This page will help you identify the Targa+ and includes descriptions
of the switch settings and connector pin-outs.
You will need to know the settings of Switch 1 positions 1-3 so that
you can match to the selected Base I/O address in VPCONFIG.
Switch 1 (SW1):
Controls the I/O Base address and the I/O Mode.
Defaults: UP, DOWN, UP, UP, UP.
For VidPlus, switch positions 4 & 5 must remain UP.
Switch positions 1-3 select the Base I/O address:
I/O Base 1 2 3
-------- --- --- ---
0x200 U U U
0x210 U U D
0x220 U D U (default)
0x230 U D D (recommended)
0x240 D U U
0x250 D U D
0x260 D D U
0x270 D D D
I do not recommend using the 0x220 address because this
is more recently the default address of many sound cards.
Even if you have no sound card in your system, I recommend
using 0x230.
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Switch 2 (SW2):
Controls output video selection.
Default: DOWN = H/V Sync.
This selects H/V Sync or S-Video out. Due to the
limited number of pins on the output connector, both
H/V Sync and S-Video are not available simultaneously.
Move the switch to the UP position if you are going
to connect any S-Video equipment to the Targa+ output.
Some boards have an SW2 switch that has (3) positions:
UP, CENTER and DOWN. Be sure the switch is either UP
or DOWN, the CENTER position disables all output.
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Switch 3 (SW3):
Controls special interrupts to the Host computer.
Defaults: DOWN, DOWN, DOWN, DOWN, DOWN = interrupts OFF.
For VidPlus, all switch positions must remain DOWN.
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Video Connector Pin-Outs:
INPUT:
Pin # Description
----- -----------
1 Ground
2 Ground
3 Red
4 Green
5 Blue
6 Composite Video
7 Composite Sync
8 Y (S-Video)
9 C (S-Video)
OUTPUT:
Pin # Description
----- -----------
1 Ground
2 Ground
3 Red
4 Green
5 Blue
6 Composite Video
7 Composite Sync
8 Y (S-Video) or H Sync (H/V Sync)
9 C (S-Video) or V Sync (H/V Sync)
