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2kgteclass · 09/04/2007, 08:08 PM

does anyone know what mode the H/8 operates in on the eclipse ecu?

I know it is a maximum mode. Im almost positive it is mode 7 judging by the size of the rom. If someone has a high res closeup of the board, and specifically the area immediately around the CPU I might be able to see what mode its installed in. This is a serious issue as if the chip is permanently installed in mode 7, it would not be flashable. There might be an IC designed to trigger PROM mode hooked up to the MDx pins. Im working on an all software emulator so we can better trace through the disassembled machine code. The emulator will be able to simulate operation of the rom execution all the way through, then by tracing to the pins of the ECU through the board we can see what subroutines produce output at which pins, if possible I would like to make it so the emulator could simulate the other components on the ECU's board right down to the pins on the connectors. If anyone has any h8 ecus laying around that they could donate to the cause, having one that my car doesnt depend on would definitely help this situation as I could test it directly.

09/04/2007, 08:08 PM	#14 (permalink)
2kgteclass mumbles the madman Join Date: Mar 2007 Location: RHODE ISLAND Vehicle: 2000 Eclipse GT Posts: 229	does anyone know what mode the H/8 operates in on the eclipse ecu? I know it is a maximum mode. Im almost positive it is mode 7 judging by the size of the rom. If someone has a high res closeup of the board, and specifically the area immediately around the CPU I might be able to see what mode its installed in. This is a serious issue as if the chip is permanently installed in mode 7, it would not be flashable. There might be an IC designed to trigger PROM mode hooked up to the MDx pins. Im working on an all software emulator so we can better trace through the disassembled machine code. The emulator will be able to simulate operation of the rom execution all the way through, then by tracing to the pins of the ECU through the board we can see what subroutines produce output at which pins, if possible I would like to make it so the emulator could simulate the other components on the ECU's board right down to the pins on the connectors. If anyone has any h8 ecus laying around that they could donate to the cause, having one that my car doesnt depend on would definitely help this situation as I could test it directly. Last edited by 2kgteclass; 09/04/2007 at 08:34 PM. Reason: Ask for a labrat.