Caple C871i Manual de usuario descargar pdf (Pagina 522)

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101

Apple II Computer Info

To get above 9Mhz usually requires a new CPU chip.

These cost about $20 from a company called

Western Design Center which is in Mesa Arizona.

The chip is the 65C816S8PL-14, rated at 14Mhz (

but the design has gone much faster than this due

to the fact that WDC only tests them to 14Mhz).

The CPU is located near the center of the card in

a socket and has the numbers 65C816 printed on

it (there may be other numbers and letters too, but

65C816 is on there).

For the >9Mhz mod, simply replace the CPU with

the 14Mhz part and then plug in a faster oscillator

4x the Mhz you want to clock the CPU.

Ok, I found my old DigiKey catalog. Here are the

DigiKey part numbers:

CTS Clock Oscillators, Half Size

40Mhz CTX175-ND $3.25

50Mhz CTX176-ND $3.25

64Mhz CTX177-ND $4.45

You can order them at the DigiKey web site at this

URL: http://www.digikey.com/

An oscillator of a particular Mhz will clock the TWGS

CPU at 1/4 of the oscillator Mhz, so the 50Mhz

oscillator will make the CPU go at 12.5Mhz, for

example.

If price is not an issue, I suggest getting one of each

and experimenting to see what speed the TWGS

tops off at.

If not, I suggest getting the 50Mhz and 40Mhz units.

12.5Mhz TWGS (50Mhz oscillator) almost always

works, but with a 40Mhz unit, you can fall back on

10Mhz operation if necessary.

The 64Mhz oscillator (16Mhz operation) is a bit more

iffy, since cache RAM speeds come into play. Grab

this oscillator too if you want to experiment, but it

may or may not work.

Good luck!

>>I recommend internal Focus drive from

>>http://www.allelec.com/ Alltech Electronics for the

>I checked, and some additional questions arise, if I may.

>Add AppleWorks 3.0 or AppleWorks GS V1.1 (Disks only) for $10.00

>I'm unfamiliar (other than believing they're like Claris or MS Works)

>with these two applications. Is there a substantive difference between

Apple II Computer Technical Information : Apple II Family Hardware Info

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Caple C871i Manual de usuario Pagina 522

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Caple C871i Manual de usuario Pagina 522

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