mirror of https://github.com/deater/tb1.git
snes: display rudimentary level 1
also fix some issues with opening and fading and title screen zsnes hides a multitude of sins
This commit is contained in:
Vince Weaver
parent
355b4cc539
commit
4bba2a0fd5
|
|
@ -1,2 +1,2 @@
|
|||
.word $6b94 ; Complement of checksum
|
||||
.word $946b ; Unsigned 16-bit sum of ROM
|
||||
.word $3d2c ; Complement of checksum
|
||||
.word $c2d3 ; Unsigned 16-bit sum of ROM
|
||||
|
|
|
|||
|
|
@ -11,9 +11,9 @@ ball_x = $0000
|
|||
|
||||
level_1:
|
||||
|
||||
rep #$20 ; mem/A = 16 bit
|
||||
sep #$20 ; mem/A = 8 bit
|
||||
.a8
|
||||
rep #$10 ; X/Y = 16 bit
|
||||
.a16
|
||||
.i16
|
||||
|
||||
|
||||
|
|
@ -21,21 +21,75 @@ level_1:
|
|||
; Setup VBLANK routine
|
||||
;==========================
|
||||
|
||||
sei ; disable interrupts
|
||||
; sei ; disable interrupts
|
||||
|
||||
lda #level1_vblank
|
||||
sta vblank_vector
|
||||
; lda #level1_vblank
|
||||
; sta vblank_vector
|
||||
|
||||
cli ; enable interrupts
|
||||
; cli ; enable interrupts
|
||||
|
||||
sep #$20 ; mem/A = 8 bit
|
||||
.a8
|
||||
|
||||
|
||||
;==========================
|
||||
; Setup Background
|
||||
;==========================
|
||||
|
||||
; we want the BG1 Tilemap to start at VRAM $e000
|
||||
; Format is
|
||||
; aaaa aass a is shifted by 10 for address
|
||||
; ss = size of screen in tiles 00 = 32x32
|
||||
;
|
||||
; 0111 0000
|
||||
|
||||
lda #$70 ; BG1 Tilemap starts at VRAM $e000/2
|
||||
sta $2107 ; bg1 src
|
||||
|
||||
; aaaa bbbb a= BG2 tiles, b= BG1 tiles
|
||||
; bbbb<<13
|
||||
; 0000 0000
|
||||
; our BG1 tiles are stored starting in VRAM $0000
|
||||
|
||||
lda #$02
|
||||
sta $210b ; bg1 tile data starts at VRAM 4000/2
|
||||
|
||||
|
||||
;===============================
|
||||
; Load Level1 Background Palette
|
||||
;===============================
|
||||
stz $2121 ; start with color 0
|
||||
ldy #(16*2) ; we have 16 colors
|
||||
lda #^level1_background_palette
|
||||
ldx #.LOWORD(level1_background_palette)
|
||||
jsr svmw_load_palette
|
||||
|
||||
;======================
|
||||
; Load Level1 Tile Data
|
||||
;======================
|
||||
ldx #$2000 ;
|
||||
stx $2116 ; set adddress for VRAM read/write
|
||||
; multiply by 2, so 0x4000
|
||||
|
||||
lda #^level1_background_tile_data
|
||||
ldx #.LOWORD(level1_background_tile_data)
|
||||
ldy #1824 ; Copy 57 tiles, which are 32 bytes each
|
||||
; 8x8 tile with 4bpp
|
||||
; (57*32) = 1824 = ????
|
||||
|
||||
jsr svmw_load_vram
|
||||
|
||||
;===================================
|
||||
; Load Level1 Tile Map
|
||||
;===================================
|
||||
ldx #$7000 ;
|
||||
stx $2116 ; set adddress for VRAM read/write
|
||||
; multiply by 2, so 0xe000
|
||||
|
||||
lda #^level1_background_tilemap
|
||||
ldx #.LOWORD(level1_background_tilemap)
|
||||
ldy #$0700 ; 32x28 = 896 * 2 = 0x700
|
||||
jsr svmw_load_vram
|
||||
|
||||
|
||||
|
||||
;==========================
|
||||
; Setup Sprite
|
||||
|
|
@ -45,68 +99,29 @@ level_1:
|
|||
|
||||
; Sprite Palettes start at color 128
|
||||
|
||||
lda #128
|
||||
sta $2121 ; Start at START color
|
||||
lda #^level1_pal0_palette ; Using ^ before the parameter gets its bank.
|
||||
lda #128 ; start with color 128
|
||||
sta $2121 ;
|
||||
ldy #(16*2) ; we have 16 colors
|
||||
lda #^level1_pal0_palette
|
||||
ldx #.LOWORD(level1_pal0_palette)
|
||||
ldy #(16 * 2) ; 2 bytes for every color
|
||||
|
||||
; In: A:X -- points to the data
|
||||
; Y -- Size of data
|
||||
|
||||
pha
|
||||
phx
|
||||
phb
|
||||
php ; Preserve Registers
|
||||
|
||||
sep #$20
|
||||
.a8
|
||||
stx $4302 ; Store data offset into DMA source offset
|
||||
sta $4304 ; Store data bank into DMA source bank
|
||||
sty $4305 ; Store size of data block
|
||||
|
||||
stz $4300 ; Set DMA Mode (byte, normal increment)
|
||||
lda #$22 ; Set destination register ($2122 - CGRAM Write)
|
||||
sta $4301
|
||||
lda #$01 ; Initiate DMA transfer
|
||||
sta $420B
|
||||
|
||||
plp ; Restore registers
|
||||
plb
|
||||
plx
|
||||
pla
|
||||
jsr svmw_load_palette
|
||||
|
||||
;=========================
|
||||
; Load sprite data to VRAM
|
||||
;=========================
|
||||
|
||||
lda #$80 ; increment after writing $2119
|
||||
sta $2115
|
||||
ldx #$0000 ; DEST
|
||||
stx $2116 ; $2116: Word address for accessing VRAM.
|
||||
lda #^level1_pal0_data ; SRCBANK
|
||||
ldx #.LOWORD(level1_pal0_data) ; SRCOFFSET
|
||||
ldy #$0800 ; SIZE
|
||||
; 32 bytes * 64 tiles
|
||||
|
||||
; In: A:X -- points to the data
|
||||
; Y -- Number of bytes to copy (0 to 65535) (assumes 16-bit index)
|
||||
ldx #$0000 ;
|
||||
stx $2116 ; set adddress for VRAM read/write
|
||||
; multiply by 2, so 0x0000
|
||||
|
||||
phb
|
||||
php ; Preserve Registers
|
||||
lda #^level1_pal0_data
|
||||
ldx #.LOWORD(level1_pal0_data)
|
||||
ldy #$0800 ; 32 bytes * 64 tiles
|
||||
|
||||
sep #$20
|
||||
.a8
|
||||
stx $4302 ; Store Data offset into DMA source offset
|
||||
sta $4304 ; Store data Bank into DMA source bank
|
||||
sty $4305 ; Store size of data block
|
||||
|
||||
lda #$01
|
||||
sta $4300 ; Set DMA mode (word, normal increment)
|
||||
lda #$18 ; Set the destination register (VRAM write register)
|
||||
sta $4301
|
||||
lda #$01 ; Initiate DMA transfer (channel 1)
|
||||
sta $420b
|
||||
|
||||
plp ; restore registers
|
||||
plb
|
||||
jsr svmw_load_vram
|
||||
|
||||
;
|
||||
; Init sprites to be offscreen
|
||||
|
|
@ -118,9 +133,10 @@ level_1:
|
|||
|
||||
sep #$20 ; mem/A = 8 bit
|
||||
.a8
|
||||
stz $0000 ; set sprite 0 X to 0
|
||||
lda #104
|
||||
sta $0000 ; set sprite 0 X to 0
|
||||
|
||||
lda #100 ; set sprite 0 Y to 100
|
||||
lda #192 ; set sprite 0 Y to 100
|
||||
sta $0001
|
||||
|
||||
; Xxxxxxxxx yyyyyyy cccccccc vhoopppN
|
||||
|
|
@ -151,15 +167,26 @@ level_1:
|
|||
jsr svmw_transfer_sprite
|
||||
|
||||
|
||||
SetupVideo:
|
||||
rep #$10
|
||||
sep #$20
|
||||
;======================
|
||||
; Setup the Video Modes
|
||||
;======================
|
||||
level1_setup_video:
|
||||
|
||||
lda #%00010001 ; Enable BG1 and sprites
|
||||
sta $212C
|
||||
stz $212d
|
||||
sep #$20 ; mem/A = 8 bit
|
||||
.a8
|
||||
rep #$10 ; X/Y = 16 bit
|
||||
.i16
|
||||
|
||||
lda #$0F
|
||||
lda #$01 ; 8x8 tiles, Mode 1
|
||||
sta $2105
|
||||
|
||||
lda #$11 ; Enable BG1 and sprites
|
||||
; lda #$01 ; Enable BG1
|
||||
sta $212c
|
||||
|
||||
stz $212d ; disable subscreen
|
||||
|
||||
lda #$0f
|
||||
sta $2100 ; Turn on screen, full Brightness
|
||||
|
||||
|
||||
|
|
@ -288,8 +315,8 @@ done_vblank:
|
|||
.segment "HIGHROM"
|
||||
|
||||
; sprite data
|
||||
.include "level1_pal0.sprites"
|
||||
|
||||
.include "level1_pal0.sprites"
|
||||
.include "level1_background.tiles"
|
||||
|
||||
.segment "BSS"
|
||||
x_direction: .word 0
|
||||
|
|
|
|||
|
|
@ -167,13 +167,17 @@ opening_setup_video:
|
|||
lda #$03
|
||||
sta $2105 ; set Mode 3
|
||||
|
||||
lda #$81 ; Enable NMI (VBlank Interrupt) and joypads
|
||||
; lda #$01 ; enable joypad
|
||||
sta $4200 ;
|
||||
|
||||
|
||||
jsr svmw_fade_in
|
||||
|
||||
|
||||
; lda #$81 ; Enable NMI (VBlank Interrupt) and joypads
|
||||
lda #$01 ; enable joypad
|
||||
sta $4200 ;
|
||||
|
||||
;forever:
|
||||
; bra forever
|
||||
|
||||
|
||||
opening_joypad_read:
|
||||
|
|
|
|||
|
|
@ -43,7 +43,10 @@ start_program:
|
|||
|
||||
jsr display_title
|
||||
|
||||
; jsr level_1
|
||||
jsr level_1
|
||||
|
||||
vblank_nop:
|
||||
rti
|
||||
|
||||
.include "title_screen.s"
|
||||
.include "opening.s"
|
||||
|
|
@ -76,7 +79,7 @@ wram_fill_byte:
|
|||
.word $0000 ; Native:BRK
|
||||
.word $0000 ; Native:ABORT
|
||||
vblank_vector:
|
||||
.word $0000 ; Native:NMI
|
||||
.word vblank_nop ; Native:NMI
|
||||
.word $0000 ;
|
||||
.word $0000 ; Native:IRQ
|
||||
|
||||
|
|
|
|||
|
|
@ -29,12 +29,11 @@ display_title:
|
|||
; aaaa aass a is shifted by 10 for address
|
||||
; ss = size of screen in tiles 00 = 32x32
|
||||
;
|
||||
; 1111 0000
|
||||
; 0111 0000
|
||||
|
||||
lda #$f0 ; BG1 Tilemap starts at VRAM $F000
|
||||
lda #$70 ; BG1 Tilemap starts at VRAM $e000/2
|
||||
sta $2107 ; bg1 src
|
||||
|
||||
|
||||
; aaaa bbbb a= BG2 tiles, b= BG1 tiles
|
||||
; bbbb<<13
|
||||
; 0000 0000
|
||||
|
|
@ -86,20 +85,6 @@ display_title:
|
|||
|
||||
title_setup_video:
|
||||
|
||||
sep #$20 ; set accumulator to 8 bit
|
||||
; as we only want to do an 8-bit load
|
||||
.a8
|
||||
.i16
|
||||
|
||||
; 000abcde
|
||||
; a = object, b=BG4 c=BG3 d=BG2 e=BG1
|
||||
lda #%00000001 ; Enable BG1
|
||||
|
||||
sta $212c
|
||||
|
||||
; disable subscreen
|
||||
stz $212d
|
||||
|
||||
; abcd efff
|
||||
; abcd = 8 (0) or 16 width for BG1234
|
||||
; e = priority for BG3
|
||||
|
|
@ -107,6 +92,16 @@ title_setup_video:
|
|||
lda #$03
|
||||
sta $2105 ; set Mode 3
|
||||
|
||||
|
||||
; 000abcde
|
||||
; a = object, b=BG4 c=BG3 d=BG2 e=BG1
|
||||
lda #$01 ; Enable BG1
|
||||
sta $212c
|
||||
|
||||
; disable subscreen
|
||||
stz $212d
|
||||
|
||||
|
||||
; a000 bbbb
|
||||
; a = screen on/off (0=on), ffff = brightness
|
||||
|
||||
|
|
@ -115,36 +110,33 @@ title_setup_video:
|
|||
|
||||
|
||||
; lda #$81 ; Enable NMI (VBlank Interrupt) and joypads
|
||||
; lda #$01 ; Enable joypad
|
||||
lda #$00
|
||||
lda #$01 ; Enable joypad
|
||||
; lda #$00
|
||||
sta $4200 ;
|
||||
|
||||
big:
|
||||
bra big
|
||||
;big:
|
||||
; bra big
|
||||
|
||||
;title_joypad_read:
|
||||
; lda $4212 ; get joypad status
|
||||
; and #%00000001 ; if joy is not ready
|
||||
; bne title_joypad_read ; wait
|
||||
;
|
||||
; lda $4219 ; read joypad (BYSTudlr)
|
||||
;
|
||||
; and #%11110000 ; see if a button pressed
|
||||
title_joypad_read:
|
||||
lda $4212 ; get joypad status
|
||||
and #%00000001 ; if joy is not ready
|
||||
bne title_joypad_read ; wait
|
||||
|
||||
; beq title_joypad_read
|
||||
;
|
||||
; lda #$80
|
||||
; sta $2100 ; Turn off screen
|
||||
lda $4219 ; read joypad (BYSTudlr)
|
||||
|
||||
; rts
|
||||
and #%11110000 ; see if a button pressed
|
||||
|
||||
beq title_joypad_read
|
||||
|
||||
lda #$80
|
||||
sta $2100 ; Turn off screen
|
||||
|
||||
rts
|
||||
|
||||
|
||||
;============================================================================
|
||||
|
||||
.segment "HIGHROM"
|
||||
|
||||
;tb_font:
|
||||
;.include "tbfont.inc"
|
||||
|
||||
.include "tb1_title.tiles"
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue