Need help with snes asm Super Mario Kart

[xxphillips]

I've been working on a code to make the computer karts go as fast as you. A break down of the asm


$80/87E2 4C 00 93 JMP $9300 [$80:9300] A:2000 X:1700 Y:0004 P:envmxdiZc Jumps to free space
$80/9300 BD EF 00 LDA $00EF,x[$80:17EF] A:2000 X:1700 Y:0004 P:envmxdiZc load the computers break offset
$80/9303 C9 FF 00 CMP #$00FF A:00FF X:1700 Y:0004 P:envmxdizc compares computer break value 00 no ff yes
$80/9306 D0 0B BNE $0B [$9313] A:00FF X:1700 Y:0004 P:envmxdiZC if not breaking so value would be 00 jump to [$9313]
$80/9308 DA PHX A:00FF X:1700 Y:0004 P:envmxdiZC but if value is ff Push Index Register X
$80/9309 A2 00 10 LDX #$1000 A:00FF X:1700 Y:0004 P:envmxdiZC loads player ones offset into X
$80/930C BD D6 00 LDA $00D6,x[$80:10D6] A:00FF X:1000 Y:0004 P:envmxdizC loads player ones top speed into A
$80/930F FA PLX A:03B0 X:1000 Y:0004 P:envmxdizC pulls back computers offset to Index Register X
$80/9310 9D EA 00 STA $00EA,x[$80:17EA] A:03B0 X:1700 Y:0004 P:envmxdizC stores player ones tops speed to computer speed
$80/9313 BD EA 00 LDA $00EA,x[$80:17EA] A:03B0 X:1700 Y:0004 P:envmxdizC puts back high jacked code
$80/9316 4C E5 87 JMP $87E5 [$80:87E5] A:03B0 X:1700 Y:0004 P:envmxdizC jumps back to normal code

This part is where the problem is $80/9303 C9 FF 00 CMP #$00FF is there a way to make it only compare FF side of A but still work for all computers so not a Absolute address? the ram address for FF side is 7e17EF. So I don't want 00 side ram address 7E17f0 tobe Compared.

please help if you can.

[Pyriel]

Not much you said there makes sense. If you're saying you want to push the top speed of the player to all non-player carts, you'd have to loop through them and write each one individually within the loop.

I can't tell if "break" should be "brake", or if by "computers break" you mean 00 and FF are identifiers that indicate whether or not a particular cart is being managed by AI or a player (which would also explain the "side" part). Otherwise, you're going to have to explain what you mean by that. In assembly terms a "break" isn't something you're likely to be messing with, unless the SNES uses the concept in some sort of tricksy way. And I don't recall that it does.

[xxphillips]

sorry I mean brake/slow down I worked out a way of doing it now I will up load it in a day or so but I would like to know if anyone can come up with a different way or same way

8087E24C Jumps to free space
8087E300
8087E493
809300BD load the computers brake offset
809301EF
80930200
809303C9 compares computers brake value 00 no ff yes
809304FF
80930500
809306D0 if not braking so value would be 00 on FF side of A jump to [$9313] #$00FF
8093070B
809308DA but if value is FF Push Index Register X
809309A2 loads player ones offset into X
80930A00
80930B10
80930CBD loads player ones top speed into A
80930DD6
80930E00
80930FFA pulls back computers offset to Index Register X
8093109D stores player ones top speed to computer speed
809311EA
80931200
809313BD puts back high jacked code
809314EA
80931500
8093164C jumps back to normal code
809317E5
80931887

7e17EF is FF side of A 7e17F0 is for 00 side $80/9303 C9 FF 00 CMP #$00FF

7e17F0 address is for points of computer so when value is not zero code stops working I have found a way to make code work

I would like to see if there is another way

thank you for you reply Pyriel

[xxphillips]

Sorry Pyriel I didn't reply fully to your reply you don't have to do each computer individually within the loop because the base address
8087E2 is for all computers the X value is different. If you setup a breakpoint on 8087E2 and keep pressing run it will go through all computers offsets in X

[Pyriel]

Oh, so what you're hooking into is already part of iterating the AI drivers. I don't know what your question ever was then.

[xxphillips]

The code has a problem at this part $80/9303 C9 FF 00 CMP #$00FF 00=7e17F0 FF=7e17EF
the 00 ram address 7e17F0 is the computers points so after a race if the computer gets a point code stops working because the value is Not Equal to zero so my question was if any body was able to come up with away to make the value be equel if the computers have points. I've worked out away how todo it now and will up load code tomorrow but I wanted to see if there was another way to fix this. let me know if it's still not clear
thanks for your reply

[Pyriel]

Oh. You're asking how to only compare the 8-bits you're interested in. Load it to an accumulator, then AND it with 0x00FF or whatever mask you need to screen out the values that are interfering.

[xxphillips]

I had the same idea that's how I fixed the code thanks for your reply

8087E24C Jump to free space 809300
8087E300
8087E493
809300BD load computers brake address
809301EF
80930200
80930329 And 00ff so value in 00 address wont matter
809304FF
80930500
809306C9 Compares computers brake value 00 no ff yes
809307FF
80930800
809309D0 if not braking so value would be 00 on FF side of A jump to [$9316]
80930A0B
80930BDA but if value is FF Push Index Register X
80930CA2 loads player ones offset into X
80930D00
80930E10
80930FBD loads player ones top speed into A
809310D6
80931100
809312FA pulls back computers offset to Index Register X
8093139D stores player ones top speed to computer speed
809314EA
80931500
809316BD puts back high jacked code
809317EA
80931800
8093194C jumps back to normal code
80931AE5
80931B87