As noted, why not just tap the frequency straight off the motherboard? It's right there. But whatever works for you.
(And also, just have to ask... the specs for the propeller say…
I think the "16MHz" quoted for the Plus is probably nominal (ie near enough) and is actually 15.6672MHz
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Oscillators with a 7.8336 frequency and its multiples…
I think the "16MHz" quoted for the Plus is probably nominal (ie near enough) and is actually 15.6672MHz.Have you considered taking your clock straight from the Mac's onboard oscill…
Interesting project MarkS. By coincidence, I've been reading the following similar projects in the last 24hrs:
Prop-6502 laptop
pPropQL020 and pPropQL
I think the "16MHz" quote…
Zoomed Video is for video *in*put - it's a direct pipe into the GPU, bypassing the rest of the computer, and allowing video to be displayed on the LCD. The Road Rocket is a second…
as far as i know, leopard will only boot (at least from the dvd) w/ 512mb of ram. i got my emac for noting b/c the people before me were trying to make it boot a leopard dvd w/ onl…
Back in 2006 when the 128MB DIMM I had in my iMac died, I booted it once or twice with the original factory 32MB of RAM. It took somewhere around 15 minutes for Jaguar to boot, and…
The Apple II uses a 14.31818MHz crystal (4x color burst) which gives it the ability to generate pseudo-color video on a TV.
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And so did the original IBM PC, i…
Everything in a Plus runs off a single crystal which was chosen for compatibility with the SCC chip and standard baud rates. If you change the crystal, the Mac may beep and start, …
15.6+- khz is the time it takes to produce a single line on a NTSC tv, so the apple screen is probably really running at or near ntsc tv specs
Also it was very common in the 80's t…
Haven't played with it yet.
No space on the bench to set it up.
Leopard. Now there's a thought. I have a pre-loved 10.5 DVD, but I don't think the machine has the RAM.
It'd be …
68kMLAPowerPCby Dennis NedryTue, 3 Nov 2009 - 04:37
I can tell you that it very seldom works on a Wallstreet....
Resetting the battery can be done in Open Firmware, I gather, on a Pismo. Mind you, it hasn't worked for my Pismo's de…
68kMLATroubleshootingby beachycoveTue, 3 Nov 2009 - 04:21
Nice, I have always wanted one of the brighter colors. I got my 2 from my school, Blueberry and Graphite. Clamshell's are the coolest design ever.
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If I wasn'…
68kMLASoftwareby oneboyarmyMon, 2 Nov 2009 - 23:12
What was the reason behind the odd clock speed?
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It divides evenly (ie by integer) to generate baud rates. But I imagine the pixel clock was an important reas…
15.6+- khz is the time it takes to produce a single line on a NTSC tv, so the apple screen is probably really running at or near ntsc tv specs
Also it was very common in the 80's …
Everything derives from the same clock. The frequency from the oscillator is divided in half for the processor and further for other IC's. The full clock speed is fed to the video …
If I were to swap out the oscillator, would it potentially damage the Mac? I doubt the .1664 MHz jump would hurt anything, but I want to make sure first.
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Ser…