;license:MIT
;(c) 2020 by 4am
;

; soft switches
KBD =          $C000      ; last key pressed (if any)
STOREOFF =     $C000      ; STA then use the following 4 flags:
READMAINMEM =  $C002      ; STA to read from main mem
READAUXMEM =   $C003      ; STA to read from aux mem
WRITEMAINMEM = $C004      ; STA to write to main mem
WRITEAUXMEM =  $C005      ; STA to write to aux mem
CLRC3ROM =     $C00A      ; STA to use internal Slot 3 ROM (required to use 128K and DHGR)
SETC3ROM =     $C00B      ; STA to use external Slot 3 ROM (required to detect VidHD in slot 3)
CLR80VID =     $C00C      ; 40 columns (also used to get out of DHGR mode)
SET80VID =     $C00D      ; 80 columns (also used to get into DHGR mode)
PRIMARYCHARSET= $C00E     ; no mousetext for you
CLEARKBD =     $C010      ; clear last key pressed
SPEAKER =      $C030      ; chirp chirp
CLOCKCTL =     $C034      ; bits 0-3 are IIgs border color (also VidHD)
GFXMODE =      $C050
TEXTMODE =     $C051
FULLGFX =      $C052
MIXGFX =       $C053
PAGE1 =        $C054      ; page 1 (affects text, HGR, DHGR)
PAGE2 =        $C055      ; page 2 (affects text, HGR, DHGR)
LORES =        $C056
HIRES =        $C057

; ROM routines and addresses
ROM_TEXT =     $FB2F
ROM_MACHINEID =$FBB3
ROM_HOME =     $FC58
ROM_WAIT =     $FCA8
ROM_COUT =     $FDED
ROM_NORMAL =   $FE84      ; NORMAL text (instead of INVERSE or FLASH)
ROM_IN0 =      $FE89      ; SETKBD
ROM_PR0 =      $FE93      ; SETVID

; zero page
PARAM        = $00        ; word (used by PARAMS_ON_STACK macro, so basically everywhere)
PTR          = $02        ; word
SRC          = $04        ; word
DEST         = $06        ; word
SAVE         = $08        ; word
HTAB         = $24        ; byte
VTAB         = $25        ; byte
RNDSEED      = $4E        ; word

; application constants
original_char = $ED       ; byte
char         = $EE        ; byte
charrow      = $EF        ; byte
GENSCROLLDOWN = $0800     ; 0x0900 bytes
GENSCROLLUP  = $1100      ; 0x0900 bytes
HGRLO        = $1A00      ; 0xC0 bytes
HGRHI        = $1B00      ; 0xC0 bytes