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…
I have been able to hack the built-in video driver of my PowerMac 8500 to support 1920x1080 and 1680x1050 LCD panels perfectly (been using 1920x1080 for over a month now with zero …
68kMLAHardwareby noidentityTue, 3 Nov 2009 - 11:17
The machine (240 V Classic - not II) has not been switched on for about 4 years and appears dead. I have opened up and can see the voltage on the inside of the mains switch but I …
68kMLAHardwareby cranerobinsonTue, 3 Nov 2009 - 10:25
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…
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…
I am working on a project with my Plus. The analog board is dead and while I do plan to fix it, I want to play around with a microcontroller. Anyway, One thing I'll need the microc…
Well, the thing went BANG, and my house RCD tripped (at least it tested that...), a nice smell of burning electrics coming from the power supply followed...
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68kMLAHardwareby CharliemanMon, 2 Nov 2009 - 19:43
Depends what condition it's in when it arrives. This will be my third CC. I would like to keep one stock, or stock-ish (ie a LC550/CCII motherboard swap, at most), and reserve th…
Too much paste is worse then none at all, even a little that gets stuck on the cache leads will short out a chip.
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yea if your using lead paste, ive never see…
Well, the thing went BANG, and my house RCD tripped (at least it tested that...), a nice smell of burning electrics coming from the power supply followed...
This thing is toast, b…
68kMLAHardwareby billynomatesMon, 2 Nov 2009 - 16:40
Report back on how your XPostFacto install of 10.2 goes! I've been really interested in getting a Kanga to turn into an OS X machine, but haven't known anything about how easy it w…
Hey, that's awesome of you to cut your friend a deal with the eMac! Have them max out the RAM and install Leopard and they've got a great machine on their hands there... same goes …
Sometimes I wonder if it would be plausible to operate a business that did just this and readying similar computers for use by children. I think that my 8-33mhz Macs, which aren't…