6545 = 6845 ???

From: Ruud Baltissen (g.j.p.a.a.baltissen_at_kader.hobby.nl)
Date: 1999-04-20 20:18:09

Hallo allemaal,

Until yesterday I was sure that a 6545 was the MOS-version of the 6845.
This was confirmed by someone who repaired his 8032 with a 6845.

Yesterday I tried to repair an 8032 with video problems. So I started 
with replacing the 6545 with a 6845. Before I had at least some 
video, now none at all. So I tried three original Motorola 6845s with 
a good 8032: same problem. But using the 46505/68B45 from Hitachi 
worked out allright. To make it even more confusing, the three 
Motorolas and the Hitachis work allright on a CGA or MGA card. 

Has anyone an idea of the confusing behaviour of the original 6845 
versus the Hitachi 68B45 ???

Groetjes, Ruud

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