Duplicate nametables

This commit is contained in:
2026-02-19 13:07:55 -05:00
parent a85926d8d8
commit 4459bba6a7
2 changed files with 23 additions and 9 deletions

32
plat.s
View File

@@ -365,6 +365,8 @@ main:
adc #1
sta frame_counter
sta scroll_x
jsr controller
jsr movement
@@ -392,6 +394,8 @@ draw_player:
cmp #0
bne :+
lda player_pos_x
sec
sbc scroll_x
sta oam + (4 * 1) + 3
sta oam + (4 * 3) + 3
sec
@@ -401,6 +405,8 @@ draw_player:
jmp :++
:
lda player_pos_x
sec
sbc scroll_x
sta oam + (4 * 0) + 3
sta oam + (4 * 2) + 3
sec
@@ -753,8 +759,16 @@ setup_background:
dey
bne :--
lda #0
sta var_o
@nametable_start:
lda $2002
lda #$20
lda #$24
ldx var_o
cpx #1
bne :+
lda #$24
:
sta $2006
lda #$00
sta $2006
@@ -931,6 +945,14 @@ setup_background:
cpy #8
bne :--
ldx var_o
cpx #$20
bne :+
ldx #$24
stx var_o
jmp @nametable_start
:
rts
mul_x:
@@ -1072,8 +1094,6 @@ downward_collision_check:
sta var_n
@begin_check:
lda player_pos_x
clc
adc scroll_x
ldx var_n
cpx #0
bne :+
@@ -1143,8 +1163,6 @@ upward_collision_check:
sta var_n
@begin_check:
lda player_pos_x
clc
adc scroll_x
ldx var_n
cpx #0
bne :+
@@ -1215,8 +1233,6 @@ right_collision_check:
sta var_n
@begin_check:
lda player_pos_x
clc
adc scroll_x
; divide by 16
clc
adc #8
@@ -1286,8 +1302,6 @@ left_collision_check:
sta var_n
@begin_check:
lda player_pos_x
clc
adc scroll_x
; divide by 16
sec
sbc #8