The Macintosh Quadra 700 and 900 built-in video supports the Apple 21-inch
color and monochrome monitors to 8-bit, 256 colors only. Adding VRAM
beyond 1MB to the Macintosh Quadras when using these monitors is not
beneficial; to achieve greater pixel depth on the 21-inch color monitor,
you'll need a third-party video NuBus card.
A 19-inch monitor that matches the characteristics of other monitors the
Macintosh Quadra supports may work; however, none of the other monitors
are specifically 19-inch monitors.
The following chart should help explain the video expansion options
available on the Macintosh Quadras today. Note that this information
should supersede any information you have received thus far.
The following chart lists the Macintosh Quadra 700 and 900 internal
video's maximum pixel depths supported, depending upon the VRAM
configuration:
Display size 512K VRAM 1MB VRAM 2MB VRAM
------------ --------- -------- --------
12-inch landscape
384 x 512, such as 12-inch RGB 8 bpp 24 bpp 24 bpp
12-inch Monochrome
640 x 480 8 bpp 8 bpp 8 bpp
13-inch RGB and VGA
480 x 640 8 bpp 8 bpp 24 bpp
Super VGA
800 x 600 8 bpp 8 bpp 24 bpp
15-inch Portrait (b/w)
640 x 870 4 bpp 8 bpp 8 bpp
16-inch Color
832 x 624 8 bpp 8 bpp 24 bpp
2-Page Display (b/w)
870 x 1152 4 bpp 8 bpp 8 bpp
21-inch Color
870 x 1152 4 bpp 8 bpp 8 bpp
PAL with convolution n.a. 8 bpp 8 bpp
PAL without convolution 8 bpp 8 bpp 24 bpp*
NTSC with convolution n.a 8 bpp 8 bpp
NTSC without convolution 8 bpp 8 bpp 24 bpp
* Note: there are two ways to wire a video cable for connecting a PAL
monitor to a Macintosh Quadra; only by using the proper extended sense
code are you able to achieve 24 bits per pixel. For details, search
under "Quadra" and "video sense pinouts".
Note that 512K of VRAM is the minimum configuration for the Macintosh
Quadra 700; it is 1MB of VRAM for the Macintosh Quadra 900.