English Amiga Board - View Single Post

Pietro.tiberi · 16 November 2019, 22:37

Ok thanks I understand so I'll try to do this test.
In the meanwhile i checked all connections of U500 (the ROM): all Data paths to CPU are ok (connectivity check with a multimeter D(

and A(

), ROM PIN31 is connected to 4.94 V, and pin10 is GROUND.

PIN 12 (_ROMEN) is connected to GARY PIN 21 and it is 4.94 (so HIGH). Do you know if _ROMEN should be active LOW or HIGH?

16 November 2019, 22:37	#28
Pietro.tiberi Registered User Join Date: Oct 2017 Location: Marino Posts: 42	Ok thanks I understand so I'll try to do this test. In the meanwhile i checked all connections of U500 (the ROM): all Data paths to CPU are ok (connectivity check with a multimeter D( and A(), ROM PIN31 is connected to 4.94 V, and pin10 is GROUND. PIN 12 (_ROMEN) is connected to GARY PIN 21 and it is 4.94 (so HIGH). Do you know if _ROMEN should be active LOW or HIGH?