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- (c) Copyright 1992 Commodore-Amiga, Inc. All rights reserved.
- The information contained herein is subject to change without notice,
- and is provided "as is" without warranty of any kind, either expressed
- or implied. The entire risk as to the use of this information is
- assumed by the user.
-
-
- Video Adapter Diagrams
-
-
- by Adam Levin-Delson
-
-
- All Amigas have a video connector which supplies RGB output in both
- analog and digital formats. This allows the Amiga to use many
- different types of monitors. Besides this standard Amiga video
- connector, the A3000 (and A3000T) have a ``Video Display Enhancer''
- (VDE) connector which supplies an analog RGB signal at up to twice the
- bandwidth of the standard Amiga port.
-
- Commodore sells a number of monitors which have cables that allow you
- to connect them to the Amiga. Other manufacturers sell monitors that
- will work with an Amiga, but many of these monitors are not
- pin-compatible with the Amiga. This can be remedied by buying or
- building an adapter which either reconfigures the wiring or adds the
- necessary circuitry between the computer and monitor. This article
- contains the wiring diagrams for those adapters.
-
-
- Warning
-
- Though these instructions are fairly simple, if not done properly, it
- is possible to damage both your computer and your video monitor, so
- Commodore does not recommend that you build these yourself. If you are
- not proficient with the tools, parts, or procedures involved in making
- these adapters, you should purchase them in completed form (Commodore
- part numbers are provided later). This information is provided for
- your convenience and is expressly subject to the disclaimer and
- warnings found at the beginning of this publication.
-
-
- Construction Tips
-
- Keep wires as short as possible to limit interference.
-
- Female 23-pin connectors can be kludged from female 25-pin connectors
- with a little patience and a little hacksaw. Male 23-pin connectors
- can be kludged from male 25-pin connectors by pulling a couple of pins.
-
- Radio Shack's D-sub hoods (part numbers 276-15xx) make ideal adapter
- housings, especially where additional circuitry is required.
-
-
- 15-Pin Male D-Sub to 9 Pin Female D-Sub Analog Adapter
-
- This adapter connects the A3000's VDE connector to a 15/31kHz
- analog-RGB monitor with a 9-pin connector. Commodore does not
- currently offer this adapter.
-
- Alternatively, reverse the gender of both ends to connect a 15-pin,
- multi-scan analog-RGB monitor to a computer's 9-pin analog-RGB
- connector (non-Amiga). This adapter is available from Commodore as
- part #390683-01.
-
-
- 23-Pin Female D-Sub to 15 Pin Female D-Sub Analog Adapter
-
- This adapter connects the Amiga's standard RGB connector to a 15/31kHz
- analog-RGB monitor with a 15-pin connector.
-
- This adapter is available from Commodore as part #390682-01.
-
- A1-A14 are pins 1-14 of a 74HCT08 (dual-input AND gate) IC chip. C1 is
- a .01uf 50V ceramic capacitor.
-
-
- 23-Pin Female D-Sub to 9 Pin Female D-Sub Analog Adapter
-
- This adapter connects the Amiga's standard RGB connector to a 15kHz
- analog-RGB monitor with a 9-pin connector.
-
- A1-A14 are pins 1-14 of a 74HCT08 (dual-input AND gate) IC chip. C1 is
- a .01uf 50V ceramic capacitor.
-
-
- 23-Pin Female D-Sub to 9 Pin Female D-Sub Digital Adapter
-
- This adapter connects the Amiga's standard RGB connector to a 15kHz
- digital-RGB video monitor with a 9-pin connector.
-
- A1-A14 are pins 1-14 of a 74LS04 (hex inverter) IC chip. B1-B14 are
- pins 1-14 of another 74LS04 IC chip. C1 is a .1uf 16V ceramic
- capacitor.
-