Apple Composite Monitor Manual do Utilizador descarregar pdf (Página 4)

Display:

The Apple Computer outputs a composite

video signal (composite of sync and video infor-

mation) which can be applied to any standard

raster-scan type video display monitor. The out-

put level

is

adjustable with the potentiometer

located near the video output Molex connector, J2.

The additional two outside pins on the Molex con-

nector supply

$5

andi-12 volts, to be used in future

Apple accessories. The composite video signal

can also be modulated at the proper RFfrequency,

with an inexpensive commercially available device

,

and applied to the antenna terminals of a home

television receiver. Since the character format

is 40 characters /line, all television receivers

will have the necessary bandwidth to display the

entire 40 characters. Two large manufacturers

of video display monitors,

which connect directly

with the Apple Computer, are Motorola and Ball.

The mating four-pin Molex connector is provided.

AC Power Sources:

Two incoming AC power sources are re-

quired for operation: 8 to

10 VAC (RMS) at 3 amps,

and 28VAC (RMS) Center-Tapped

-

at

1

amp. These

AC supplies enter the system at the Molex con-

nector,

Jl.

The

8

to10 volts AC provides the raw

AC for the

+5

volt supply, while the 28 VCT sup-

plies the raw AC for the +12 and -12 volt supplies,

and the -5V supply

is

derived from the

-1

2V reg-

ulated output.

I

The board, as supplied, requires no more

than 1.5 amps DC from the t5V supply, while the

regulator

is

capable of supplying 3 amps. The

remaining 1.5 amps DC from the t5V supply is

available for user hardware expansion (provided

ratings are employed).

rce of the raw AC voltages

,

are two commercially available trans-

,

Stancor P/N P-8380 or equivalent (8 to

at

3

amps), and Stancor PIN P-8667 or

equivalent

(

28VCT at

1

amp

)

.

Simply wire

the

secondaries to the mating six-pin Molex connector

supplied, and wire the primaries in parallel,

as

-

shown in the schematic diagram (power supd

section, Dwg. No. 00101, sheet

3

of

3.

TEST PROGRAM

&

After attaching the keyboard, display, and

AC power sources, you can try a simple program

to test if your system and the attachments are

functioning together properly. While it does not

test many possible areas of the microprocessor

system, the test program will test for the correct

attachment of the keyboard, display, and power

supplies.

FIRST:

Hit the RESET button to enter the system

monitor. A backslash should be displayed,

and the cursor should drop to the next line.

SECOND:

4Y

Type-

0

:

A9 b

0

b

AA

b

20

b EF

b

FF

b

E8 b 8A

b

4C b'2 bib-(RE~)

(0

is a zero, NOT an alpha "0"; b means

blank or space; and (RET) hit the "return"

key on the keyboard)

THIRD:

Type-

0

.

A (RET)

(This should print out, on the display,

program you have just entered.

)

FOURTH:

Type-

R

(RET)

(R

means run the program.

)

THE PROGRAM SHOULD THEN PRINT

OUT ON THE DISPLAY A CONTINUOUS STREAM

OF

ASCII

CHARACTERS. TO STOP THE PRO-

GRAM AND RETURN TO THE SYSTEM MONITOR,

HIT THE "RESET" BUTTON. TO RUN AGAIN,

TYPE

:

R (RET).

1 2 3 4 5 6 7 8 9 10 11 12

Comentários a estes Manuais

Sem comentários