FFA0: 95 41

1077

 

STA

A3H,X

 

 

FFA2: E8

1078

NXTBS2

INX

 

 

 

FFA3: F0 F3

1079

 

BEQ

NXTBAS

 

 

FFA5: D0 06

1080

 

BNE

NXTCHR

 

 

FFA7: A2 00

1081

GETNUM

LDX

#$00

;CLEAR A2

FFA9: 86 3E

1082

 

STX

A2L

 

 

FFAB: 86 3F

1083

 

STX

A2H

 

 

FFAD: B9 00 02

1084

NXTCHR

LDA

IN,Y

;GET CHAR

FFB0: C8

1085

 

INY

 

 

 

FFB1: 49 B0

1086

 

EOR

#$B0

 

 

FFB3: C9 0A

1087

 

CMP

#$0A

 

 

FFB5: 90 D3

1088

 

BCC

DIG

;IF HEX DIG, THEN

FFB7: 69 88

1089

 

ADC

#$88

 

 

FFB9: C9 FA

1090

 

CMP

#$FA

 

 

FFBB: B0 CD

1091

 

BCS

DIG

 

 

FFBD: 60

1092

 

RTS

 

 

 

FFBE: A9 FE

1093

TOSUB

LDA

#GO/256

;PUSH HIGH-ORDER

FFC0: 48

1094

 

PHA

 

;

SUBR ADR ON STK

FFC1: B9 E3 FF

1095

 

LDA

SUBTBL,Y

;PUSH LOW-ORDER

FFC4: 48

1096

 

PHA

 

;

SUBR ADR ON STK

FFC5: A5 31

1097

 

LDA

MODE

 

 

FFC7: A0 00

1098

ZMODE

LDY

#$00

;CLR MODE, OLD MODE

FFC9: 84 31

1099

 

STY

MODE

;

TO A-REG

FFCB: 60

1100

 

RTS

 

; GO TO SUBR VIA RTS

FFCC: BC

1101

CHRTBL

DFB

$BC

;F("CTRL-C")

FFCD: B2

1102

 

DFB

$B2

;F("CTRL-Y")

FFCE: BE

1103

 

DFB

$BE

;F("CTRL-E")

FFCF: ED

1104

 

DFB

$ED

;F("T")

FFD0: EF

1105

 

DFB

$EF

;F("V")

FFD1: C4

1106

 

DFB

$C4

;F("CTRL-K")

FFD2: EC

1107

 

DFB

$EC

;F("S")

FFD3: A9

1108

 

DFB

$A9

;F("CTRL-P")

FFD4: BB

1109

 

DFB

$BB

;F("CTRL-B")

FFD5: A6

1110

 

DFB

$A6

;F("-")

FFD6: A4

1111

 

DFB

$A4

;F("+")

FFD7: 06

1112

 

DFB

$06

;F("M") (F=EX-OR $B0+$89)

FFD8: 95

1113

 

DFB

$95

;F("<")

FFD9: 07

1114

 

DFB

$07

;F("N")

FFDA: 02

1115

 

DFB

$02

;F("I")

FFDB: 05

1116

 

DFB

$05

;F("L")

FFDC: F0

1117

 

DFB

$F0

;F("W")

FFDD: 00

1118

 

DFB

$00

;F("G")

FFDE: EB

1119

 

DFB

$EB

;F("R")

FFDF: 93

1120

 

DFB

$93

;F(":")

FFE0: A7

1121

 

DFB

$A7

;F(".")

FFE1: C6

1122

 

DFB

$C6

;F("CR")

FFE2: 99

1123

 

DFB

$99

;F(BLANK)

FFE3: B2

1124

SUBTBL

DFB

BASCONT-1

 

 

FFE4: C9

1125

 

DFB

USR-1

 

 

FFE5: BE

1126

 

DFB

REGZ-1

 

 

FFE6: C1

1127

 

DFB

TRACE-1

 

 

FFE7: 35

1128

 

DFB

VFY-1

 

 

FFE8: 8C

1129

 

DFB

INPRT-1

 

 

FFE9: C3

1130

 

DFB

STEPZ-1

 

 

FFEA: 96

1131

 

DFB

OUTPRT-1

 

 

FFEB: AF

1132

 

DFB

XBASIC-1

 

 

FFEC: 17

1133

 

DFB

SETMODE-1

 

 

FFED: 17

1134

 

DFB

SETMODE-1

 

 

FFEE: 2B

1135

 

DFB

MOVE-1

 

 

FFEF: 1F

1136

 

DFB

LT-1

 

 

FFF0: 83

1137

 

DFB

SETNORM-1

 

 

FFF1: 7F

1138

 

DFB

SETINV-1

 

 

 

 

 

 

 

 

 

Page 37
Image 37
Apple II manual STA A3H,X

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.