6500 ROM Secret

[applefreak]

Apple Sounds

Apple Start-Up, Crash, and Easter Egg Sound Collection

http://froods.ca/~dschaub/sound.html

Programs Used (NOTE: Classic 68K apps):

ROMmie - A program I did not use, but am asked for often.

Save ROM - The program I used for accessing ROMs.

Brian's Sound Tool - Use to access binary files to find sounds.

 

[MultiFinder]

If the TAM and 6500 have nearly the same ROM, then does my 6500 have pr0n sounds hiding in it? :lol:

 

[Dennis Nedry]

The ROMs are not "nearly" the same. They are identical. Whatever one has the other must have then! lol

 

[Dennis Nedry]

I have looked through the 6500/TAM ROM and never found the porno sound effect. I can safely say it is not stored in raw format like all the other sounds. It could possibly still be in there, though, in some sort of compressed format.

 

[slomacuser]

Did you try to find Quadra 700 other startup sound?

Does anybody have that control panel that changes the Quadra startup sound? I can not find it anymore ...

 

[Dennis Nedry]

I ripped the ROM of my Quadra 700, but I never got around to picking it apart. I'll have to remember to look around in there.

If anyone remembers what control panel this is, I think there are a few of us here who would like to see it!

 

[trag]

OK, so I'm thinking about where gestalt ID could be coming from. Apparently it's not in the ROM since the ROM is identical yet the IDs are different. The ROM must set the gestalt ID based on what hardware it finds on the logic board. So somewhere outside the ROM, on the logic board, there is an actual electronic difference between the TAM and 6500 logic boards.

The gestalt is often varied a bit by hardware configuration. For example, the Q605 and LC475 have the same motherboard (and ROM) but a jumper changes the gestalt between one and the other.

I guess I always thought, assumed even, that the gestalt ID was stored directly in ROM, but this proves that it indeed is in RAM at least for this model. This would explain how a utility like Wish I Were could exist; all it has to do is modify this RAM location.

It could be a bit more difficult than that. The Gestalt may be a register in the memory controller which is accessed during POST by the code in the ROMs. In this case the Gestalt would not be stored in RAM, although the register in the memory controller (or other chip) might be addressable in a fashion similar to RAM.

What would be really cool is to be able to run a debugger and step through just until the gestalt ID is set, then modify it to be the TAM gestalt and see what happens if you resume operation. I bet you'd hear the TAM startup sound on a 6500.

It might be easier to run a debugger and step until the start-up sound is played. The note that address and back up a bit. Now look for a branch statement which compares with the two gestalt values you've identified. Substitute a Jump for that Branch, such that the code always plays the TAM sound. Of course, you'd have to modify the ROMs to do that, but it shouldn't be too hard to find Flash chips which will do the job...

 

[Quadraman]

What does the startup chime for a TAM sound like? anyone got a sound clip?

 

[Dog Cow]

What does the startup chime for a TAM sound like? anyone got a sound clip?

You need this: http://mactracker.ca/

 

[yuhong]

In fact, it is the same as the 5500. You distinguish between the 5500 and the TAM from software by using the 'bxid' Gestalt selector.