🚀 go-pugleaf

On 11 Mar 1997, Georg Schwarz wrote:

#I'm trying to piece together a working computer from some electronic junk.
#I have a 1991 AMI BIOS board with an AMD 386DX40 and 4 MB RAM. I have
#connected the board to the power supply of an ancient IBM PC.
#Now I tried to add a graphics card. I've tried two different ones, both
#of them 8 bit cards:
#
#the first one is from a Tandom 286, the second one from an IBM PC (8086).
#Both have the same two row DSUB (I think that's what they are called)
#plug (similar to VGA's three row plug). I have a monitor (yellow
#monochrome picture) which has the correct cable. When I first powered
#on with either of the cards I got two messages. The first one said the
#usunal stuff that I had to reconfigure in the BIOS (and in fact the
#computer automatically went on to the BIOS afterwards), the second one
#said "DISPLAY SWITCH NOT PROPER <F1>". What does that second message
#mean?
#The first card was recognized by the BIOS as an EGA/VGA card, the second
#one as a MONOCHROME card. After saving that BIOS setup the first message
#in both cases was gone, while the second one remained. Apart from that
#message, everything seems to work though (I haven't tried anything but
#text mode).
#
#Needless to say I don't have any documentation. Both graphics cards don't
#seem to have any jumpers.
#
#What is the source of that message? How can I make it go away? Does it
#indicate some memory address or IRQ conflict?
#
#Any hints are welcome. Thanks.
#--=20
#Georg Schwarz (schwarz@physik.tu-berlin.de, kuroi@cs.tu-berlin.de, PGP 2.6=
ui)
#Institut f=FCr Theoretische Physik  +49 30 314-24254   FAX -21130  IRC kur=
oi
#Technische Universit=E4t Berlin            http://home.pages.de/~schwarz/
#

Check for a jumper near the keyboard controller. Have it open for
monochrome cards,closed for all other cards.

Gary Tait , VE3VBF