I bought another E40 off eBay. Hopefully I'll be able to flash it with the A4 GTO OS. (Its out of a Malibu, but has the correct part# 12596679)
I read the GTO T42 I have as well. Then loaded the image into IDA and set the processor as 68030 (I don't have a 68332 option). I've just finished changing everything that looks like code into code. It looks reasonable:
Code:
ROM:00009774 ; ¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦ S U B R O U T I N E ¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦
ROM:00009774
ROM:00009774
ROM:00009774 sub_9774: ; CODE XREF: ROM:loc_94B2p
ROM:00009774 movea.l #$FFB840,a0 ; Prepare to transmit SeedKey (Note TCM id's itself as an engine controller? $10)
ROM:0000977A move.b #7,(a0)
ROM:0000977E move.b #$6C,1(a0) ; 'l'
ROM:00009784 move.b #$F0,2(a0)
ROM:0000978A move.b #$10,3(a0)
ROM:00009790 move.b #$67,4(a0) ; 'g'
ROM:00009796 move.b #1,5(a0)
ROM:0000979C clr.b 6(a0)
ROM:000097A0 clr.b 7(a0)
ROM:000097A4 jsr nullsub_2
ROM:000097AA rts
ROM:000097AA ; End of function sub_9774
ROM:000097AA
I'm not going to spend too much time reversing it. But at least I have it now in case I want to poke around later.
-Mike