;************************************************************************ ;* Super Famicom Disk Operation Sysytem main routine * ;* Programmed by Y.Nishida * ;* [ Aug.21, 1991 ] * ;************************************************************************ native extend include PPUregs.h include CPUregs.h include sfxdos.h DOS_main sect rel SFXDOS group DOS_main dpage DOS_variable dbank 00H ;=============== Cross definition ======================================= sfxdos equ 0 global sfxdos global NMI_Entry global IRQ_Entry ;=============== Cross Reference ======================================== extern FDC_Driver extern FDC_Interrupt extern SCC_Interrupt extern CON_Driver_NMI ;------------------------------------------------------------------------ extern Init_CON_Driver extern Input_Console extern Output_Console extern Input_String extern Print_String ;------------------------------------------------------------------------ extern Init_SCC_Driver ; Initial SCC(Z8530) driver extern Enable_SCC_Int ; Enable SCC interrupt extern Disable_SCC_Int ; Disable SCC interrupt extern Flush_Keyboard ; Flush keyboard buffer extern Input_Keyboard ; Input keyboard extern Output_Keyboard ; Output keyboard extern Sense_Keyboard ; Input sense keyboard extern Reset_RS232C ; Reset RS232C extern Input_RS232C ; Input data from RS232C extern Output_RS232C ; Output data to RS232C extern Sense_RS232C ; Ssense RS232C ;------------------------------------------------------------------------ extern Init_PPI_Driver ; Initial PPI(uPD71055) driver extern Sense_Printer ; Sense printer output extern Output_Printer ; Output printer ;------------------------------------------------------------------------ extern Init_FDC_Driver ; Initial FDC(uPD72069) driver extern Enable_FDC_Int ; Enable FDC interrupt extern Disable_FDC_Int ; Disable FDC interrupt extern Disk_Format ; Disk format extern Disk_Free ; Disk free extern Files_First ; Search first file extern Files_Next ; Search next file extern Select_Drive ; Select dirve extern Load_File ; Load file extern Save_File ; Save file extern Purge_File ; Purge file extern Rename_File ; Rename file ;************************************************************************ ;* SFXDOS Reset ( SFX initialize ) * ;* * ;************************************************************************ mem8 idx8 DOS_Entry sei ; IRQ disable rep #00001001B ; Set binary mode xce ; Set native mode ;=============== Initial DMA & PPU ==================================== DOS_Entry_10 sep #00110000B ; Memory,Index 8 bit mode stz Int_control ; NMI,IRQ disable stz MDMA_start ; M_DMA all enable stz HDMA_switch ; H_DMA all enable lda #10000000B sta Screen_contrast ; Screen blanking stz PPU_control ; Set PPU mode stz 4016H ; Controller auto scan ;=============== Inital D reg & SP ==================================== DOS_Entry_20 mem16 rep #00100000B ; Memory 16 bit mode ;------------------------------------------------------------------------ lda #DOS_variable tcd ; Set Direct register lda #01FFH tcs ; Set stack pointer ;------------------------------------------------------------------------ lda #0000H pha ; Push user Direct register ;=============== Initial work RAM ===================================== DOS_Entry_30 ldx #00H lda #1E00H sta DRAM_address+0 ; Set DRAM address stx DRAM_address+2 ; Set DRAM bank ;------------------------------------------------------------------------ lda #8008H sta DMA_channel0+0 ; Set DMA control & B bus address lda #Clear_data sta DMA_channel0+2 ; Set A bus address stx DMA_channel0+4 ; Set A bus bank lda #1200H sta DMA_channel0+5 ; Set number of bytes ldx #00000001B stx MDMA_start ; Clear all work RAM ( 7E:1E00H - 7E:2FFFH ) ;------------------------------------------------------------------------ lda IRQ_vector sta IRQ_address ; Set user IRQ routine address lda NMI_vector sta NMI_address ; Set user NMI routine address ;************************************************************************ ;* SFX-DOS initialize * ;* * ;************************************************************************ mem8 idx8 DOS_initialize sep #00110000B ; Memory,Index 8 bit mode ;=============== Initialize Driver routine ============================== jsr Init_SCC_Driver jsr Init_PPI_Driver lda #00H jsr Init_FDC_Driver ;------------------------------------------------------------------------ lda #11111111B sta