@DATABASE AmigaMail
@NODE MAIN "XIII-1: Video Adapter Diagrams"
@TOC "Table_of_Contents/XIII"
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 " link XIII-1-1}
@{" Construction Tips " link XIII-1-2}
@{" 15-Pin Male D-Sub to 9 Pin Female D-Sub Analog Adapter " link XIII-1-3}
@{" 23-Pin Female D-Sub to 15 Pin Female D-Sub Analog Adapter " link XIII-1-4}
@{" 23-Pin Female D-Sub to 9 Pin Female D-Sub Analog Adapter " link XIII-1-5}
@{" 23-Pin Female D-Sub to 9 Pin Female D-Sub Digital Adapter " link XIII-1-6}

@ENDNODE

@NODE XIII-1-1 "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.

@ENDNODE

@NODE XIII-1-2 "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.

@ENDNODE

@NODE XIII-1-3 "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.

  @{" 15-Pin Male to 9 Pin Female Analog Diagram " link "XIII-1/15PM29PFAnalog.ilbm/MAIN"}

@ENDNODE

@NODE XIII-1-4 "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.

  @{" 23-Pin Female to 15 Pin Female Analog Diagram " link "XIII-1/23PF15PFAnalog.ilbm/MAIN"}

A1-A14 are pins 1-14 of a 74HCT08 (dual-input AND gate) IC chip.  C1 is
a .01uf 50V ceramic capacitor.

@ENDNODE

@NODE XIII-1-5 "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.

  @{" 23-Pin Female to 9 Pin Female Analog Diagram " link "XIII-1/23PF29PFAnalog.ilbm/MAIN"}

A1-A14 are pins 1-14 of a 74HCT08 (dual-input AND gate) IC chip. C1 is
a .01uf 50V ceramic capacitor.

@ENDNODE

@NODE XIII-1-6 "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.

  @{" 23-Pin Female to 9 Pin Female Digital Diagram " link "XIII-1/23PF29PFDigital.ilbm/MAIN"}

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.

@ENDNODE
