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TOPIC -- Apple II -- Red Book Monitor listing

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APPLE II

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SYSTEM MONITOR

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COPYRIGHT

1977 BY

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APPLE COMPUTER, INC.

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ALL RIGHTS RESERVED

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S. WOZNIAK

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A. BAUM

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; TITLE "APPLE II SYSTEM MONITOR"

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LOC0

 

EQU

$00

 

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LOC1

 

EQU

$01

 

18

WNDLFT

EQU

$20

 

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WNDWDTH EQU

$21

 

20

WNDTOP

EQU

$22

 

21

WNDBTM

EQU

$23

 

22

CH

 

EQU

$24

 

23

CV

 

EQU

$25

 

24

GBASL

EQU

$26

 

25

GBASH

EQU

$27

 

26

BASL

 

EQU

$28

 

27

BASH

 

EQU

$29

 

28

BAS2L

EQU

$2A

 

29

BAS2H

EQU

$2B

 

30

H2

 

EQU

$2C

 

31

LMNEM

EQU

$2C

 

32

RTNL

 

EQU

$2C

 

33

V2

 

EQU

$2D

 

34

RMNEM

EQU

$2D

 

35

RTNH

 

EQU

$2D

 

36

MASK

 

EQU

$2E

 

37

CHKSUM

EQU

$2E

 

38

FORMAT

EQU

$2E

 

39

LASTIN

EQU

$2F

 

40

LENGTH

EQU

$2F

 

41

SIGN

 

EQU

$2F

 

42

COLOR

EQU

$30

 

43

MODE

 

EQU

$31

 

44

INVFLG

EQU

$32

 

45

PROMPT

EQU

$33

 

46

YSAV

 

EQU

$34

 

47

YSAV1

EQU

$35

 

48

CSWL

 

EQU

$36

 

49

CSWH

 

EQU

$37

 

50

KSWL

 

EQU

$38

 

51

KSWH

 

EQU

$39

 

52

PCL

 

EQU

$3A

 

53

PCH

 

EQU

$3B

 

54

XQT

 

EQU

$3C

 

55

A1L

 

EQU

$3C

 

56

A1H

 

EQU

$3D

 

 

 

 

 

 

 

Page 19
Image 19
Apple II manual System Monitor Copyright, LOC0, LOC1, Basl, Bash, Lmnem, Rmnem, Invflg, Ysav

II specifications

The Apple II, launched in April 1977, was one of the first highly successful mass-produced microcomputer products. It marked a significant leap in personal computing, setting standards for future developments in the industry. Created by Steve Wozniak and Steve Jobs, the Apple II differentiated itself with its user-friendly design, appealing aesthetics, and robust capabilities.

One of the standout features of the Apple II was its open architecture, which allowed users to expand and enhance the computer's functionality. This design enabled hundreds of third-party hardware and software developers to contribute to its ecosystem, resulting in an array of peripherals, including printers, modems, and storage devices. The Apple II utilized a MOS Technology 6502 microprocessor running at a clock speed of 1 MHz. Initially equipped with 4 KB of RAM, the machine could be expanded to 48 KB, accommodating more complex applications and programs.

The Apple II was also notable for its colorful graphics. It was one of the first computers to support color display, offering a 6-color palette with a resolution of 280x192 pixels in 16 colors when using its Color Graphics Card. This feature significantly enhanced the visual appeal of games and educational software developed for the platform, making computing more accessible and entertaining for various audiences.

Apple's commitment to user experience was evident in the design of the machine. It featured an integrated keyboard and a plastic case, which was both durable and visually appealing. The self-contained design included drive bays for floppy disk drives, allowing for quicker data access than traditional tape drives. It also supported audio output, enabling sound effects and music, a novelty at the time.

The introduction of the Apple DOS operating system further underscored the machine's capabilities. DOS streamlined file management and made it easier for users to navigate and manage their data. The combination of hardware and software positioned the Apple II as an educational tool and a gaming platform, fostering a vibrant software ecosystem.

The Apple II family continued to evolve, with variations like the Apple II+, IIe, and IIgs being introduced over the years. These iterations brought enhancements in memory, processing power, and graphics capabilities. The legacy of the Apple II endures, not only as a foundational product in personal computing but also as a symbol of innovation that paved the way for future advancements in technology. Its impact is still felt today, as it inspired countless developers and shaped the trajectory of the computer industry.