IBM 5150 XT

From: Dave Dameron <>
Date: Mon Jul 5 17:13:22 1999

At 10:39 PM 7/5/99 +0100, you wrote:
>[CGA and MDA cards/monitors]
>Now consider the 5151 MDA monitor. The is no equivalent of 'Q402'. The
>incoming horizontal sync signal goes straight to the driver stage. So the
>horizontal system will run at whatever frequency you try to drive it at.
>Even if that results in major blow-ups.
Does that mean if one is turned on without a connection to any computer,
there will be no CRT anode voltage (The horizontal output transistor has no
drive and is off)?
Received on Mon Jul 05 1999 - 17:13:22 BST

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