DIY PROMDo It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.
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Originally posted by ryan.h Okay, new question... I have the code I need.
Code:
ldaa #0x00 ;select channel 00
jsr LF642 ;DO MUX READ
staa L01DE ;store value in stack
I picked the memory location as above...
An ALDL address that was pointing to a redundant TPS A/D raw count will be changed to this stack value. (Who needs TPS% AND TPS raw?) Now, changing that address using the patch method is simple enough. BUT, when you have new code like above, that you need to add to the program loop....
How do you do it? I'm guessing I have to disassemble the whole binary, stick that in the main loop, and assemble it. I HOPE that's not the case, because I have had extreme difficulty just disassembling the stupid binary.
The point of the patch is so that you can just overwrite the stock code with what you have in the binary without any extra work. Your simply just grafting your stuff over the stock binary in the bin. Use the ORG command to set where the commands are to go, assemble, and add it in to the stock bin.
Also be very careful where you put stuff. 99.9% of the stock addresses are in use and needed by the stock code. The raw TPS may be the actual TPS value thats stored from the A/D read. In that case, most, if not all other TPS values may be based off it.
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Last edited by dimented24x7; 02-12-2006 at 09:13 PM.
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Yes, I was referring to changing the ALDL datastream output byte from the (redundant) TPS address to my new value's address. I wouldn't be changing any actual TPS values.
