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Proto:Super Game Boy

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This page details one or more prototype versions of Super Game Boy.

How about a nice leek in this trying time?
This page or section details content from the September 2020 Nintendo Leak.
Check the September 2020 Nintendo Leak category for more pages also sourced from this material.

Present in the Game Boy lotcheck leak were a number of Super Game Boy ROMs.

Hmmm...
To do:
Add more differences, such as datamining SYSSGB-X.2 and the SGBLOGs.

Super Game Boy 1

Filename SHA256 Date (JST) Description
SYSSGB-X.2 c3ebb20964bf68d5e4f7dae9f5ec2556436e5f5d975c6e90da6479736f50ca5d 1994-03-06 05:04:48 Unidentified. Seems similar in-game, but the ROM seems to have many differences. Picture of PCB.
SYSSGB-0.1 99e21a25876463981cc7a7453cfcda189813c2a1cf814f79254f3391d3773183 1994-03-23 05:48:16 Identical to "Super Game Boy (Japan, USA) (Rev 1) (Beta) (1994-03-23)" only with checksums entered into header.
SYSSGB-0.2P 5e2eba3795f70dafe6be3bec0f65193e175821f7d7740ffe6d34d9d5a6204ca0 1994-03-24 01:13:18 Only 4 bytes different from SYSGB-0.2N: three in the ROM header, and one at 0x02AB. Seems to be the PAL version.
SYSSGB-0.2N bba9c269273bedb9b38bd5eb23bfaa6e509b8decc7cb80bb5513905af04f4ceb 1994-03-24 01:20:22 Hash matches "Super Game Boy (Japan, USA)".
SYSSGBNT 1994-03-25 02:10:52
SYSSGB-1 c6c4daab5c899b69900c460787de6089edabe94b760f96d9f583d30cc0a5bb30 1994-04-04 03:53:10 Hash matches "Super Game Boy (Japan, USA) (Rev 1)".
SYSSGB-2 a75160f7b89b1f0e20fd2f6441bb86285c7378db5035ef6885485eaff6059376 1994-05-09 02:57:32 Hash matches "Super Game Boy (World) (Rev 2)".

SGB Logger

Both of these are stuck at a blue screen on boot, which may suggest that they require a devkit or other external hardware in order to run properly.

Filename SHA256 Date (JST) Description
SGBLOG-0.1 207685a416bb838ad4c74de089ab6d2191bcd3e073874b0330ab485ebc04af38 1994-09-13 02:47:24
SGBLOG-1.0 a271c51d74adfea6610154324ff63b2ee439119f02942dc32e56c2b03fa97fa6 1994-09-13 04:03:38 Named "SGB LOGGER" in ROM header.

Super Game Boy 2

Filename SHA256 Date (JST) Description
SYSSGB2-10 c172498a23d1176672931bab33b629c7d28f914a43dca9e540b8af1b37ccf2c6 1997-10-13 08:56:00 Hash matches "Super Game Boy 2 (Japan)".