Apple II manual FORMD2 LDX, Brcomp LDA, Compbr LDX

Page 204

3849

FD38 F0 0B

BEQ

FORMDS

 

3850

FD3A 88

DEY

 

 

3851

FD3B B8

CLV

 

 

3852

FD3C 50 F2

BVC STSHLP

;REPEAT TILL THRU

3853

FD3E

 

 

 

3854

FD3E A9 01

ONEBYT LDA #01

;SET BYTES = 1

3855

FD40 8D 2F A4

STA

BYTESM

 

3856

FD43 D0 E7

BNE

STASH

 

3857

FD45

 

 

 

3858

FD45

;FORMAT FOR SYSTEM 65 DISPLAY (REFORMAT FOR AIM)

3859

FD45 20 44 EB

FORMDS JSR

CLR

 

3860

FD48 20 DD E5

JSR

CGPC1

;ADDR TO SAVPC FOR DISASSEMBLY

3861

FD4B 20 42 E8

JSR

TTYTST

;IF TTY DO NOT GO TO DISASS

3862

FD4E D0 08

BNE

FORMD1

 

3863

FD50 20 3B E8

JSR

BLANK2

;IT IS TTY

3864

FD53 20 3B E8

JSR

BLANK2

 

3865

FD56 D0 11

BNE

FORMD2

;OUTPUT OPCODE

3866

FD58 20 6C F4

FORMD1 JSR

DISASM

 

3867

FD5B 20 24 EA

JSR

CRCK

;<CR> IF PRI PTR DIFF FROM 0

3868

FD5E AD 37 A4

LDA

CODFLG

;SEE IF HE WANTS CODE ALSO

3869

FD61 F0 1A

BEQ

FORM1

 

3870

FD63 20 3E E8

JSR

BLANK

 

3871

FD66 20 3C F5

JSR PRPC

;PROG CNTR

3872

FD69

;OUTPUT OPCODE

 

3873

FD69 AE 2F A4

FORMD2 LDX

BYTESM

 

3874

FD6C A0 00

LDY

#00

 

3875

FD6E A9 1C

DISPLY LDA

#ADDR

;DO LDA (ADDR),Y ,WHITOUT PAG 0

3876

FD70 20 58 EB

JSR

LDAY

 

3877

FD73 20 46 EA

JSR

NUMA

 

3878

FD76 20 3E E8

JSR

BLANK

 

3879

FD79 C8

INY

 

 

3880

FD7A CA

DEX

 

 

3881

FD7B D0 F1

BNE

DISPLY

 

3882

FD7D

 

 

 

3883

FD7D

;POINT TO NEXT INSTRUCTION LOCATION

3884

FD7D AC 2F A4

FORM1 LDY BYTESM

;ADD BYTESM TO ADDR

3885

FD80 20 CD E2

JSR

NXTADD

 

3886

FD83 4C 24 FF

JMP PATC16

;UPDATE PC

3887

FD86

 

 

 

3888

FD86

;RELATIVE BRANCH ADDRESS COMPUTATION

3889

FD86 AD 31 A4

BRCOMP LDA

TEMPX

 

3890

FD89 C9 02

CMP

#02

;IF REL BRANCH INPUT, USE IT

3891

FD8B D0 11

BNE

COMPBR

 

3892

FD8D A2 00

LDX

#00

 

3893

FD8F A0 01

LDY

#01

 

3894

FD91 20 12 FD

JSR

CONVRT

 

3895

FD94 B0 40

BCS

ERRJMP

 

3896

FD96 A9 02

LDA

#02

 

3897

FD98 8D 2F A4

STA

BYTESM

;SET PROPER BYTES

3898

FD9B 4C 2C FD

JMP

STASH

 

3899

FD9E A2 00

COMPBR LDX

#00

 

3900

FDA0 A0 02

LDY

#02

 

3901

FDA2 20 12 FD

JSR

CONVRT

 

3902

FDA5 B0 2F

BCS

ERRJMP

 

3903

FDA7 AD 1D A4

LDA

ADDR+1

;ADD BRANCH OFFSET

3904

FDAA 8D 27 01

STA

MOVAD+1

 

3905

FDAD AD 1C A4

LDA

ADDR

 

3906

FDB0 18

CLC

 

 

3907

FDB1 69 02

ADC

#02

 

3908

FDB3 8D 26 01

STA

MOVAD

 

3909

FDB6 90 03

BCC

CMPBR1

 

3910

FDB8 EE 27 01

INC

MOVAD+1

 

 

 

 

 

 

Page 203 Page 205
Image 204
Page 203 Page 205
Contents Apple II Original ROM Information Data Qjjj0005A0 FDA9A920 EDFDA98D 4CEDFDA9 8D4CEDFD Page Page Page JI@ Page 001AA0 F3FFE8E1 E8E8EFEB FFFFE0FF Ffefeeef 001AC0 FFFFE1E1 EFEEE7E8 EEE7F3FB FBEEE1EF001AE0 E8EEE7E8 Efefeeef Eeefeeee Efeeeeee 001DB0 9CDD9CDE DD9EC3DD Cfcacdcb 00479AAD 001FB0 Ffffffff FFFF2071 E14CBFEF 2003EEA9 Page DDBAF9F0 0DBDBAF9 FA60FFFF02E61FBD JJJ 60FFFFFF .JJAEAEA8AD Page Page Return Page System Monitor Copyright LOC0LOC1 BaslMask INY NO, INC Index X-COORD LDY PCH PRMN1 LDA FMT1 DFB Format Above EOR STA A3H FAE2 A2 FB Tabv STA Vtabs to ROW in A-REG STA Bash BCC Clreol Clear to END of Line NXTA4 INC A4L Incr 2-BYTE A4 STA BASL,Y Replace Flashing Screen Fdad A5 3C LT2 LDA A2L,X Copy A2 2 Bytes to Ioprt LDA A2L SET RAM IN/OUT Vectors BCC RD3 Loop Until Done STA A3H,X DFB LIST-1 FFF3 CC Save BRTBL,XLSR Prepare Carry for BC, BNC Stat LDA R0L JSR STAT2 Push LOW PC Byte VIA R12 LDA IN,Y CMPBNE Nomove JSRMloop DCRBNZ Mloop RTNINR BNCBNZ BM1Example Load IndirectStore Indirect Load DOUBLE-BYTE IndirectStore DOUBLE-BYTE Indirect POP IndirectStore POP Indirect ACC SubtractPOP DOUBLE-BYTE Indirect Compare BF A0 SET $A0BFLOOP1 SUB BNC LOOP1Return to 6502 Mode DecrementLOOP2 BNZ LOOP2Branch if no Carry Branch if Carry SETBranch if Plus LOOP3 SUBBranch if Minus ONE Branch if not Minus ONEBreak Return from Sweet 16 SubroutineLDA #ADRH STA IND+1 LDA OPTBL,XSTA IND JMP Page Page Sweet 16 Introduction Page Source DSP Print Dbload Sweet REM Ctrl DInput Enter String a $ , a $ NVAPoke 776 , a REM Poke Destination Print Print GotoCall -605 Return REM XAM8 in Monitor SweetMINI-ASSEMBLER BaumMneml MnemrSBC PCL Form ADDR-PC-2 JSR Cout Position FORM7 STX A1H Save Index ORG CLCSTA BNENorm LDA EXP1 ZERO? Shift Dividend Left Floating Point Package Floating Point Representation LOWStored High LOW EXP MantissaFloating Point Representation Examples Number Exponent MantissaFloating Point Subroutine Descriptions Page Page Page Page STY Init MANT1 LDY STYCalling Sequence HIGH-ORDERPage Page Page Page Page Page Seeeeeee MmmmmmmmFsub ORG SET Base page Adresses STA X2,X Common LOG of MANT/EXP1 Result in MANT/EXP1 Ovflw BRK Overflow 1EBB STA X2,X Load EXP/MANT2 with Z 1EBD DEX 1EBE BPL LF3 YES,RETURN with MANT1 Normalized Right Shift MANT1 or Swap with MANT2 on CarryCMP AddendNormx BCC Norm If EXEN, Normalize PRODUCT, Else Complement Errata for Rankins Floating Point Routines LDX Load X for High Byte of ExponentLDA STA LOG FaddFsub FmulPage Mantissa MOD 9/76 Load X for Later M2MHL Contin 1EAD LFA LDA Z,X L2E DCM RTLOG1 MdendNormx Object Code Dump Page Tapdel HsbdryToutfl LstcomOutvec Urcvec=UBRKVC =UIRQVCTAX ADCORA Stocom STABPL HASHUS+2 Restore Except A,F BEQ STXCPX JMPExwrap RTS Chksad PHPOutxah PHA TXANibasc and #$0F Nibble in a to Ascii in a BCS INST1 RTI Ldbyte JSR Inbyte Verify MEM E1PARM JMP STD2 MORED2 LDY JSR Brtt INC Ercnt UP to FF MEM3EX CLC SBC P3L BNE Exitgk Ksconf LDA Txtmov LDA BNE INRT2 Outone Dftxfr LDX Newdev LDALDA Toutfl 8BFF 0D Msfirst Bufadh DdrdigLOADT2 STA Mode BNE Lcerr Last Char not Kgettr LDA H8DFF BCC PACKT3 Dumpt DUMPT1 TXADMPT1A LDA DUMPT4 LDYOutbth LDX Register Name Patch Outcht STXHS Tape Boundary Rockwell International UdrahUddra NowlnOldlen LengthMovad TMASK1 =MOVADCurpos ChecksumTabuff TABUF2Write Edge Detect Control not Used Because KB CRB EQSDB TO,EQS CFD2A0A0A0A0SEI Disable Interrupt RS6 JSR Crlow Clear Display E1AC Have Valid Command Nxtadd TYA Space CommFor LOAD1A LDALOADK5 LDX JMP LOADK5 Next E46A EE INC Bkflg SET FLG Outcks LDA OUTCK1 PHADumpta LDX DUMPT1 LDAE5EA TOGTA1 LDA TOGTA2 LDA BCC JD3 MSG Whereo LDY ANY Other CPYSTA Outflg Output PHA Outall PHAROL Priflg Restore FLG Wrax JSR Numa EAA3 CA DEX Memerr JSR STA STIY+2 Dehalf LDA EC5E 4A LSR Only ROW Onekey LDA Debkey LDXED3B GET a Char from Tape Subroutine Edba LSR Cpiy Make Room for MSB Outtty PHA OUTD1A CPX OUTD2A TXAOUTDD1 PHA LDA First Chip Select Prndot LDA LDA #PRTIME/256 Start T2 for 1.7 Msec BIT Imask See if DOT is SET NEW Print ROW Newcol LDACkbuff LDA Bkcksm LDAOUTTA1 PHA OUTTA2 LDXF2E1 3E7E7F3E7F7FCOL0 Zero Leftmost ColumnDB BGYU76HN Rtmode Getfmt TAXMNNDX1 LSR MNNDX2 LSRPRADR2 LDA PLAPRADR4 DEX BPL PCADJ4 AIM Text Editor LDA END+1 CMP with END AF E7 JMP KEP RUB COMMAND-FIND String JMP CHN1 See if WE RAN Past END of Buffer Limit BEQ REP2 SBC Oldlen GOGO1 RTS ROM Table FB46 8A9AAABACADAStartm JSR Rdaddr LDY Tryjmp LDA IMMED1 LDXOPCMP1 LDA Brnchc JMPConvrt LDA FORMD2 LDX Brcomp LDACompbr LDX Backwd LDA Forwrd LDAMATCH1 JMP Curead TXAPATCH4 LDX CURPO2 Dont do Anything if 8D PATC15 JSR Crlf Decode Command Addblk ADDS1ABkcksm BrcompCRA Goerr Namo E8CF NAMO1 RD2 EA5D RD1 AIM 65 Microcomputer Monitor Program Listing E6ACTable of Contents AIM 65 Microcomputer Basic Language Reference ManualIntroduction Installing Basic in the AIM ROM Installation Procedure Entering BasicMemory SIZE? WIDTH?Exiting Basic Reentering BasicBasic Cursor Printer ControlGetting Started with Basic Basic Command SET ASCCHR$ Direct and Indirect Commands Direct Commands Indirect CommandsOperating on Programs and Lines Listing a ProgramDeleting a Line Replacing a LineDeleting a Program List Printing DataPrint ONE Half Equals 1/2 Number FormatNumber Output Format Variables Assigning Variables with AN Input Statement Input RVariable Names PSTG$ Print A, A*2 LET Z=7 Print Z, Z-AReserved Words Program Using Relations RemarksRelational Tests Input BLooping Square Root ProgramAN Improved Square Root Program Print NsqrnAnother Square Root Program Print Nsqrn Next NCOUNT-BACKWARD Program Some Other Looping OperationsPrint What is the Number Print I,J Next Next JMatrix Operations Sort ProgramPrint BAD GUESS, TRY Again Restore Input NPrint Must be Integer Stopping a ProgramStrings $=ROCKWELL R6500 Print A$ Rockwell R6500LEN Function Print LENA$,LENMICROCOMPUTERRIGHT$ Function MID$ FunctionPrint B$ Basic for Rockwell R6500 Print C$ Basic FOR-ROCKWELL-R6500 VAL and Strs FunctionsCHR$ Function Data AIM 65,DOGAdditional String Considerations Name Example PURPOSE/USE DIMInput Input X$ Print Print X$Operators Symbol Sample Statement ESCCntl Print Print X/1.3Symbol Sample Statement PURPOSE/USE NegationRelational Operators Not If not Q3 then Operator Argument Result NotCommands Print Intruder AlertAlert Statement SYNTAX/FUNCTION Example ClearStatement SYNTAX/FUNCTION FRE Statement SYNTAX/FUNCTION ListStatement SYNTAX/FUNCTION Load Statement SYNTAX/FUNCTION NEWStatement SYNTAX/FUNCTION Example RUN Statement SYNTAX/FUNCTION Example SaveProgram Statements Statement SYNTAX/FUNCTION Example DEFStatement SYNTAX/FUNCTION DIM Statement SYNTAX/FUNCTION ENDStatement SYNTAX/FUNCTION For Statement SYNTAX/FUNCTION Gosub Statement SYNTAX/FUNCTION GotoStatement SYNTAX/FUNCTION IF...GOTO Statement SYNTAX/FUNCTION IF...THENIf X0 then Print ERROR, X Negative Goto Example Statement SYNTAX/FUNCTION LETStatement SYNTAX/FUNCTION Next Statement SYNTAX/FUNCTION ON...GOSUBStatement SYNTAX/FUNCTION Restore Symbol SYNTAX/FUNCTION WaitExample Restore Return Statement SYNTAX/FUNCTION ReturnStatement SYNTAX/FUNCTION Input Statement SYNTAX/FUNCTION POSStatement SYNTAX/FUNCTION Print Print Value ISAStatement SYNTAX/FUNCTION Read Statement SYNTAX/FUNCTION SPCStatement SYNTAX/FUNCTION TAB String Functions Statement SYNTAX/FUNCTION ASCStatement SYNTAX/FUNCTION LEFT$ Statement SYNTAX/FUNCTION LENStatement SYNTAX/FUNCTION MID$ Statement SYNTAX/FUNCTION RIGHT$Arithmetic Functions Statement SYNTAX/FUNCTION ABS Statement SYNTAX/FUNCTION ATNStatement SYNTAX/FUNCTION COS Statement SYNTAX/FUNCTION EXPStatement SYNTAX/FUNCTION Example SGN Print SgnxStatement SYNTAX/FUNCTION Example SIN Print SinxError Messages ?XX ErrorInverse Hyperbolic Secant TAB, SPC Space HintsPRINTX,Y,Z Storage Allocation Information Speed HintsThis is Probably the Most Important Speed Hint Converting Basic Programs not Written for AIM 65 BasicOLD AIM OLDAssembly Language Subroutines Ascii Character Codes DecimalNUL SOHAddress Content $AEInputnumbern PrintxRecording on Cassette Using the Basic Save Command RUN NUMBER?Storing AIM 65 Basic Programs on Cassette Cassette Operations Using the AIM 65 Editor OUT=T F=OUT=T F=FNAME T= IN=ATN Implementation Entered by Alter Memory MOF9C 0FACWIDTH? Bytes Free AIM 65 Basic Saving ATN Object Code on Cassette
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Manual 19 pages 1.54 Kb

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.
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