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Apple being able to migrate across CPU types is notable. They've done it how many times now? Just musing on that fact, and the impact it has on their thinking
by ddingus 6y ago
Apple being able to migrate across CPU types is notable.
They've done it how many times now?
Just musing on that fact, and the impact it has on their thinking.
- wsh 6y agoThree times (MC680x0 to PowerPC to x86), so far, or more if you also count the 24-bit to 32-bit and 32-bit to 64-bit transitions.
- ddingus 6y agoI didn't realize there was a 24 bit to 32 bit. Was that the 68K to PPC transition?
- Camillo 6y agohttps://lowendmac.com/2015/32-bit-addressing-on-older-macs/ https://lowendmac.com/2015/32-bit-addressing-on-older-macs/
- ddingus 6y agoThanks! Yeah, I passed this part of Mac history right by.
- mrlonglong 6y agoBad memories there. Programmers would stuff crap in the high 8 bits of the pointers. Not so good once running on 32 bits!
- ddingus 6y agoOuch! That seems both tempting, because the buts are right there, unused. ...and a bad idea, because at that time people had to know the address space was going to expand.