; ===================================================
; MSX BASIC for Orion-128
;
; Uninitialized variables
; Disassembled by Romychs @ 2026-10-15
; ===================================================

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

    ORG   0x891C
OR_SCRN_MODE:
    DS    1

OR_KEY_CLICK_OFF:
    DS    1

MB_CRY:
    DS    1

MB_CRX:
    DS    1

MB_FNK_VIS:
    DS    1

OR_KB_TOGGLE_LOCK1:
    DS    1
OR_KB_TOGGLE_LOCK2:
    DS    1
OR_KB_REPEAT_CNT:
    DS    1
OR_KB_REPEAT_INIT:
    DS    1
OR_KB_REPEAT_RELOAD:
    DS    1
OR_KB_SCAN_DONE:
    DS    1
OR_KB_REPEAT_FLG:
    DS    1
OR_KB_SCAN_PTR:
    DS    1
    DS    1
OR_KB_SCAN_CNT:
    DS    1
MB_BPARAM1:
    DS    88
MB_BPARAM2:
    DS    88
OR_KEYMAT_CUR:
    DS    1
OR_KEYMAT_CUR_PAD:
    DS    3
OR_MONO_PGCOLOR:
    DS    6
OR_MONO_TXTCOL:
    DS    1
OR_MONO_T32COL:
    DS    1
OR_MONO_GRPCGP:
    DS    8
OR_MONO_GRPCOL:
    DS    17

MSX_LINL40:
    DS    1
MSX_LINL32:
    DS    1
MSX_LINLEN:
    DS    1
MSX_CRTCNT:
    DS    1
MSX_CLMLST:
    DS    1
MSX_TXTCOL:
    DS    2
MSX_TXTCGP:
    DS    2
MSX_TXTATR:
    DS    2
MSX_TXTPAT:
    DS    2
MSX_T32NAM:
    DS    2
MSX_T32COL:
    DS    2
MSX_T32CGP:
    DS    2
MSX_T32ATR:
    DS    2
MSX_T32PAT:
    DS    2
MSX_GRPNAM:
    DS    2
MSX_GRPCOL:
    DS    2
MSX_GRPCGP:
    DS    2
MSX_GRPATR:
    DS    2
MSX_GRPPAT:
    DS    2
MSX_MLTNAM:
    DS    2
MSX_MLTCOL:
    DS    2
MSX_MLTCGP:
    DS    2
MSX_MLTATR:
    DS    2
MSX_MLTPAT:
    DS    2
MSX_CLIKSW:
    DS    1
MSX_CSRY:
    DS    1
MSX_CSRX:
    DS    1
MSX_CNSDFG:
    DS    1
MSX_RG0SAV:
    DS    1
MSX_RG1SAV:
    DS    1
MSX_RG2SAV:
    DS    1
MSX_RG3SAV:
    DS    1
MSX_RG4SAV:
    DS    1
MSX_RG5SAV:
    DS    1
MSX_RG6SAV:
    DS    1
MSX_RG7SAV:
    DS    1

; VDP status (contents of status register 0, in MSX2)
MB_STATFL:
    DS    1

; Trigger button status of joystick
MB_TRGFLG:
    DS    1

; Foreground colour; set by colour statement
MB_FORCLR:
    DS    1

; Background colour; set by colour statement
MB_BAKCLR:
    DS    1

; Border colour; set by colour statement
MB_BDRCLR:
    DS    1

; Used by CIRCLE statement internally
; JP xxxx code
MAXUPD:
    DS    1
; Address of procedure to draw next pixel
MAXUPD_ADDR:
    DS    2

; Used by CIRCLE statement internally
; JP xxxx code
MINUPD:
    DS    1
; Address of procedure to draw next pixel
MINUPD_ADDR:
    DS    2

; Colour code in using graphics
ATRBYT:
    DS    1

; Points to queue table at the execution of PLAY statement
MB_QUEUES:
    DS    2

MB_FRCNEW:
    DS    1

; Interval for the key scan
MB_SCNCNT:
    DS    1

; Delay until the auto-repeat of the key begins
MB_REPCNT:
    DS    1

; Points to address to write in the key buffer
MB_PUTPNT:
    DS    2

; Points to address to read from key buffer
MB_GETPNT:
    DS    2
MB_CS1200:
    DS    5
MB_CS2400:
    DS    5

; Width of LOW and HIGH which represents bit 0 of current baud rate; set by <cassette baud rate> of SCREEN statement
MB_LOW:
    DS    2

; Width of LOW and HIGH which represents bit 1 of current baud rate; set by <cassette baud rate> of SCREEN statement
MB_HIGH:
    DS    2

; Header bit for the short header of current baud rate (HEADLEN = 2000);
; set by <cassette baud rate> of SCREEN statement
MB_HEADER:
    DS    1

; 256/aspect ratio; set by SCREEN statement to use in CIRCLE statement
MB_ASPCT1:
    DS    2

; 256 * aspect ratio; set by SCREEN statement to use in CIRCLE statement
MB_ASPCT2:
    DS    2

; False end of program for RESUME NEXT statement
; default: ":"
MB_ENDPRG:
    DS    1
    DS    4

; ==================================================
; Work area used by BASIC internally
; ==================================================

; Area to store the error number
MB_ERRFLG:
    DS    1

; Printer head location
MB_LPTPOS:
    DS    1

; Flag whether to send to printer
MB_PRTFLG:
    DS    1

; Printer (0 = printer for MSX, otherwise not)
MB_NTMSXP:
    DS    1

; Non-zero when printing in raw-mode
MB_RAWPRT:
    DS    1

; Address of character to be replaced by VAL function
MB_VLZADDR:
    DS    2

; Character to be replaced with 0 by VAL function
MB_VLZDAT:
    DS    1

; Currenty executing line number of BASIC
MB_CURLIN:
    DS    2

; Crunch buffer; translated into intermediate language from BUF (F55EH)
MB_KBFMIN:
    DS    1

MB_KBUF:
    DS    318

; Used in INPUT statement. Initial value: ", ".
MB_BUFMIN:
    DS    1

MB_BUF:
    DS    2

MB_DIR_NAME_BUF:
    DS    8

MB_FLD_REC_TOP:
    DS    2
MB_FLD_DATA_PTR:
    DS    8

MB_DIR_ENTRY_PTR:
    DS    2

MB_OLD_FILE:
    DS    8
MB_NEW_FILE:
    DS    8


    DS    221

; Terminal position
MB_TTYPOS:
    DS    1

MB_DIMFLG:
    DS    1

; Type indicator of value
MB_VALTYP:
    DS    1

; Operation number
MB_DORES:
MB_OPRTYP:
    DS    1
MB_DONUM:
    DS    1

; Pointer to text after constant
MB_CONTXT:
    DS    2

; Saved token of the constant
MB_CONSAV:
    DS    1

; Saved constant VALTYP
MB_CONTYP:
    DS    1

; Saved constant value
MB_CONLO:
    DS    8

; Highest location in memory
MB_MEMSIZ:
    DS    2

MB_STKTOP:
    DS    2

; Address of BASIC program text
MB_TXTTAB:
    DS    2

; Pointer to first free TMP descritor
MB_TEMPP:
    DS    2

; Dtorage for NUMTMP descriptors
MB_TEMPST:
    DS    30                                        ; (STRSIZ*NUMTMP)

; String functions ansfer descriptor
MB_DSCTMP:
    DS    3                                         ; STRSIZ

; Top of string free space
MB_FRETOP:
    DS    2

MB_TEMP3:
    DS    2

MB_TEMP8:
    DS    2

; Saved text pointer to end of FOR statement
MB_ENDFOR:
    DS    2

; Number of DATA line for display at errors
MB_DATLIN:
    DS    2

; Using indexed variable flag
MB_SUBFLG:
    DS    1

; Flag whether we in INPUT
MB_FLGINP:
    DS    1

; Temporary variamble for statement code
MB_TEMP:
    DS    2

; 0 - no line number converted to pointers, != 0 if pointers exists
MB_PTRFLG:
    DS    1

; != 0 if AUTO in action
MB_AUTFLG:
    DS    1

; Current line in AUTO mode
MB_AUTLIN:
    DS    2

; AUTO Increment value
MB_AUTINC:
    DS    2

; Save pointer to RESUME statement
MB_SAVTXT:
    DS    2

; Saved stack value for error recovery
MB_SAVSTK:
    DS    2

; Line number where last error occured
MB_ERRLIN:
    DS    2

; Current line for edit and LIST
MB_DOT:
    DS    2

; Text pointer used for RESUME
MB_ERRTXT:
    DS    2

; Line for goto when an error occurs
MB_ONELIN:
    DS    2

; 1 if on error trap routine executed
MB_ONEFLG:
    DS    1

; Temp value for formula evaluation
MB_TEMP2:
    DS    2

; Old line number
MB_OLDLIN:
    DS    2

MB_OLDTXT:
    DS    2

; Pointer to simple variables space
MB_VARTAB:
    DS    2

; Pointer to begining of array table
MB_ARYTAB:
    DS    2

; Pointer to end of storage in use
MB_STREND:
    DS    2

; Pointer to DATA values
MB_DATPTR:
    DS    2

; Table of VALTYP for each one-char variables in alphabet order
MB_DEFTBL:
    DS    26

; Previous defined block on stack (for GC)
MB_PRMSTK:
    DS    2

; Number of bytes in active table
MB_PRMLEN:
    DS    2

; Active parameter definition table
MB_PARM1:
    DS    100                                       ; PRMSIZ EQU 100

; Pointer to previous parameter
MB_PRMPRV:
    DS    2

; Size of parameter block being build
MB_PRMLN2:
    DS    2

; Place to keep parameters being made
MB_PARM2:
    DS    100                                       ; PRMSIZ EQU 100

; Used by MB_PTRGET to flag if MB_PARM1 has been searched
MB_PRMFLG:
    DS    1

; Stopping point for simple search
MB_ARYTA2:
    DS    2

; 0 if no functions active.
MB_NOFUNS:
    DS    1

; Temporary pointer for GC, to chain trough parameter blocks
MB_TEMP9:
    DS    2

; Destination line in new program
MB_CHNLIN:
    DS    2

; Swap variable, enough spave for DBL variable
MB_SWPTMP:
    DS    8

; 1 -  Trace in progress, 0 - no trace
MB_TRCFLG:
    DS    1

MB_FBUFFR:
    DS    43

MB_DECTMP:
    DS    2

MB_DECTM2:
    DS    2

MB_DECCNT:
    DS    2

MB_DACC:
    DS    16

MB_HOLD8:
    DS    65

MB_ARG:
    DS    16

MB_RNDX:
    DS    8

; ==================================================
; Data area used by BASIC interpreter
; ==================================================

; Maximum file number; set by MAXFILES statement
MB_MAXFIL:
    DS    1

; Starting address of file data area
MB_FILTAB:
    DS    2

; Pointer to buffer #0. Buffer for disk operations in SAVE/LOAD subroutines
MB_NULBUF:
    DS    2

; Address of file data of currently accessing file
MB_PTRFIL:
    DS    2

; Area to store filename
MB_FILNAM:
    DS    11

; Area to store filename
MB_FILNM2:
    DS    11

; Non-zero value if program is being loaded
MB_NLONLY:
    DS    1

; End address of assembly language program to be saved.
; (Also used as position in a file by Orion code)
MB_SAVEND:
    DS    2

; Area to store function key string (16 character x 10)
MB_FNKSTR:
    DS    160

; Unused. Address to store character font on ROM
MB_CGPNT:
    DS    2
    DS    1

; Unused. Base address of current pattern name table
MB_NAMBAS:
    DS    2

; Unused. Base address of current pattern generator table
MB_CGPBAS:
    DS    2

; Unused. Base address of current sprite generator table
MB_PATBAS:
    DS    2

; Unused. Base address of current sprite attribute table
MB_ATRBAS:
    DS    2

; Used internally by graphic routine
MB_CLOC:
    DS    2

; Used internally by graphic routine
MB_CMASK:
    DS    1

; Used internally by graphic routine
MB_MINDEL:
    DS    2

; Used internally by graphic routine
MB_MAXDEL:
    DS    2

; ==================================================
; Data area used by CIRCLE statement
; ==================================================

; Aspect ratio of the circle; set by <ratio> of CIRCLE statement
MB_ASPECT:
    DS    2

; Used internally by CIRCLE statement
MB_CENCNT:
    DS    2

; Flag whether a line is drawn toward the center; specified by <angle> of CIRCLE statement
MB_CELINEF:
    DS    1

; Point to be plotted
MB_CNPNTS:
    DS    2

; Used internally by CIRCLE statement
MB_CPLOTF:
    DS    1

; Number of one eighth of the circle
MB_CPCNT:
    DS    2

; Used internally by CIRCLE statement
MB_CPCNT8:
    DS    2

; Used internally by CIRCLE statement
MB_CRCSUM:
    DS    2

; Used internally by CIRCLE statement
MB_CSTCNT:
    DS    2

; Scale of x and y
MV_CSCLXY:
    DS    1

; Reservation area of ADVGRP
MB_CSAVEA:
    DS    2

; Reservation area of ADVGRP
MB_CSAVEM:
    DS    1

; X offset from the center
MB_CXOFF:
    DS    2

; Y offset from the center
MB_CYOFF:
    DS    2

; ==================================================
; Data area used in PAINT statement
; ==================================================

; Used internally by PAINT statement
MB_LOHMSK:
    DS    1

; Used internally by PAINT statement
MB_LOHDIR:
    DS    1

; Used internally by PAINT statement
MB_LOHADR:
    DS    2

; Used internally by PAINT statement
MB_LOHCNT:
    DS    2

; Skip count
MB_SKPCNT:
    DS    2

; Move count
MB_MOVCNT:
    DS    2

; Direction of the paint
MB_PDIREC:
    DS    1
; Used internally by PAINT statement
MB_LFPROG:
    DS    1
; Used internally by PAINT statement
MB_RTPROG:
    DS    1

; ==================================================
; Data area used in PLAY statement
; ==================================================

; Points to the top of the table of PLAY macro or DRAW macro
MB_MCLTAB:
    DS    2

; Assignment of PLAY/DRAW
MB_MCLFLG:
    DS    1

; Queue table
; +0: PUT offset
; +1: GET offset
; +2: backup character
; +3: queue length
; +4: queue address
; +5: queue address
MB_QUETAB:
    DS    24

; Used in BCKQ
MB_QUEBAK:
    DS    4

MB_MCLLEN:
    DS    1

MB_MCLPTR:
    DS    2
    DS    1
MB_INSFLG_TBL:
    DS    1
MB_FNK_LINE_BUF:
    DS    1
MB_RSVD_8FCB:
    DS    5

; Flag to enable warm start by [SHIFT+Ctrl+Kana key] (0 = disable, otherwise enable)
MB_ENSTOP:
    DS    1

; Indicates BASIC text location (0 = on RAM, otherwise in ROM)
MB_BASROM:
    DS    1

; Line terminal table; area to keep information about each line of text screen
MB_LINTTB:
    DS    24

; First character location of line from INLIN (00B1H) of BIOS
MB_FSTPOS:
    DS    2

; Area to reserve the character where the cursor is stacked
MB_CODSAV_1:
    DS    1

; Indicates which function key is displayed at KEY ON (1 = F1 to F5 is displayed, 0 = F6 to F10 is displayed)
MB_FNKSW1:
    DS    1

; Area to allow, inhibit, or stop the execution of the line defined in ON KEY GOSUB statement, or to reserve it for each function key; set by KEY(n)ON/OFF/STOP statement (0 = KEY(n)OFF/STOP, 1 = KEY(n)ON)
MB_FNKFLG:
    DS    10

; Flag to indicate whether event waiting in MB_TRPTBL occurred
MB_ONGSBF:
    DS    1

; Key click flag
MB_CLIKFL:
    DS    1

; Key matrix status (old)
MB_OLDKEY:
    DS    11

MB_NEWKEY:
    DS    11

MB_KEYBUF:
    DS    40

MB_LINWRK:
    DS    26

MB_BLINK_CELL_SAVE:
    DS    1

; Installed RAM starting (low) address; ordinarily 8000H in MSX2
MB_BOTTOM:
    DS    2

; Highest address of available memory; set by <memory upper limit> of CLEAR statement
MB_HIMEM:
    DS    2

MB_TRPTBL:
    DS    78

MB_RTYCNT:
    DS    1

; If Ctrl+STOP is pressed, setting 03H here causes a stop
MB_INTFLG:
    DS    1

; Y-coordinate of the paddle
MB_PADY:
    DS    1

; X-coordinate of the paddle
MB_PADX:
    DS    1

; Used internally by PLAY statement
MB_JIFFY:
    DS    2

; Interval period; set by ON INTERVAL GOSUB statement
MB_INTVAL:
    DS    2

; Counter for interval
MB_INTCNT:
    DS    2

; Used during reading from cassette tape
MB_LOWLIM:
    DS    1

; Used during reading from cassette tape
MB_WINWID:
    DS    1

; Flag to send graphic character (1 = graphic character, 0 = normal character)
MB_GRPHED:
    DS    1

; Whether cursor is displayed (0 = no, otherwise = yes); set by <cursor switch> of LOCATE statement
MB_CSRSW:
    DS    1

; Cursor shape (0 = block, otherwise = underline)
MB_CSTYLE:
    DS    1

; CAPS key status (0 = CAP OFF, otherwise = CAP ON)
MB_CAPST:
    DS    1

; Kana key status (0 = kana OFF, otherwise = kana ON)
MB_KANAST:
    DS    1

; Kana key arrangement status (0 = 50-sound arrangement, otherwise = JIS arrangement)
MB_KANAMD:
    DS    1

; 0 when loading BASIC program
MB_FLBMEM:
    DS    1

; Current screen mode number
MB_SCRMOD:
    DS    1

; Screen mode reservation area
MB_OLDSCR:
    DS    1

; Character reservation area used by CAS
MB_CASPRV:
    DS    1

; Border colour code used by PAINT; set by <border colour> in PAINT statement
MB_BRDAT:
    DS    1

; Graphics X-coordinate
MB_GXPOS:
    DS    2

; Graphics Y-coordinate
MB_GYPOS:
    DS    2

; Graphic accumulator (X-coordinate)
MB_GRPACX:
    DS    2

; Graphic accumulator (Y-coordinate)
MB_GRPACY:
    DS    2

; Flag used in DRAW statement
MB_DRWFLG:
    DS    1

; DRAW scaling factor (0 = no scaling, otherwise = scaling)
MB_DRWSCL:
    DS    1

; Angle at DRAW
MB_DRWANG:
    DS    1

; Flag to indicate BLOAD in progress, BSAVE in progress, or neither
MB_RUNBNF:
    DS    1

; Starting address of BSAVE
MB_SAVENT:
    DS    2
; Stores name of expanded statement (after CALL statement) or expansion device (after OPEN); 0 indicates the end
MB_PROCNM:
    DS    16

; Used to identify cartridge device
MB_DEVICE:
    DS    1

; Last initialized variable label
MB_LINIVAR:
    DS    1