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Title: Memory addr 480000 Post by: rajivc666 on January 13, 2012, 12:24:48 AM THe following subroutine is taken from a stock SJ box. The section in BOLD seems to be writing to memory location 48003Eh (120h*4000h+3Eh).
Which is that memory location, or what am I doing wrong. Thanks ; =============== S U B R O U T I N E ======================================= seg010:728DC seg010:728DC seg010:728DC sub_8728DC: ; CODE XREF: seg010:22AD6P seg010:728DC ; seg010:22D50P seg010:728DC movb rl4, word_FDCC seg010:728E0 mov r10, #3Eh ; '>' seg010:728E4 mov r11, #120h seg010:728E8 extp r11, #1 seg010:728EA movb [r10], rl4 seg010:728EC mov r4, #42h ; 'B' seg010:728F0 mov r5, #120h seg010:728F4 extp r5, #1 seg010:728F6 movb rl3, [r4] seg010:728F8 movbz r4, rl3 seg010:728FA mov word_FDD8, r4 seg010:728FE movb rl4, word_FDCE seg010:72902 mov r10, #44h ; 'D' seg010:72906 mov r11, #120h seg010:7290A extp r11, #1 seg010:7290C movb [r10], rl4 seg010:7290E mov r4, #48h ; 'H' seg010:72912 mov r5, #120h seg010:72916 extp r5, #1 seg010:72918 movb rl3, [r4] seg010:7291A movbz r4, rl3 seg010:7291C mov word_FDDA, r4 seg010:72920 rets seg010:72920 ; End of function sub_8728DC Title: Re: Memory addr 480000 Post by: setzi62 on January 13, 2012, 09:51:17 AM You aren't doing anything wrong.
The cpu accesses the CC650 via memory mapped I/O at 0x480000 - 0x48007F for 1MB ME7.5 (or 0x400000 - 0x40007F for 512kB ME7.5). The CC650 is mainly the knock-signal evaluation IC and it has also digital I/O and ADC's on it. I think there is no information about the CC650 around, but the knock signal part is similar to the CC195, for which some information can be found. Title: Re: Memory addr 480000 Post by: rajivc666 on January 15, 2012, 10:24:07 AM Thank you Setzi. I am trying to learn how to switch the boost map with the cruise control switch. My plan is to convert the boost map into a 3D map and use the Y-axis as the selector of each map. (y =1 is map1, y=2 is map2....). And control the value of Y with the cruise control set button when cruise control is off. Long way to go.. :-[
Title: Re: Memory addr 480000 Post by: gremlin on January 15, 2012, 01:48:30 PM Thank you Setzi. I am trying to learn how to switch the boost map with the cruise control switch. Long way to go.. :-[ If you want to short this long way it's much easier (IMHO) to use free ADC-channel input present on pins of ME7.5 connector as control point. Adding some wires and 1 poti or rotary switch is not to high extra price for simplicity of software patches. Also that will be useful for cars without CCS. Title: Re: Memory addr 480000 Post by: rajivc666 on January 17, 2012, 09:45:06 AM I had this passion for assembly coding as a teenager. Just trying to rekindle it in this project. ;D
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