Re: Help needed with Apple IIgs monitor

[dempson@actrix.gen.nz (David Empson)]

Scrounge Weasel <piracy@microsoft.com> wrote:

> DB15 is what IIgs and Mac used for video connectors.  HD15 is an IBM VGA
> connector.  They both have 15 pins, but the HD15 is packed with a higher
> density than the DB15.
>  _______________     _______________
> \o o o o o o o o/   \   o o o o o   /
>  \o o o o o o o/     \ o o o o o   /
>   -------------       \ o o o o o /
>                        -----------
>       DB15                 HD15

The one on the left is a "DA15", not a "DB15".  The letter after the "D"
refers to the physical size of the connector.

Assuming two rows of pins with the usual spacing and staggered
arrangement, the common connectors defined by the relevant DIN standard
are:

DA15 (Mac/IIgs/IIc video connector, AUI port for Ethernet, PC joystick)
DB25 (serial or parallel port, Mac/A2 SCSI port)
DE9 (IIe/IIc/IIgs joystick, IIc/IIe/Mac mouse, PC serial port)

There are also DC and DD prefixes, which are for larger connectors which
I haven't come across in the realm of personal computers.  I forget the
exact number of pins, but one of them is about 37 pins in two rows, and
the other is about 50 pins in three rows (with the same pin spacing as
the others, so the connector is taller).

The 19 pin connector used for the floppy drive on the IIe/IIc/IIgs/Mac
is one which falls outside the originally designated types, so it
doesn't have an official second letter.  I use "D-19".


The VGA connector could be called a "DE15", as it is the same physical
size as a DE9 but has 15 pins with tighter spacing.  "HD15" is probably
a better choice, though it might be confused with other high density
connectors.