4 ms·
When we were doing the Apple Newton, one of my cow-orkers noted that the CPU had a divisor register that let you choose pretty much any clock frequency you coul
by kabdib 9y ago
When we were doing the Apple Newton, one of my cow-orkers noted that the CPU had a divisor register that let you choose pretty much any clock frequency you could want, down to kilohertz.
His half-serious proposal to guarantee users "a 12 hour battery life" regardless of battery condition was poorly received by the rest of the team . . .
- gm-conspiracy 9y agoUnder Siege 2?
- nerfhammer 9y agoIs that different from what a prescaler is?
- kabdib 9y agoIt was a "CPU throttle" register that controlled the ARM's clock, with four or eight bits of divisor from the base 20Mhz clock. It's been a long time and it's hard to remember h/w register layouts from several decades ago :-) (Yes, we did the whole Newton on a 20Mhz ARM with less than 512K of RAM).