Update BIOS.asm

BIOS.asm

@@ -37,127 +37,11 @@ SUB_JUMP_TABLE:         DC.W        SP_INIT-SUB_JUMP_TABLE
 ;       ON A SINGLE COUROUTINE AFTER THE INITIAL BOOT
 ;--------------------------------------------------------
 
-SP_IRQ:
-    RTS
-
 SP_INIT:
-    BIOS_MUSIC_STOP
-    ANDI.B          #$FA, $FF8003               ;; SET SUB CPU MEMORY TO 2M
-    BSR             INIT_ISO9660                ;; AFTER WHICH, BRANCH OFF TO INITIALISE THE CD
-    CLR.B           $FF800F                     ;; CLEAR THE STATUS FLAG TO INITIAL DRIVE   
-    MOVEQ           #0, D0
     RTS
 
-DRIVE_INIT_PARAMS:
-    DC.B        1, $FF
-    EVEN
-
-SP_INIT_DRIVE:
-    MOVEQ       #0, D0
-    LEA         DRIVE_INIT_PARAMS(PC), A0
-    BIOS_DRV_INIT
-    BIOS_CDC_STOP
-    BIOS_CDC_STATUS
-
 SP_MAIN:
-    TST.B   $FF800E
     BNE     SP_MAIN
-    MOVE.B  #1, $FF800F
-
-    MOVEQ   #0, D1
-    MOVE.B  $FF800E, D1
-    BTST    #7, D1
-    BNE     @DRIVE_DLL
-    ANDI.B  #$7F, D1    
-    ADD.W   D1, D1
-    ADD.W   D1, D1
-    JSR     OPERAND_TABLE
-    MOVEQ   #0, D0
-    MOVE.B  $FF800E, D0  
-    ADD.W   D0, D0
-    ADD.W   D0, D0
-    MOVE.L  OPERAND(PC), A0
-    MOVE.L  (A0, D0.W), A0
-    JSR     (A0)
-    MOVE.B  #0, $FF800F
-    BRA     SP_MAIN
-
-@DRIVE_DLL:
-    ANDI.B  #$7F, D1
-    ADD.W   D1, D1
-    ADD.W   D1, D1
-    ADD.W   D1, D1
-    LEA     (SUB_DRIVE_DLL_ALIGN+$10).L, A6     
-    ADDA.W  #4, A6
-    ADDA.W  D1, A6
-    MOVEA.L (A6), A6
-    JSR     (A6)
-    MOVE.B  #0, SUB_SECOND_FLAG
-    BRA     SP_MAIN
-
-OPERAND_TABLE:
-OPERAND:
-    BRA.W           OP_NULL
-    BRA.W           OP_GET_WORD_RAM
-    BRA.W           OP_LOAD_FILE_NAME
-
-OP_GET_WORD_RAM:
-    BSET            #0, $FF8003                       
-    RTS
-
-OP_LOAD_FILE_NAME:
-    LEA             @BOOT(PC),A0
-    BSR             FIND_FILE
-    MOVE.L          #$80000, A0
-    BSR             READ_CD
-    RTS
-
-@BOOT:
-    DC.B            'hello.BIN', 0
-    even
 
-OP_NULL:
-    RTS
-
-INIT_ISO9660:                   
-    PUSH            D0-D7/A0-A6           ;; STORE ALL RELEVANT REGISTERS FOR CACHE
-    MOVE.L          #$10, D0              ;; START OFFSET FOR PARSING DISC
-    MOVE.L          #$2, D1               ;; OFFSET SIZE  
-    LEA.L           SP_SECTOR, A0         ;; EVALUATE THE START OFFSET AT THE EFFECTIVE ADDRESS
-    BSR             READ_CD               ;; READ THE CONTENTS OF THE CD
-
-    LEA.L           SP_SECTOR, A0         ;; GET THE POINTER OFFSET CURRENTLY AT A0
-    LEA.L           156(A0), A1           ;; STORE THE ROOT DIRECTORY RECORD FROM A0 AND LOAD IT INTO A1
-
-    MOVE.B          6(A1), D0             ;; GET THE FIRST PART OF THE SECTOR OFFSET
-    LSL.L           #8, D0                ;; SHIFT LEFT LOGICAL BY 8 BITS
-    MOVE.B          7(A1), D0
-    LSL.L           #8, D0
-    MOVE.B          8(A1), D0
-    LSL.L           #8, D0
-    MOVE.B          9(A1), D0
-
-    MOVE.L          #$20, D1              ;; SIZE OF SECTOR OFFSET
-    BSR             READ_CD
-
-    POP             D0-D7/A0-A6           ;; RESTORE REGISTERS
+SP_IRQ:
     RTS
-
-READ_CD:
-    PUSH            D0-D7/A0-A6           ;; STORE ALL RELEVANT REGISTERS FOR CACHE
-    LEA             BIOS_INIT_STDCALL(PC), A5
-    MOVE.L          D0, (A5)
-    MOVE.L          D1, 4(A5)
-    MOVE.L          A0, 8(A5)
-    MOVEA.L         A5, A0
-    BIOS_CDC_STOP
-    BIOS_ROM_READ_SECTOR
-
-FIND_FILE:
-    PUSH            A1/A2/A6              ;; STORE USED REGISTERS FOR READING CD FILE
-    LEA.L           SP_SECTOR, A1         ;; LOAD THE SECTOR OFFSET INTO A1
-
-BIOS_INIT_STDCALL:
-    DC.L            0, 0, 0, 0, 0
-HEADER:
-    DS.L            32