209 lines
4.6 KiB
ArmAsm
Executable File
209 lines
4.6 KiB
ArmAsm
Executable File
******************************************************************************************
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*
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* Address Field Scanner
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* ========================================================================================
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* This is a simple Disk II scanner
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* to identify address field contents
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*
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* 1/16/2016: Version 1.0
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*
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* 1/29/2016: Version 2.0
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* - Restructuring to support paging and scrolling.
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* - Split source into multiple files as one file finally got way too big.
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* - Slowly switching from spaces to tabs as an experiment in code formatting.
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* - Pages available:
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* + About (default page)
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* + Headers (updated Address Field Header information)
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* + Browse track buffer (hilights Address Field Header bytes)
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* + Graphical disk display
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* + Buffer counts
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*
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******************************************************************************************
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TYP SYS
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XC ; enable 65C02
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use macros
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* Program Locations
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OriginAddress = $2000
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ProgramAddress = $6000
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ProgramLength = ProgramEnd-ProgramAddress
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* Constants:
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NUMBYTES = 29 ; Number of bytes on screen
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OFFSETV = 3 ; Offset to volume
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OFFSETT = OFFSETV+2 ; Offset to track
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OFFSETS = OFFSETT+2 ; Offset to sector
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OFFSETC = OFFSETS+2 ; Offset to checksum
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FAILBYTS = 6656 ; Number of bytes before failure
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* 80 column card / print controls:
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_PRBYTE = 1 ; print byte @ addr
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_CLS = $8C ; clear screen
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_INVERSE = $8F
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_NORMAL = $8E
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_MT_OFF = $98 ; disable MouseText
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_HOME = $99 ; home the cursor, not cls
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_MT_ON = $9B ; enable MouseText for uppercase inverse characters
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_CLREOL = $9D ; clear to EOL
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_C_APPLE = "@" ; Closed Apple
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_O_APPLE = "A" ; Open Apple
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_L_ARROW = "H" ; Left Arrow
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_R_ARROW = "U" ; Right Arrow
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_U_ARROW = "K" ; Up Arrow
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_D_ARROW = "J" ; Down Arrow
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_H_LINE = "S" ; Horizontal Line (full width)
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* Variable locations:
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DUM $0 ; ZP locs
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SAMPLES DFB 0 ; number of sector samples
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CURTRK DFB 0 ; current track
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DSTTRK DFB 0 ; destination track
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PTR DA 0 ; primary print pointer
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PTR2 DA 0 ; secondary print pointer
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SLOT16 DFB 0 ; slot# * 16
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COUNTER DA 0 ; fail counter
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TEMP DFB 0 ; local variable
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TEMPY DFB 0 ; local Y coordinate
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DATA DA 0 ; data buffer
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_init da 0 ; current page init
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_display da 0 ; current page line display handler
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_keypress da 0 ; current page keypress handler
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noscroll dfb 0 ; flag for scrolling (in high bit)
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topline dw 0 ; current line at top of page
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maxlines dw 0 ; maximum number of lines available
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printline dw 0 ; line being printed
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DEND
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inbuf = $200 ; reusable buffer
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DATASTART = $4000
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DATAEND = $6000
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DATALEN = DATAEND-DATASTART
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PAGELEN = 20 ; number of lines displayed in content window
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* High ASCII constants
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CTRLH = "H"-$40
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LARROW = CTRLH
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CTRLU = "U"-$40
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RARROW = CTRLU
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ESC = $9B
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CTRLK = "K"-$40
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UpArrow = CTRLK
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CTRLJ = "J"-$40
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DownArrow = CTRLJ
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* ProDOS:
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PRODOSMLI = $BF00
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_MLIQUIT = $65
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* ROM routines and associated addresses:
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TEXT = $FB2F
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HGR = $F3E2
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HPOSN = $F411
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HBAS = $26
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DELAY = $FCA8
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GETCH = $FD0C
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PRCR = $FD8E
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PRHEX = $FDDA
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COUT = $FDED
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MONITOR = $FF69
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USRADR = $3F8
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* I/O addresses:
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KEYBOARD = $C000
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KEYCLEAR = $C010
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OpenApple = $C061
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* Relocate application above HGR and HGR2 page
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org OriginAddress
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lda #>OriginEnd
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sta PTR+1
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lda #<OriginEnd
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sta PTR
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lda #>ProgramAddress
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sta PTR2+1
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stz PTR2
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ldy #0
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ldx #>ProgramLength+255 ; account for non-zero low byte
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:0 lda (PTR),y
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sta (PTR2),y
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iny
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bne :0
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inc PTR+1
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inc PTR2+1
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dex
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bne :0
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jmp ProgramAddress
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OriginEnd ; Marker for code relocation
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* Display screen
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org ProgramAddress
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MAIN lda #$4C ; JMP
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sta USRADR
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lda #<ProgramAddress
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sta USRADR+1
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lda #>ProgramAddress
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sta USRADR+2
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JSR $C300 ; Assuming 80 columns
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JSR PRINT
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DFB _CLS
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ASC "AFScanner",$8D
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DFB _MT_ON,_INVERSE,80,_H_LINE,_NORMAL,_MT_OFF ; wraps!
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DFB 20,$8D
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DFB _MT_ON,_INVERSE,80,_H_LINE,_NORMAL,_MT_OFF ; wraps!
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ASC _MT_ON,_INVERSE,_L_ARROW,_NORMAL,", ",_INVERSE,_R_ARROW,_NORMAL,_MT_OFF," Track / "
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ASC "re",_INVERSE,"S",_NORMAL,"can / "
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ASC _INVERSE,"R",_NORMAL,"ecalibrate / "
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ASC "goto ",_INVERSE,"T",_NORMAL,"rack / "
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ASC _INVERSE,"ESC",_NORMAL," quit"
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DFB _HOME
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HEX 8D8D
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HEX 00
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* Setup local variables
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Initialize
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ldx #$60 ; assumption = slot 6
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stx SLOT16
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lda #40
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sta CURTRK ; force a recalibration
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stz DSTTRK
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lda #"A" ; default screen is "About" page
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jsr SetScreen
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; Falls through to SetupPage in page.s
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put page
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put page-about
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put page-field
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put page-browse
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put page-graphics
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put page-count
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put page-test
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put diskii
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put util
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ProgramEnd
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