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change naming convention for one variable

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hugova 2025-05-11 22:32:36 +02:00
parent c2e89a5487
commit 2bab2a6c8a
2 changed files with 12 additions and 9 deletions
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9
wip-hugo/routines/text/char.inc
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@ -11,9 +11,12 @@
;; 16-bit value, we reuse bytes from Y_pos
Y_pos_offset_hi = $EC
Y_pos_offset_lo = Y_pos
;; 16-bit value, we reuse bytes from code
petski_position_lo = code
petski_position_hi = code + 1 # this clobers the ARGVEK space ik but it's faster. CURSED AF
;; What you will see bellow is .. interesting. I want to reuse
;; code and I need it for a 16-bit pointer. Because 6502 pointers expect the bytes to be besides each other
;; I need to use code +1 to store data even though its fot ARGVEK.
;; Thats why it's cursed
petski_position = code ; 16 bit value uses (code +1)
;; values
VIC_bank = $4000

12
wip-hugo/routines/text/char_draw.s
View file

@ -19,7 +19,7 @@
initial:
;We first need to clear some memory
LDA #$00
STA petski_position_hi
STA petski_position + 1
STA Y_pos_offset_hi
STA X_pos_offset_hi
@ -27,10 +27,10 @@ initial:
;; This is code *8 because 8byte is one character
;; *8 = 2*2*2
ASL code ;Will never owerflow, therefore 8byte
Mult_16 petski_position_lo, petski_position_hi
Mult_16 petski_position_lo, petski_position_hi
Mult_16 petski_position, petski_position + 1
Mult_16 petski_position, petski_position + 1
;; Add starting position
Add_16 petski_position_lo, petski_position_hi, #<Character_generator_ROM , #>Character_generator_ROM, !
Add_16 petski_position, petski_position + 1, #<Character_generator_ROM , #>Character_generator_ROM, !
;;Calculate screen_position to use
Mov_16 screen_position, screen_position + 1, #<VIC_bank, #>VIC_bank
@ -64,11 +64,11 @@ initial:
;; One character is 8 byte, move these bytes to screen
LDY #$07
@loop:
LDA (petski_position_lo), Y
LDA (petski_position), Y
STA (screen_position), Y
DEY
BNE @loop
LDA (petski_position_lo), Y
LDA (petski_position), Y
STA (screen_position), Y
RTS
.endproc