Code:
@convert to thumb
add r2,pc,#1
bx r2
.thumb
mov r12,lr
@[Text to Item] = r5
ldr r1, text
bl TextToItem
mov r4,r5
bl TextToItem
@[Item Address] = r2
mov r0,#0
ldr r3,CheckLocation
ldrb r3,[r3]
cmp r3,#5
bgt End
sub r3,#1
ldr r2,HouseRoom
ldrb r1,[r1]
cmp r1,#0x2B
bne BottomLevel
mov r1,#0x20
lsl r1,#4
add r2,r1
BottomLevel:
mov r1,#0x45
lsl r1,#4
mul r1,r3
add r2,r1
mov r1,#0xFF
cmp r3,#0
bge maploop
Outdoors:
ldr r2, Map
lsl r1,#0x4
add r1,#0xF
maploop:
ldrh r3, [r2]
cmp r3, r5
bne notreplace
cmp r4,#0
beq Move
sub r4,#1
notreplace:
add r0,#1 @add 1 to the number of times we looped
add r2, #0x2 @add 2 to the map address, thus going to the next spot
sub r1, #0x1 @subtract 1 from r5, this is howmany times the loop repeats
bpl maploop
b End
@[Calculations..]
Move:
ldr r3,CheckLocation
ldrb r3,[r3]
mov r1,#0x10
lsl r1,#8
cmp r3,#0
bne Stuff
mov r1,#0x21
lsl r1,#0xC @r1 X coordinate
Stuff:
mov r5,r1 @r5 y coordinate
mov r2,r0
mov r3,#0x20
lsl r3,#8
mov r4,#2
lsl r4,#7
mov r0,#0
@[Box Number] = r4
@Remainder (r2) holds slot number
Div1:
cmp r2,r4
blt Add1
sub r2,r4
add r0,#1
b Div1
Add1:
mov r4,r0
mov r0,#0
@[Row number] = r0
Div2:
cmp r4,#4
blt Next
sub r4,#4
add r0,#1
b Div2
Next:
@r0 holds row number
@r4 holds box number
@r2 holds slot number
mul r0,r3
lsl r0, #4
add r5,r0
mul r4,r3
lsl r4,#4
add r1,r4
mov r0,#0
Div3:
cmp r2,#16
blt Finish
sub r2,#16
add r0,#1
b Div3
Finish:
mul r0,r3
add r5,r0
mul r2,r3
add r1,r2
ldr r0,Pointer
ldr r0,[r0]
mov r2, #0xA9
lsl r2, #3
sub r0,r2
str r1,[r0]
str r5,[r0,#8]
End:
mov lr,r12
bx lr
TextToItem:
mov r0,#0xC
add r1, #0x1
mov r5,#0x0
mov r2,#0xF
@[[Final text address in r5]]
loop:
ldrb r3,[r1]
add r1,#1
cmp r3,#0x20
bgt skipthis
sub r1,#1
lsr r5,r0
lsr r5,#4
b exit
skipthis:
cmp r3,#0x40
blt skip
sub r3,#0x7
skip:
and r3,r2
lsl r3,r0
add r5,r3
sub r0,#0x4
bpl loop
exit:
bx lr
.arm
Map:
.long 0x21E3124
HouseRoom:
.long 0x21E5328
text:
.long 0x22AF135
Pointer:
.long 0x21C6DEC
CheckLocation:
.long 0x21EED6C
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