H8 ECUs
1998 DSM
Production Dates -> 7/97-5/98
FWD Ecu Part # -> MD346675
FWD ROM Id -> EM2055
AWD Ecu Part # -> MD346676
AWD ROM Id -> EM2056
PCB Code: JE331B156C
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1999 DSM
Production Dates -> 6/98-4/99
FWD Ecu Part # -> MD359402
FWD ROM Id -> EM2363
AWD Ecu Part # -> MD359403
AWD ROM Id -> EM2364
PCB Code: JE331B156D
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Pictures
1999 DSM ECU Front PCB
1999 DSM ECU Rear PCB
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Notes
All DSM Turbo Ecus are compatible Flash wise.
A 98 ROM can be Flashed to a 99 Ecu, and vice versa.
Also a GST ROM can be Flashed to a GSX ECU, and vise versa.
98-99 Spyder Ecus are compatible Flash wise.
The only hardware difference with the Spyder Ecus, is the Fuel Pump Pin.
The Spyders output +5v to turn on the Fuel Pump Module.
While the DSM pull +12v to ground to turn on the Fuel Pump Relay.
Testing so far has revealed that all Ecus with the same PCB Code are compatible, Flash wise.
The Evo5/6 are not compatible(different PCB Code), and Flashing an Evo image to a DSM Ecu will brick it.
(Don’t ask how I know)
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PCB Code Database
(Unless noted CPU is MH7202F)