[comp.sys.ibm.pc.hardware] Help: Two monitors with ATI EGA Wonder & Hercules cards?

sonny@charybdis.harris-atd.com (Bob Davis) (01/19/91)

	ATI EGA Wonder card documentation gives switch settings for
the card to allow the Wonder card to peacefully coexist with an
"MDA" card. Is this also suitable for use with a Hercules mono card?
	I assumed so and set this up in my 286 machine. All seemed to
function fine. DOS MODE command seemed to toggle appropriately
between cards. MODE MONO went to the Hercules card. MODE CO80 switched
back to the EGA Wonder card (on which I had set switches to indicate a
TTL mono monitor being used). I simply plugged my mono monitor into the
selected card, and it seemed to work.
	THEN, while on the EGA card, I ran a program using Hercules
graphics WITHOUT first issuing the MODE MONO command to switch to Hercules
card. 
	Well, I fried my IBM monochrome monitor...the display went dark...
the smell of burnt windings arose from somewhere within its bowels...
Dismay arose from somewhere deep within mine...

	What am I likely to have done wrong? What is likely to have
been zapped in the monitor? Am I likely to be able to repair it?

	Thanks for any help (And for reading this far).
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