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 <<O>>  Difference Topic 5128XRAM (r1.1 - 27 Feb 2004 - Home.synoptic)
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%META:TOPICINFO{author="synoptic" date="1077904420" format="1.0" version="1.1"}% 5128 XRAM explanation :

The 5128 chip present in OBD0 ECUs is a 2K byte(?) SRAM chip. It is mapped into memory space at 1XXX hex - any external communication(MOVX A,@DPTR) with 1000 <= DPTR < 2000h will address the SRAM chip.

see OBD0 PM6 PM7 RAM_Locations for some documentation on what is stored in XRAM.


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