Apple CS II Guía de usuario descargar pdf (Pagina 261)

and 3) the video cable exhibits lower capacitance between the center lead and

the shield.

You can connect your Apple II to a Monochrome or Color composite video

monitor.

______________________________

From: Michael Pender and Rubywand

018- What is the usual way to connect an Apple II to a

display?

For a IIgs, you connect to the IIgs RGB monitor. For other Apple II's, you

use a video quality 'RCA cable' to connect to a composite color monitor, such as

one of the Apple II monitors or a third party monitor like the Amdek Color-1.

(The IIgs has a composite color output which can go to a composite monitor; but,

for IIgs super-res, the results are unsatisfactory.)

An alternative to a composite monitor is to connect to a color TV directly

or through a VCR. Most VCRs and many modern televisions have a composite video

input port. Rather than buying a new monitor, a person can usually use an RCA

cable to connect the Apple to a spare VCR or television. The stabilization

logic built into even a cheap VCR can go a long way toward cleaning up an ugly

picture.

______________________________

From: Rubywand

019- Does anybody know how to do the "Color Killer Mod"

on a //e?

It looks like you should be able to do a full-screen color-killer on a IIe

by using a general purpose NPN transistor (2N3904, 2N2222, etc.) to shunt the

Color Burst signal. The transistor's collector would connect to the junction of

R15 and R13; the emitter lead would go to Ground. The transistor should be

connected directly to the R15-R13 junction and ground.

The base lead would go through a 2k-3k Ohm resistor to an annunciator

output, such as An-3 at pin 12 on the 16-pin J-15 Game connector. PEEKing the

appropriate addresses should flip Color OFF and ON.

The reason for qualifiers such as "looks like", etc. is that I have not

actually tried a mod like this on a IIe. Monitors are remarkably sensitive to

Color Burst. If the transistor does not do a good job of shunting the signal,

enough may get through to trigger Color-ON.

A more positve (but less easy) technique is to use a 74LS32 OR gate to

control flow of the 3.58MHz signal. The IC could be tack-soldered onto U88 via

its +5 and GND pins. U88 is the 74S02 which has the gate which produces Color

Burst.

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Apple CS II Guía de usuario Pagina 261