IBM PC - Hardware - Adapters - 1504910

Color/Graphics Monitor Adapter (1504910)

 

Also known as:        Color Graphics Adapter, CGA

Item number:          1504910

Announcement date:    1981-08-12
Availability date:    1981-08-12
Announcement letter:  281-65  THE IBM PERSONAL COMPUTER


From the announcement:

       Provides for the attachment of a television frequency display
to the IBM Personal Computer. Either a "direct-drive RGB" signal or a
"composite" video signal can be selected. The display can be a
monitor or, through a customer-suplied RF modulator, a standard TV
set. Either a color or black and white monitor or TV can be attached.
Sixteen foreground and 8 background colors are supported in text
(character) mode. This attachment also provides support for
four-color medium resolution graphics (320 dots horizontal, 200 dots
vertical) and black and white high-resolution graphics (640 dots
horizontal, 200 vertical). 256 characters are available in "text"
mode, 128 in medium or high resolution graphics. The adapter provides
16KB of built-in memory to store multiple display screen contents and
supports a customer-supplied light pen. The adapter should be plugged
into the second system expansion slot on the left as viewed from the
front of the System Unit.


Note on the adapter bracket black color:

It looks like the adapters made for the original IBM PC had black brackets, 
to match the color on the back side of the system unit.


Page created: 2021-08-12   Page last updated: 2023-10-02