Organization

Apple BASIC

Apple I - BASIC manual 2 Apple I - BASIC manual 1

Apple 1 basic was on cassette tape and took about 30 seconds to load.

Some of the following was in the BASIC:

  • variables, numeric simple variable, A,N, A1, T6

Operations Manual

Apple I - Operations Manual cover Apple I - New Operations Manual cover

The manual consists of about 12 pages plus the warranty page.

The Apple 1 computer is a complete microprocessor system, consisting of a 6502 microprocessor and support hardware, integral video display, dynamic memory and refresh hardware and fully regulated power supplies. It has a resident system monitor software, enabling the user to display, write, examine, debug and run programs.

Teletype Pinouts

[code]
APPLE COMPUTER

TIM APPLE I
6530-004 6502
33 D0 33
32 | 32
31 | 31
30 | 30

Teletype connection schematic

Apple I - teletype schematic

Connecting a Teletype

Computer Data Systems, Inc.

TIM BYTES THE APPLE:

For those of you that would like to have hard copy capability

and much better control over program development on the Apple 1,

SWTP PR-40 Printer Interface Schematics

Apple I - printer interface schematic

The above was the most commonly used schematic for connecting a printer. It allowed the user to switch between two outputs: to the video monitor, and to both the video monitor and the printer.

SWTPC PR-40 Printer

Apple I - printer

Steve Jobs wrote an article about interfacing an Apple 1 to the SWTPC PR-40 printer in the October 1976 issue of Interface Age. Joe read the article, purchased and built the printer kit, and interfaced it to his Apple 1.

GT-6144 Advertisement

Apple I - GT-6144 Advert

GT-6144 Subroutine

SUBROUTINE TO SET UP GRAPHICS PIA AND CLEAR SCREEN

[code]
TO ENTER:
IN MACHINE LANGUAGE- JSR $0300
(20 00 03)

IN BASIC - CALL 768

0300- 48 PHA

SWTP GT-6144 Interface Schematic

This information is taken from the schematic for the hook up of the Apple1 to the SWTP GT-6144 graphics board, refer to it while reading this, especially on the PIA pins , 23, 34, 35, 37 and 38.

The chip on the left is for the PIA for the graphic board. All pins marked with a * are connected to the corresponding pin on the keyboard PIA, pins 1, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36. This is listed at the bottom of the sheet on the left side. Pin 22 goes to the address line A3.

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