Here is the text from the LC III's Developer Note:
"Omega is a custom programmable phase locked loop clock generator that provides the primary clocks required by the Macintosh LC III. Omega produces a hardware-selectable system clock for the microprocessor bus, a programmable dot clock for the video circuits, and a fixed 31.3344 MHz clock used for the serial ports, sound circuits, floppy disk, and various timers".
Yes, well, my reason for posting the video with the "hack" was to highlight that the crystal frequency <> the CPU clock frequency... It looks like everyone is on that page now - but the question remains... what *is* that crystal frequency?... Perhaps @Bolle is correct? Anyone know to help out @max1zzz?it's already documented in this article
Doesn't that give 4 'possibilities'? I suppose 25Mhz and 33Mhz are two of them... I wonder what the other two combos produce?the speed is controlled by a single pair of resistors
Given the config resistors are just 0 ohm links I would advise against installing both at the same timeDoesn't that give 4 'possibilities'?
But are they tied to different input pin? Thus giving a "0" or "1" option for each input? I'm away, so no access to schematics... just thinking "logically"...I would advise against installing both at the same time
So how does that work? Does one go to 5V and the other to GND - so that there are three states? "Open", "GND" or "5V"?they're both attached to the same pin
So how does that work? Does one go to 5V and the other to GND - so that there are three states? "Open", "GND" or "5V"?
It certainly possible and is actually a very interesting idea, a mini-itx board would be really cool, defiantly something to consider for the future!It would be need if you reformulated the board into an ATX for factor offshoot.