...because we can't all be on the bleeding edge...





TURBO PGA

ORCHID TECHNOLOGY

TURBO PGA

Category

Video

Video Types Supported

CGA

Video Processor

Unidentified

Highest Resolution Supported

720 x 350

Data Bus Type

16-bit ISA

Memory Type

Unidentified

Maximum Onboard Memory

Unidentified

CONNECTIONS

Purpose

Location

15-pin analog video connector

CN1

ON BOARD ROM SELECT

Setting

W1

On board ROM enabled

Open

On board ROM disabled

Closed

DUAL PORTED RAM SELECT

Setting

W2

Dual-ported RAM enabled

Pins 2 & 3 closed

Dual ported RAM disabled

Pins 1 & 2 closed

8-bit RAM Transfers enabled

All open

Note:If the mother board clock is 6hz then enable the dual ported RAM. If the clock is higher than 6hz and failure occurs disable the Dual ported RAM. If you have other boards at address 0C000h or 0D000h then remove the W2 jumper this will force 8-bit transfers.

VIDEO SYNC SELECT

Setting

W7

W8

IBM CGA

Pins 1 & 2 closed

Pins 1 & 2 closed

IBM/Hercules monochome

Pins 1 & 2 closed

Pins 2 & 3 closed

Hsync positive

Pins 1 & 2 closed

N/A

Hsync negative

Pins 2 & 3 closed

N/A

Vsync positive

N/A

Pins 1 & 2 closed

Vsync negative

N/A

Pins 2 & 3 closed

Composite sync positive

Pins 1 & 2 closed

All open

Composite sync negative

Pins 2 & 3 closed

All open

SECONDARY VIDEO SELECT

Setting

W9

W10

W11

IBM CGA

Pins 3 & 4 closed

Pins 3 & 4 closed

Pins 3 & 4 closed

Monochrome

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2, 3 & 4 closed

FACTORY CONFIGURED SETTINGS

Jumper

Setting

W3

Closed

W4

Pins 2 & 3 closed

W5

Closed (Soldered)

W6

Closed (Soldered)

Note:The manufacturers documentation does not provide the locations of the jumpers W5 & W6. They do warn that removing the solder will cause failure of the board.