GCC Technologies FI/30 internal HD for Mac SE

[Kai Robinson]

OK, so i've been to sleep, woken up and these are the Apple Checksum's for the ROM's:

SE (800k): B2E362A8
SE (FDHD): B306E171

Wierdly, they share the same Major version, sub version and sub-release number - only the checksum differs.

The Apple checksum is calculated by taking the low 32 bits of the sum of every unsigned 16 bit word in the rom, except for the first 4 bytes.

 

[retr01]

OK, so i've been to sleep, woken up and these are the Apple Checksum's for the ROM's:

SE (800k): B2E362A8
SE (FDHD): B306E171

Wierdly, they share the same Major version, sub version and sub-release number - only the checksum differs.

The Apple checksum is calculated by taking the low 32 bits of the sum of every unsigned 16 bit word in the rom, except for the first 4 bytes.

Thank you, @Kai Robinson. I hope you feel refreshed.

So, how is the correct checksum identified? I realize the checksumis not labeled on the ROM chips. Reprogram? My apologies; I am lost.

 

[Volvo242GT]

My SE SuperDrive had this 40MB Quantum HD installed in it on this red anodized aluminum "sled" that mounted ontop of the upper floppy drive and just barely fit under the CRT (both floppies were still installed):

View attachment 6679

I have the same thing in my SE SuperDrive as well. Bought it from Herb Johnson.