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;****************************************************************************
; EntryPoint
; Where the program starts
;****************************************************************************
EntryPoint:
move.w #$2700, sr ; Disable interrupts
move.b ($A10001), d0 ; Disable TMSS if needed
and.b #$0F, d0
beq.s @NoTMSS
move.l #"SEGA", ($A14000)
@NoTMSS:
bsr InitJoypad ; Init joypad
lea ($C00004), a0 ; Init VDP
move.w #$8004, (a0) ; No IRQ4, no HV latch
move.w #$8114, (a0) ; Disable display
move.w #$8230, (a0) ; Scroll A: $C000
move.w #$8407, (a0) ; Scroll B: $E000
move.w #$8578, (a0) ; Sprites: $F000
move.w #$8700, (a0) ; Background: pal 0, color 0
move.w #$8B00, (a0) ; No IRQ2, full scroll
move.w #$8C81, (a0) ; H40, no S/H, no interlace
move.w #$8D3E, (a0) ; HScroll: $F800
move.w #$8F02, (a0) ; Autoincrement: 2 bytes
move.w #$9001, (a0) ; Scroll size: 64x32
move.w #$9100, (a0) ; Hide window plane
move.w #$9200, (a0) ; " " "
moveq #0, d0 ; Clear VRAM
move.l #$40000000, (a0)
lea ($C00000), a1
move.w #$800-1, d1
@ClearVRAM:
move.l d0, (a1)
move.l d0, (a1)
move.l d0, (a1)
move.l d0, (a1)
move.l d0, (a1)
move.l d0, (a1)
move.l d0, (a1)
move.l d0, (a1)
dbf d1, @ClearVRAM
move.l #$C0000000, (a0) ; Clear CRAM
moveq #8-1, d1
@ClearCRAM:
move.l d0, (a1)
move.l d0, (a1)
move.l d0, (a1)
move.l d0, (a1)
dbf d1, @ClearCRAM
move.l #$40000010, (a0) ; Clear VSRAM
move.l d0, (a1)
lea (PointerList), a0 ; Initialize Echo
bsr Echo_Init
bsr LoadFont ; Load font
lea ($C00004), a0 ; Load palette
lea ($C00000), a1
move.l #$C0020000, (a0)
move.l #$066600CE, (a1)
move.l #$000E000E, (a1)
move.l #$C0220000, (a0)
move.l #$06660EEE, (a1)
move.l #$000E000E, (a1)
move.l #$C0420000, (a0)
move.l #$04440E88, (a1)
move.l #$C0620000, (a0)
move.l #$04440888, (a1)
move.l #$C00A0000, (a0)
move.l #$02220444, (a1)
move.l #$02240024, (a1)
move.l #$02440020, (a1)
move.w #$0040, (a1)
move.l #$58000000, (a0) ; Load graphics
lea (@Gfx_Arrows), a2
moveq #12-1, d7
@LoadGfx:
move.l (a2)+, (a1)
move.l (a2)+, (a1)
move.l (a2)+, (a1)
move.l (a2)+, (a1)
move.l (a2)+, (a1)
move.l (a2)+, (a1)
move.l (a2)+, (a1)
move.l (a2)+, (a1)
dbf d7, @LoadGfx
move.l #$44880003, (a0) ; Write left arrow
move.l #$00C000C1, (a1)
move.l #$45080003, (a0)
move.l #$00C200C3, (a1)
move.l #$44C40003, (a0) ; Write right arrow
move.l #$28C128C0, (a1)
move.l #$45440003, (a0)
move.l #$28C328C2, (a1)
moveq #2, d0 ; Write title
moveq #1, d1
move.w #$8000, d2
lea (@Str_Title1), a0
bsr WriteString
addq.w #2, d1
move.w #$E000, d2
lea (@Str_Title2), a0
bsr WriteString
moveq #20-(24/2), d0 ; Write instructions
moveq #23, d1
lea (@Str_Instr1), a0
bsr WriteString
moveq #20-(18/2), d0
addq.w #2, d1
lea (@Str_Instr2), a0
bsr WriteString
bsr DrawBG ; Draw background
move.w #$8154, ($C00004) ; Enable display
bra MainMenu ; Go into the main menu
;****************************************************************************
@Gfx_Arrows:
dc.l $00000000, $00000000, $00000000, $00000000
dc.l $00000034, $00004343, $00343434, $43434343
dc.l $00000034, $00004343, $00343434, $43434343
dc.l $34343434, $43434343, $34343434, $43434343
dc.l $34343434, $00434343, $00003434, $00000043
dc.l $00000000, $00000000, $00000000, $00000000
dc.l $34343434, $43434343, $34343434, $43434343
dc.l $34343434, $00434343, $00003434, $00000043
@Gfx_BG:
dc.l $55555555, $55555555, $55555555, $55555555
dc.l $55555555, $55555555, $55555555, $55555555
dc.l $00000000, $00000000, $00000000, $00000000
dc.l $00000000, $00000000, $00000000, $00000000
dc.l $66666666, $66666666, $66666666, $66666666
dc.l $66666666, $66666666, $66666666, $66666666
dc.l $78787878, $87878787, $78787878, $87878787
dc.l $78787878, $87878787, $78787878, $87878787
dc.l $79797979, $97979797, $79797979, $97979797
dc.l $79797979, $97979797, $79797979, $97979797
dc.l $AAAAAAAA, $AAAAAAAA, $AAAAAAAA, $AAAAAAAA
dc.l $AAAAAAAA, $AAAAAAAA, $AAAAAAAA, $AAAAAAAA
dc.l $BABABABA, $ABABABAB, $BABABABA, $ABABABAB
dc.l $BABABABA, $ABABABAB, $BABABABA, $ABABABAB
dc.l $56565656, $65656565, $56565656, $65656565
dc.l $56565656, $65656565, $56565656, $65656565
; 123456789012345678901234567890123456
@Str_Title1: dc.b "Echo sound engine", 0
@Str_Title2: dc.b "Version 0.9 by Sik", 0
@Str_Instr1: dc.b "Use D-pad to select song", 0
@Str_Instr2: dc.b "A/C: play, B: stop", 0
even
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