Q-Bus 18-Bit to 22-Bit wirewrap?

From: Megan <mbg_at_world.std.com>
Date: Mon Aug 10 14:20:33 1998

Please pardon if this has already been answered... I've been away for
a week at the Worldcon (world science fiction convention)

>I have a really compact "PDP-11/23S" chassis that has an 18-bit Q-Bus
>backplane (4xQuad) in it. Although the circuitry for the Q-Bus is on
>traces of a PC card, there are also wirewrap pins extending out from
>the backplane. Am I naive to assume that I can convert this to a
>22-bit Q-Bus by wirewrapping four or so lines? Any pointers on how to
>do this or on technique?

Not naive at all... I've done it on at least one of my H9270 backplanes
at home... I know of many others who have as well. If I remember
correctly, you need to buss the BC-BF lines (and for Q-Q backplanes,
DC-DF), but I would have to verify this...

                                        Megan Gentry
                                        Former RT-11 Developer

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Received on Mon Aug 10 1998 - 14:20:33 BST

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