_OS_KARAOKE_V1_7_
JPN_SUM_BD1B_1994-12
-20_27C800DIP42_BANK
0.BIN

    rorirub Oct 26, 2021 
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 Oct 26, 2021 
A HDD dump would be much more interesting, since those things break down all the time.