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; MSX BASIC and SYSTEM VARIABLES definitions
;
; December 2007
; $Id: msxbasic.def,v 1.8 2017/01/09 10:20:47 stefano Exp $
;


; System variables

defc VDP_RP  = $0006	; address of vdp READ port
defc VDP_WP  = $0007	; address of vdp WRITE port
defc MSX_VER = $002D    ; MSX version (0 = MSX1, 1 = MSX2)

; SUBROUTINES FOR READ/WRITE CALLS OF THE INTER-SLOT
defc RDPRIM = $F380	;5 Routine that reads from a primary slot 
defc WRPRIM = $F385	;7 Routine that writes to a primary slot 
defc CLPRIM = $F38C	;14 Routine that calls a routine in a primary slot 
defc USRTAB = $F39A	;2 Address to call with Basic USR0 
defc USR0 = $F39A	;2 Address to call with Basic USR0 
defc USR1 = $F39C	;2 Address to call with Basic USR1 
defc USR2 = $F39E	;2 Address to call with Basic USR2 
defc USR3 = $F3A0	;2 Address to call with Basic USR3 
defc USR4 = $F3A2	;2 Address to call with Basic USR4 
defc USR5 = $F3A4	;2 Address to call with Basic USR5 
defc USR6 = $F3A6	;2 Address to call with Basic USR6 
defc USR7 = $F3A8	;2 Address to call with Basic USR7 
defc USR8 = $F3AA	;2 Address to call with Basic USR8 
defc USR9 = $F3AC	;2 Address to call with Basic USR9 
defc LINL40 = $F3AE	;1 Width for SCREEN 0 (default 37) 
defc LINL32 = $F3AF	;1 Width for SCREEN 1 (default 29) 
defc LINLEN = $F3B0	;1 Width for the current text mode 
defc CRTCNT = $F3B1	;1 Number of lines on screen 
defc CLMLST = $F3B2	;1 Column space. It’s uncertain what this address actually stores 


; VIDEO VARIABLES DEPENDING ON MODE
defc TXTNAM = $F3B3	;2 BASE(0) - SCREEN 0 name table
defc TXTCOL = $F3B5	;2 BASE(1) - SCREEN 0 color table
defc TXTCGP = $F3B7	;2 BASE(2) - SCREEN 0 character pattern table
defc TXTATR = $F3B9	;2 BASE(3) - SCREEN 0 Sprite Attribute Table
defc TXTPAT = $F3BB	;2 BASE(4) - SCREEN 0 Sprite Pattern Table

defc T32NAM = $F3BD	;2 BASE(5) - SCREEN 1 name table
defc T32COL = $F3BF	;2 BASE(6) - SCREEN 1 color table
defc T32CGP = $F3C1	;2 BASE(7) - SCREEN 1 character pattern table
defc T32ATR = $F3C3	;2 BASE(8) - SCREEN 1 sprite attribute table
defc T32PAT = $F3C5	;2 BASE(9) - SCREEN 1 sprite pattern table

defc GRPNAM = $F3C7	;2 BASE(10) - SCREEN 2 name table
defc GRPCOL = $F3C9	;2 BASE(11) - SCREEN 2 color table
defc GRPCGP = $F3CB	;2 BASE(12) - SCREEN 2 character pattern table
defc GRPATR = $F3CD	;2 BASE(13) - SCREEN 2 sprite attribute table
defc GRPPAT = $F3CF	;2 BASE(14) - SCREEN 2 sprite pattern table

defc MLTNAM = $F3D1	;2 BASE(15) - SCREEN 3 name table
defc MLTCOL = $F3D3	;2 BASE(16) - SCREEN 3 color table
defc MLTCGP = $F3D5	;2 BASE(17) - SCREEN 3 character pattern table
defc MLTATR = $F3D7	;2 BASE(18) - SCREEN 3 sprite attribute table
defc MLTPAT = $F3D9	;2 BASE(19) - SCREEN 3 sprite pattern table

defc CLIKSW = $F3DB	;press click status
defc CSRY   = $F3DC	;1 Current row-position of the cursor
defc CSRX   = $F3DD	;1 Current column-position of the cursor
defc CNSDFG = $F3DE	;function keys status


; AREA TO SAVE VDP REGISTERS
defc RG0SAV = $F3DF	;1 Content of VDP(0) register (R#0) 
defc RG1SAV = $F3E0	;1 Content of VDP(1) register (R#1) 
defc RG2SAV = $F3E1	;1 Content of VDP(2) register (R#2) 
defc RG3SAV = $F3E2	;1 Content of VDP(3) register (R#3) 
defc RG4SAV = $F3E3	;1 Content of VDP(4) register (R#4) 
defc RG5SAV = $F3E4	;1 Content of VDP(5) register (R#5) 
defc RG6SAV = $F3E5	;1 Content of VDP(6) register (R#6) 
defc RG7SAV = $F3E6	;1 Content of VDP(7) register (R#7) 
defc STATFL = $F3E7	;1 Content of VDP(8) status register (S#0) 
defc TRGFLG = $F3E8	;1 Information about trigger buttons and space bar state 
defc FORCLR = $F3E9	;1 Foreground color 
defc BAKCLR = $F3EA	;1 Background color 
defc BDRCLR = $F3EB	;1 Border color 
defc MAXUPD = $F3EC	;3 Jump instruction used by Basic LINE command. The routines used are: RIGHTC, LEFTC, UPC and DOWNC 
defc MINUPD = $F3EF	;3 Jump instruction used by Basic LINE command. The routines used are: RIGHTC, LEFTC, UPC and DOWNC 
defc ATRBYT = $F3F2	;1 Attribute byte (for graphical routines it’s used to read the color) 

; WORK AREA FOR PLAY STATEMENT
defc QUEUES = $F3F3	;2 Address of the queue table 
defc FRCNEW = $F3F5	;1 CLOAD flag

; WORK AREA FOR KEY INPUT
defc SCNCNT = $F3F6	;1 Key scan timing
defc REPCNT = $F3F7	;1 This is the key repeat delay counter
defc PUTPNT = $F3F8	;2 Address in the keyboard buffer where a character will be written 
defc GETPNT = $F3FA	;2 Address in the keyboard buffer where the next character is read 
defc CS120 = $F3FC	;5 Cassette I/O parameters to use for 1200 baud 
defc CS240 = $F401	;5 Cassette I/O parameters to use for 2400 baud 
defc LOW = $F406	;2 Signal delay when writing a 0 to tape 
defc HIGH = $F408	;2 Signal delay when writing a 1 to tape 
defc HEADER = $F40A	;1 Delay of tape header (sync.) block 
defc ASPCT1 = $F40B	;2 Horizontal / Vertical aspect for CIRCLE command 
defc ASPCT2 = $F40D	;2 Horizontal / Vertical aspect for CIRCLE command 
defc ENDPRG = $F40F	;5 Pointer for the RESUME NEXT command 

; USED BY BASIC INTERNALLY
defc ERRFLG = $F414	;1 Basic Error code 
defc LPTPOS = $F415	;1 Position of the printer head
defc PRTFLG = $F416	;1 Printer output flag is read by OUTDO
defc NTMSXP = $F417	;1 Printer type is read by OUTDO. SCREEN ,,,n writes to this address
defc RAWPRT = $F418	;1 Raw printer output is read by OUTDO
defc VLZADR = $F419	;2 Address of data that is temporarilly replaced by ‘O’ when Basic function VAL("") is running 
defc VLZDAT = $F41B	;1 Original value that was in the address pointed to with VLZADR 
defc CURLIN = $F41C	;2 Line number the Basic interpreter is working on, in direct mode it will be filled with #FFFF
defc KBUF   = $F41F

defc BUFMIN = $F55D  ; used in INPUT st.
defc BUF    = $F55E  ; Buffer to store characters typed( in ASCII code)
defc ENDBUF = $F660  ; Prevent overflow of BUF
defc TTYPOS = $F661  ; Virtual cursor location internally retained by BASIC
defc DIMFLG = $F662  ; ARRAY FLAG
defc VALTYP = $F663  ; Type indicator
defc OPRTYP = $F664  ; Store operator number in the extended momentarily before operator application
defc DORES  = $F664  ; Indicates whether stored word can be crunched
defc DONUM  = $F665  ; Flag for crunch
defc CONTXT = $F666  ; Text address used by CNRGET
defc CONSAV = $F668  ; Store token of constant after calling CHRGET
defc CONTYP = $F669  ; Type of stored constant
defc CONLO  = $F66A  ; Value of stored constant
defc MEMSIZ = $F672  ; Highest location in memory used by BASIC
defc STKTOP = $F674  ; Top location to be used for the stack
defc TXTTAB = $F676  ; Starting address of BASIC text area
defc TEMPPT = $F678  ; Starting address of unused area of temporary descriptor
defc TEMPST = $F67A  ; Temporary descriptors
defc TMPSTR = $F697  ; Temporary string
defc DSCTMP = $F698  ; String descriptor which is the result of string fun.
defc FRETOP = $F69B  ; Starting address of unused area of string area
defc TEMP3  = $F69D  ; Used for garbage collection or by USR function
defc TEMP8  = $F69F  ; Used for garbage collection
defc ENDFOR = $F6A1  ; Next address of FOR st.
defc DATLIN = $F6A3  ; Line number of DATA st.read by READ st.
defc SUBFLG = $F6A5  ; Flag for array for USR fun.
defc USFLG  = $F6A6
defc FLGINP = $F6A6  ; Flag for INPUT or READ
defc TEMP   = $F6A7  ; Location for temporary reservation for st.code
defc PTRFLG = $F6A9  ; =0 if no line number converted to pointers
defc AUTFLG = $F6AA  ; AUTO mode flag
defc AUTLIN = $F6AB  ; Current line number for auto
defc AUTINC = $F6AD  ; Increment for auto
defc SAVTXT = $F6AF  ; Text pointer for resume
defc SAVSTK = $F6B1  ; Save stack when error occurs
defc ERRLIN = $F6B3  ; Line where last error
defc DOT    = $F6B5  ; Current line for edit & list
defc ERRTXT = $F6B7  ; Text pointer for use by RESUME
defc ONELIN = $F6B9  ; LINE to go when error
defc ONEFLG = $F6BB  ; =1 if executing an error trap routine
defc TEMP2  = $F6BC
defc OLDLIN = $F6BE  ; old line number set up ^C ...
defc OLDTXT = $F6C0  ; Points st. to be executed next
defc VARTAB = $F6C2  ; Pointer to start of variable space
defc ARYTAB = $F6C4  ; Pointer to begging of array table
defc STREND = $F6C6
defc DATPTR = $F6C8  ; DATA pointer
defc DEFTBL = $F6CA  ; Default valtype for each letter

; USER FUNCTION PARAMETERS
defc PRMSTK = $F6E4  ; Previous definition block on stack
defc PRMLEN = $F6E6  ; Number of bytes of objective table
defc PARM1  = $F6E8  ; Objective prameter definition table
defc PRMPRV = $F74C  ; Pointer to previous parameter block
defc PRMLN2 = $F74E  ; Size of parameter block
defc PARM2  = $F750  ; For parameter storage
defc PRMFLG = $F7B4  ; Flag to indicate whether PARM1 was searching
defc ARYTA2 = $F7B5  ; End point of search
defc NOFUNS = $F7B7  ; 0 if no function active
defc TEMP9  = $F7B8  ; Location of temporary storage for garbage collection
defc FUNACT = $F7BA  ; Count of active functions
defc SWPTMP = $F7BC  ; Value of first  variable in SWAP st.
defc TRCFLG = $F7C4  ; 0 MEANS NO TRACE

; MATH-PACK
defc FBUFFR = $F7C5  ; Buffer for fout
defc DECTMP = $F7F0  ; Used to transform decimal integer to floating point number
defc DECTM2 = $F7F2  ; Used at division routine execution
defc DECCNT = $F7F4  ; Used at division routine execution
;;defc DAC    = $F7F6  ; DECIMAL ACCUMULATOR
defc FACCU  = $F7F6  ; alias for DECIMAL ACCUMULATOR
defc FACLOW = $F7F8  ; DECIMAL ACCUMULATOR + 2
defc HOLD8  = $F806  ; (48 bytes) Double precision operations work area
defc HOLD2  = $F836  ; (8 bytes)
defc HOLD   = $F83E  ; (9 bytes)
defc ARG    = $F847  ; Area to set the value to be calculate with DAC
defc RNDX   = $F857  ; Last random number

; DATA AREA USED BY BASIC INTERPRETER
defc MAXFIL = $F85F  ; High legal file number
defc FILTAB = $F860  ; Starting address of of file data area
defc NULBUF = $F862  ; Points to file 0 buffer ( used in SAVE & LOAD st.)
defc PTRFIL = $F864  ; Points to file data of currently accessing file
defc RUNFLG = $F866  ; Non-zero for run after load
defc FILNAM = $F866  ; Name for FILES, NAME & others
defc FILNM2 = $F871  ; Second name for NAME
defc NLONLY = $F87C  ; <>0 when loading program
defc SAVEND = $F87D  ; End address for BSAVE
defc FNKSTR = $F87F  ; FUNCTION KEY AREA
defc CGPNT  = $F91F  ; Address to store charecter font in ROM
;; defc CGTABL = $0004  ; Found in CBIOS..  does it exist on the regular BIOS too ?
defc SLOTID = $F91F	 ; 1 Character set SlotID 
defc CHFONT = $F920	 ; 2 Character set address 
defc NAMBAS = $F922  ; Base address of current pattern name table
defc CGPBAS = $F924  ; Base address of current pattern generator table
defc PATBAS = $F926  ; Base address of current sprite generator table
defc ATRBAS = $F928  ; Base address of current sprite attribute table
defc CLOC   = $F92A  ; (CHKROM/CLOC)
defc CMASK  = $F92C
defc MINDEL = $F92D
defc MAXDEL = $F92F

; DATA AREA FOR CIRCLE STATEMENT
defc ASPECT = $F931  ; Aspect ratio of the circle; set by <ratio> of CIRCLE
defc CENCNT = $F933  ; End count
defc CLINEF = $F935  ; Flag to draw line to centre
defc CNPNTS = $F936  ; Point to be plottted
defc CPLOTF = $F938  ; Plot polarity flag
defc CPCNT  = $F939  ; 1/8 of number of points in circle
defc CPCNT8 = $F93B
defc CRCSUM = $F93D
defc CSTCNT = $F93F
defc CSCLXY = $F941  ; Scale of X & Y
defc CSAVEA = $F942  ; reservation area of ADVGRP
defc CSAVEM = $F944  ; reservation area of ADVGRP
defc CXOFF  = $F945  ; X offset from center
defc CYOFF  = $F947  ; Y offset from center

; DATA AREA FOR PAINT STATEMENT
defc LOHMSK = $F949
defc LOHDIR = $F94A
defc LOHADR = $F94B
defc LOHCNT = $F94D
defc SKPCNT = $F94F  ; Skip count
defc MOVCNT = $F951  ; Movement count
defc PDIREC = $F953  ; Direction of the paint
defc LFPROG = $F954
defc RTPROG = $F955

defc MCLTAB = $F956
defc MCLFLG = $F958

defc QUETAB = $F959
defc QUEBAK = $F971
defc VOICAQ = $F975
defc VOICBQ = $F9F5
defc VOICCQ = $FA75

; FOR MSX 2 ONLY ?
defc DPPAGE  = $FAF5    ;  Display page number

defc ACPAGE  = $FAF6
defc AVCSAV  = $FAF7    ;  Reserves AV control port
defc EXBRSA  = $FAF8	;  1 Slot address of the SUBROM (EXtended Bios-Rom Slot Address) 

defc CHRCNT  = $FAF9    ;  Character counter in the buffer used in Roman-Kana translation
defc ROMA    = $FAFA    ;  Area to store character (Japan version only)
defc MODE    = $FAFC    ;  mode svitch for VRAM size
defc NORUSE  = $FAFD    ;  unused
defc XSAVE   = $FAFE    ;  [10000000 XXXXXXXX]
defc YSAVE   = $FB00    ;  [*0000000 YYYYYYYY] *-light pen interrupt request
defc LOGOPR  = $FB02    ;  Logical operation code

; Data area used by RS-232C or disk drive
defc RSTMP   = $FB03
defc TOCNT   = $FB03
defc RSFCB   = $FB04
defc RSIQLN  = $FB06
defc MEXBIH  = $FB07
defc OLDSTT  = $FB0C
defc OLDINT  = $FB12
defc DEVNUM  = $FB17
defc DATCNT  = $FB18
defc ERRORS  = $FB1B
defc FLAGS   = $FB1C
defc ESTBLS  = $FB1D
defc COMMSK  = $FB1E
defc LSTCOM  = $FB1F
defc LSTMOD  = $FB20

; Data area used by MSX-DOS
defc DRVINF  = $FB21	;1 Nr. of drives connected to disk interface 1 
defc DRVINF1 = $FB21	;1 Nr. of drives connected to disk interface 1 
defc DISKIF1 = $FB22	;1 Slot address of disk interface 1 
defc DRVINF2 = $FB23	;1 Nr. of drives connected to disk interface 2 
defc DISKIF2 = $FB24	;1 Slot address of disk interface 2 
defc DRVINF3 = $FB25	;1 Nr. of drives connected to disk interface 3 
defc DISKIF3 = $FB26	;1 Slot address of disk interface 3 
defc DRVINF4 = $FB27	;1 Nr. of drives connected to disk interface 4 
defc DISKIF4 = $FB28	;1 Slot address of disk interface 4 

defc PRSCNT = $FB35 ; Used by PLAY command in BASIC
defc SAVSP  = $FB36 ;  "
defc VOICEN = $FB38 ;  "
defc SAVVOL = $FB39 ;  "
defc MCLLEN = $FB3B ;  "
defc MCLPTR = $FB3C ;  "
defc QUEUEN = $FB3E
defc MUSICF = $FB3F
defc PLYCNT = $FB40
defc VCBA   = $FB41
defc VCBB   = $FB66
defc VCBC   = $FB8B
defc ENSTOP = $FBB0 ; <>0 if warm start enabled (CTRL+SHIFT+GRPH+KANA/CODE for warm start)
defc BASROM = $FBB1 ; <>0 if basic is in rom (CTRL+STOP disabled)

defc LINTTB = $FBB2  ; line terminator table (<>0 if line terminates)
defc FSTPOS = $FBCA  ; first position for inlin
defc CODSAV = $FBCC  ; code save area for cursor
defc FNKSWI = $FBCD  ; indicate which func key is displayed
defc FNKFLG = $FBCE  ; fkey which have subroutine
defc ONGSBF = $FBD8  ; global event flag
defc CLIKFL = $FBD9
defc OLDKEY = $FBDA  ; (key map)
defc NEWKEY = $FBE5  ; (key map)
defc KEYBUF = $FBF0  ;  key code buffer
defc BUFEND = $FC18  ;  end of key buffer
defc LINWRK = $FC18  ;  ^
defc PATWRK = $FC40  ;  Pattern Buffer
defc BOTTOM = $FC48
defc SYSMEM = $FC4A	;start address of system memory
defc HIMEM  = $FC4A ;^
defc TRPTBL = $FC4C
defc RTYCNT = $FC9A

defc INTFLG = $FC9B ; This flag is set if STOP (=4) or CTRL + STOP (=3) is pressed
defc PADY   = $FC9C ; Y-coordinate of a connected Graphics Tablet (PAD)
defc PADX   = $FC9D ; X-coordinate of a connected Graphics Tablet (PAD)

defc JIFFY  = $FC9E ; (TIMEVAR) Counter for the BASIC "time" function, each interrupt of the VDP  it is increased by 1. 
defc INTVAL = $FCA0 ; length of the interval when the ON INTERVAL routine was established.
defc INTCNT = $FCA2 ; ON INTERVAL counter (counts backwards)
defc LOWLIM = $FCA4 ; Used by the Cassette system (minimal length of startbit)
defc WINWID = $FCA5 ; Used by the Cassette system (store the difference between a low-and high-cycle)
defc GRPHED = $FCA6 ; flag for graph. char
defc ESCCNT = $FCA7 ; escape sequence counter
defc INSFLG = $FCA8 ; insert mode flag
defc CSRSW  = $FCA9 ; cursor display switch
defc CSTYLE = $FCAA ; cursor style i.e. Used if INS Key is used ( 00# = Full Cursor / FF# = Halve Cursor ) 
defc CAPST  = $FCAB ; capital status ( 00# = Off / FF# = On )
defc KANAST = $FCAC ; russian key status (Dead Keys) 1=DK, 2=SHIFT+DK, 3=CODE+DK, 4=SHIFT+CODE+DK
defc KANAMD = $FCAD
defc FLBMEM = $FCAE ; 0 if loading basic programm

defc SCRMOD = $FCAF ; screen mode
defc OLDSCR = $FCB0 ; old screen mode
defc CASPRV = $FCB1
defc BRDATR = $FCB2 ; border color for paint
defc GXPOS  = $FCB3 ; X-position
defc GYPOS  = $FCB5 ; Y-position
defc GRPACX = $FCB7
defc GRPACY = $FCB9
defc DRWFLG = $FCBB ; DrawFlag: Bit 7 = Draw Line (,N), Bit 6 = Move Cursor (,B)
defc DRWSCL = $FCBC ; DrawScaling
defc DRWANG = $FCBD ; DrawAngle (0..3): 1=90 degrees rotation .. 3=270 degrees, etc..

defc RUNBNF = $FCBE ; Run Binary File After loading ( Bload"File.Bin",R ) 0 = Don't Run / 1 = Run
defc SAVENT = $FCBF ; start address for BSAVE / BLOAD operations

; FCC1H  --  slot-address of main-ROM
defc EXPTBL = $FCC1	;1 Slot 0: #80 = expanded, 0 = not expanded. Also slot address of the main BIOS-ROM. 
defc EXP0 = $FCC1	;1 Expansion Slot 0
defc EXP1 = $FCC2	;1 Expansion Slot 1
defc EXP2 = $FCC3	;1 Expansion Slot 2
defc EXP3 = $FCC4	;1 Expansion Slot 3
defc SLTTBL = $FCC5	;1 Mirror of slot 0 secondary slot selection register. 
defc SLT0 = $FCC5	;1 Mirror of slot 0...
defc SLT1 = $FCC6	;1 Mirror of slot 1...
defc SLT2 = $FCC7	;1 Mirror of slot 2...
defc SLT3 = $FCC8	;1 Mirror of slot 3...

defc SLTATR = $FCC9 ; Slotatributes found starting: Bit 7 = Basic prog, Bit 6 = Dev Ext, Bit 5 = Stmt Ext
defc SLTWRK = $FD09 ; (free word = FD09H + 32*basic slot + 8*expansion slot + 2*page)
defc PROCNM = $FD89 ; name of expanded statement
defc DEVICE = $FD99 ; device ID for cartrige 0-3


; -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
; BASIC locations
; -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

defc WARM_BT = $409B	; address of "warm boot" BASIC interpreter

defc DOTLINE = $58FC	; LINE (BC,DE)-(GXPOS,GYPOS)
defc DOBOXF  = $58C1
defc BOXLIN  = $5912
defc DO_CIRC = $5B19	;

;; defc PSET    = $57F5
defc DOPSET  = $57F5    ; (X = (BC), Y = (DE))

defc N_PAINT = $266E	; (color = (A), X = (BC), Y = (DE)) -
defc O_PAINT = $59E3	; - init: CALL 0129H (PNTINI in msxbios), then CALL PAINT (BC,DE)


; --------------------------------------------------------------------------

; TRPTBL (78) - Data table for the interrupt facilities of the MSX computer.
; IFLG_* byte meaning:
;                  Bit 7-3 - unused
;                  Bit 2   - Interrupt occurred Y/N   1= Yes
;                  Bit 1   - Interrupt STOP  Y/N      1= Yes
;                  Bit 0   - Interrupt OFF Y/N        1= No


defc IFLG_F1       = $FC4C  ; F1 Key - Interrupt flags
defc IENTRY_F1     = $FC4D  ; F1 Key - Interrupt related code
defc IFLG_F2       = $FC4F  ; F2 Key - Interrupt flags
defc IENTRY_F2     = $FC50  ; F2 Key - Interrupt related code
defc IFLG_F3       = $FC52  ; F3 Key - Interrupt flags
defc IENTRY_F3     = $FC53  ; F3 Key - Interrupt related code
defc IFLG_F4       = $FC55  ; F4 Key - Interrupt flags
defc IENTRY_F4     = $FC56  ; F4 Key - Interrupt related code
defc IFLG_F5       = $FC58  ; F5 Key - Interrupt flags
defc IENTRY_F5     = $FC59  ; F5 Key - Interrupt related code
defc IFLG_F6       = $FC5B  ; F6 Key - Interrupt flags
defc IENTRY_F6     = $FC5C  ; F6 Key - Interrupt related code
defc IFLG_F7       = $FC5E  ; F7 Key - Interrupt flags
defc IENTRY_F7     = $FC5F  ; F7 Key - Interrupt related code
defc IFLG_F8       = $FC61  ; F8 Key - Interrupt flags
defc IENTRY_F8     = $FC62  ; F8 Key - Interrupt related code
defc IFLG_F9       = $FC64  ; F9 Key - Interrupt flags
defc IENTRY_F9     = $FC65  ; F9 Key - Interrupt related code
defc IFLG_F10      = $FC67  ; F10 Key - Interrupt flags
defc IENTRY_F10    = $FC68  ; F10 Key - Interrupt related code

defc IFLG_STOP     = $FC6A  ; STOP button - Interrupt flags
defc IENTRY_STOP   = $FC6B  ; STOP button - Interrupt related code
defc IFLG_COLLSN   = $FC6D  ; Sprite collision - Interrupt flags
defc IENTRY_COLLSN = $FC6E  ; Sprite collision - Interrupt related code

defc IFLG_STRIG0   = $FC70  ; SPACE key trigger - Interrupt flags
defc IENTRY_STRIG0 = $FC71  ; SPACE key trigger - Interrupt related code
defc IFLG_STRIG1   = $FC73  ; Joystick 1, Fire 1 - Interrupt flags
defc IENTRY_STRIG1 = $FC74  ; Joystick 1, Fire 1 - Interrupt related code
defc IFLG_STRIG2   = $FC76  ; Joystick 2, Fire 1 - Interrupt flags
defc IENTRY_STRIG2 = $FC77  ; Joystick 2, Fire 1 - Interrupt related code
defc IFLG_STRIG3   = $FC79  ; Joystick 1, Fire 2 - Interrupt flags
defc IENTRY_STRIG3 = $FC7A  ; Joystick 1, Fire 2 - Interrupt related code
defc IFLG_STRIG4   = $FC7C  ; Joystick 2, Fire 2 - Interrupt flags
defc IENTRY_STRIG4 = $FC7D  ; Joystick 2, Fire 2 - Interrupt related code

defc IFLG_TIMER    = $FC7F  ; TIMER - Interrupt flags
defc IENTRY_TIMER  = $FC80  ; TIMER - Interrupt related code

; --------------------------------------------------------------------------
lston

