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minor documentation corrections/clarifications

This commit is contained in:
Michael Miceli 2024-10-24 23:56:12 -04:00
parent ecbfb52d02
commit 2c430cdde2
4 changed files with 5 additions and 5 deletions
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2
docs/Game Completion Modifier.md
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@ -2,7 +2,7 @@
_Contra_ is already a challenging game. However, it gets even more difficult _Contra_ is already a challenging game. However, it gets even more difficult
the more times you beat the game. This documents the ways in which beating the the more times you beat the game. This documents the ways in which beating the
game affects the behavior of subsequent playthoughs. game affects the behavior of subsequent playthroughs.
The game keeps track of the number of times the player(s) beat the game in the The game keeps track of the number of times the player(s) beat the game in the
variable `GAME_COMPLETION_COUNT`, located at CPU memory address `$31`. variable `GAME_COMPLETION_COUNT`, located at CPU memory address `$31`.

4
docs/Graphics Documentation.md
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@ -347,8 +347,8 @@ article on this. These specifics are also outlined below.
When the first byte of the sprite code is #$fe, the sprite is a "small" sprite. When the first byte of the sprite code is #$fe, the sprite is a "small" sprite.
Small sprites are composed of #$3 bytes, including the #$fe byte. Small sprites Small sprites are composed of #$3 bytes, including the #$fe byte. Small sprites
always have their X position set to #$fc (-4) and their Y position set to #$f8 always have their X position shifted left by #$04 and their Y position shifted
(-8). up byte #$08.
* Byte 0 is #$fe and signifies the sprite is a small sprite * Byte 0 is #$fe and signifies the sprite is a small sprite
* Byte 1 specifies the tile number * Byte 1 specifies the tile number

2
src/bank1.asm
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@ -4179,7 +4179,7 @@ load_sprite_to_cpu_mem:
; the second byte is the pattern table tile, and the third byte is the sprite attributes ; the second byte is the pattern table tile, and the third byte is the sprite attributes
; the X position is set to #$fc (-4 decimal) and the Y position is set to #$f8 (-8 decimal) from SPRITE_Y_POS. ; the X position is set to #$fc (-4 decimal) and the Y position is set to #$f8 (-8 decimal) from SPRITE_Y_POS.
@load_small_sprite: @load_small_sprite:
ldx $04 ; load sprite y position ldx $04 ; load OAM write offset
lda #$f8 ; a = -#$08 lda #$f8 ; a = -#$08
clc ; clear carry in preparation for addition clc ; clear carry in preparation for addition
adc $01 ; subtract #$08 from y position adc $01 ; subtract #$08 from y position

2
src/ram.asm
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@ -268,7 +268,7 @@ CURRENT_LEVEL:
GAME_COMPLETION_COUNT: GAME_COMPLETION_COUNT:
.res 1 .res 1
; $32 -P1 number of lives, #$00 is last life, on game over stays #$00 ; $32 - P1 number of lives, #$00 is last life, on game over stays #$00
; but P1_GAME_OVER_STATUS becomes #$01 ; but P1_GAME_OVER_STATUS becomes #$01
P1_NUM_LIVES: P1_NUM_LIVES:
.res 1 .res 1