20 Mar
2007
20 Mar
'07
12:08 a.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org
[mailto:cctalk-bounces at classiccmp.org] On Behalf Of Jay West
Sent: dinsdag 20 maart 2007 1:38
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: 11/45 works, but....
Brad wrote....
Taking a wild guess ... have you an AM radio near the 11/45?
Could it be that the RX02 when it is on generates a lot of
noise? I am thinking of worn brushes on the spindle motor, but
I am not sure that motor has carbon brushes ...
- Henk.
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Thank you for your co-operation.
Is the rx02 controller a dma device? I'm
probably wrong
but I don't
think I've put it in slots where the NPR was
removed.
RX11 (RX01, M7846) is programmed I/O. RX211 (RX02, M8256) can
use DMA via non processor request. So... NPR jumper needs to
be removed for my M8256.
I checked tonight, and powering them both up (RL02 & RX02)
before the cpu makes no difference. If the RX02 is powered on
when the load button is hit on the RL02, the RL02 will fault
just after spinup. If the RX02 is powered off, the RL02
doesn't fault at any time and runs just fine.
My M8256 is set at address 177170, vector 264, priority BR5.
The M7762 is set at address 174400, vector 160, priority BR5.
I'm assuming both at BR5 isn't a problem?
Jay