;-------------------------------------------------------------------------------
; GMOD3 registers and -bits
;
; for details see http://wiki.icomp.de/wiki/GMod3
;-------------------------------------------------------------------------------

GMOD3_BANK0 = $de00 ;  $00- $ff
GMOD3_BANK1 = $de01 ; $100-$1ff 4MB and higher versions only
GMOD3_BANK2 = $de02 ; $200-$2ff 8MB and higher versions only
GMOD3_BANK3 = $de03 ; $300-$3ff 8MB and higher versions only
GMOD3_BANK4 = $de04 ; $400-$4ff 16MB version only
GMOD3_BANK5 = $de05 ; $500-$5ff 16MB version only
GMOD3_BANK6 = $de06 ; $600-$6ff 16MB version only
GMOD3_BANK7 = $de07 ; $700-$7ff 16MB version only

GMOD3_BANKLO_R = $de00
GMOD3_BANKHI_R = $de08

GMOD3_CTRL  = $de08
GMOD3_CTRL_BITBANG          = %10000000     ; 1: SPI bitbanging enabled
GMOD3_CTRL_BITBANG_ENABLED  = %10000000     ; SPI bitbanging enabled
GMOD3_CTRL_BITBANG_DISABLED = %00000000     ; SPI bitbanging not enabled
GMOD3_CTRL_EXROM            = %01000000
GMOD3_CTRL_8KGAME           = %00000000
GMOD3_CTRL_NOCART           = %01000000
GMOD3_CTRL_VECTORS          = %00100000     ; replace the hw vectors

; when bitbang mode is enabled:

GMOD3_SPI_R = $de00
GMOD3_SPI_R_DATA            = %10000000

GMOD3_SPI_W = $de00
GMOD3_SPI_W_CS              = %01000000     ; 0: Flash selected
GMOD3_SPI_W_CS_ACTIVE       = %00000000     ; Flash selected
GMOD3_SPI_W_CS_INACTIVE     = %01000000     ; Flash not selected
GMOD3_SPI_W_CLK             = %00100000     ; data is latched on 0->1 transition
GMOD3_SPI_W_CLK_LO          = %00000000     ; clk 0
GMOD3_SPI_W_CLK_HI          = %00100000     ; clk 1
GMOD3_SPI_W_DATA            = %00010000
GMOD3_SPI_W_DATA_LO         = %00000000
GMOD3_SPI_W_DATA_HI         = %00010000

;-------------------------------------------------------------------------------
; Flash commands
;
; for details look at the datasheet, the following are just the commands used
; in the example functions - all other regular SPI commands work, of course.
;-------------------------------------------------------------------------------

FLASH_CMD_PAGE_PROGRAM  =   $02
FLASH_CMD_READ_DATA     =   $03
FLASH_CMD_READ_STATUS   =   $05
FLASH_CMD_WRITE_ENABLE  =   $06
FLASH_CMD_BLOCK_ERASE   =   $d8     ; erase 64k
FLASH_CMD_REMS          =   $9f

FLASH_STATUS_BUSY       =   $01