Tiles rendering

move

@@ -0,0 +1,2 @@
+#!/bin/bash
+cp *.nes /Volumes/USB\ DRIVE/

plat.s

@@ -327,10 +327,10 @@ gamepad_poll:
 .segment "RODATA"
 
 level:
-.byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-.byte 0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0
-.byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-.byte 0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0
+.byte 0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1
+.byte 0,1,0,0,1,0,0,0,0,0,0,0,1,1,1,1
+.byte 0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1
+.byte 0,1,0,0,1,0,0,0,0,0,0,0,1,1,1,1
 .byte 0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0
 .byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
 .byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
@@ -343,6 +343,10 @@ level:
 .byte 0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0
 .byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
 
+metatiles:
+.byte 0,0,0,0,0
+.byte 3,4,5,6,1
+
 example_palette:
 .byte $0F,$00,$3D,$20 ; greyscale
 .byte $0F,$09,$1A,$16 ; grass
@@ -371,6 +375,8 @@ var_n:    .res 1
 var_o:    .res 1
 var_p:    .res 1
 
+jump_pressed_last_frame: .res 1
+
 frame_counter: .res 1
 
 .segment "CODE"
@@ -488,12 +494,21 @@ movement:
     @end:
 
     ; Jump
-    jsr btn_up
+    jsr btn_a
     cmp #0
-    beq :+
-        lda #250
-        sta vel_y
-    :
+    beq @fail_jump ; If jump not pressed, forget it
+    lda jump_pressed_last_frame
+    cmp #1
+    beq @fail_jump ; If jump last frame, forget it
+
+    ; Jump newly pressed this frame
+    lda #250
+    sta vel_y
+
+    @fail_jump:
+    
+    jsr btn_a
+    sta jump_pressed_last_frame
 
 
     ; Gravity
@@ -522,6 +537,16 @@ movement:
         sta oam+0
     :
 
+    ; Bonk
+    lda #8
+    cmp oam+0
+    bcc :+
+        lda #0
+        sta vel_y
+        lda #8
+        sta oam+0
+    :
+
     ; Apply X velocity
     lda oam+3
     clc
@@ -549,6 +574,107 @@ update_background:
     rts
 
 setup_background:
+	lda $2002 ; reset latch
+	lda #$20
+	sta $2006
+	lda #$00
+	sta $2006
+	; empty nametable
+	lda #0
+	ldy #30 ; 30 rows
+	:
+		ldx #32 ; 32 columns
+		:
+			sta $2007
+			dex
+			bne :-
+		dey
+		bne :--
+
+    lda $2002
+    lda #$20
+    sta $2006
+    lda #$00
+    sta $2006
+	ldy #0
+	@row_start:
+        ldx #0
+        :
+            txa
+            pha
+
+            ; index is (Y * 16) + X
+            stx temp_x
+            lda #16
+            jsr mul_y
+            clc
+            adc temp_x
+            tax
+
+            lda level, X
+            ldx #5
+            jsr mul_x
+            tax
+            
+            lda metatiles+0, X
+            sta $2007
+            lda metatiles+1, X
+            sta $2007
+
+            pla
+            tax
+            inx
+            cpx #16
+            bne :-
+
+        ; again
+        ldx #0
+        :
+            txa
+            pha
+
+            ; index is (Y * 16) + X
+            stx temp_x
+            lda #16
+            jsr mul_y
+            clc
+            adc temp_x
+            tax
+
+            lda level, X
+            ldx #5
+            jsr mul_x
+            tax
+
+            lda metatiles+2, X
+            sta $2007
+            lda metatiles+3, X
+            sta $2007
+
+            pla
+            tax
+            inx
+            cpx #16
+            bne :-
+		iny
+        cpy #15
+		bne @row_start
+
+
+	; clear attributes
+    lda #0
+	ldx #64 ; 64 bytes
+	:
+        lda #%11100100
+
+		sta $2007
+		dex
+		bne :-
+
+    rts
+
+
+
 	lda $2002 ; reset latch
 	lda #$20
 	sta $2006
@@ -587,19 +713,6 @@ setup_background:
 
 
 
-    lda $2002
-    lda $20
-    sta $2006
-    lda $00
-    sta $2006
-	ldy #0
-	:
-        lda level, Y
-        lda #4
-        sta $2007
-		iny
-        cpy #240
-		bne :-
 
 
 	; fill in an area in the middle with 1/2 checkerboard
@@ -661,23 +774,55 @@ setup_background:
 	rts
 
 mul_x:
+    cmp #0
+    beq @zero
+    cpx #0
+    beq @zero
+
     sta temp_mul
+
+    txa
+    pha
     lda #0
     :
         clc
         adc temp_mul
         dex
         bne :-
+    sta temp_mul
+    pla
+    tax
+    lda temp_mul
+    rts
+
+    @zero:
+    lda #0
     rts
 
 mul_y:
+    cmp #0
+    beq @zero
+    cpy #0
+    beq @zero
+
     sta temp_mul
+
+    tya
+    pha
     lda #0
     :
         clc
         adc temp_mul
         dey
         bne :-
+    sta temp_mul
+    pla
+    tay
+    lda temp_mul
+    rts
+
+    @zero:
+    lda #0
     rts
 
 controller: