AIPS HELP file for ROAM in 31DEC18
As of Sun Apr 22 10:03:26 2018
Type: A form of TV display operation
Use: When an image is too large to fit in one TV memory plane, it is
possible to load portions of the image into more than one TV
memory. Then, one may view any contiguous Nx x Ny portion of
the image, where Nx and Ny depend on the model of TV, both 512
for IIS Model 70 and both 1024 for the IVAS. As coded, during
a "roam" operation, you may use the trackball position
interactively to set which portion of the image is viewed. In
addition, each use of buttons B will increment the
magnification. Use of button C will decrement the
magnification. Button D causes the roam operation to cease,
but leaves the viewed image undisturbed. Button A causes you
to enter a familiar black-and-white transfer function
enhancement of all channels in the roam. While in that mode,
button C reverses the slope of the transfer and buttons A, B,
and D return you to roaming.
How: The TV screen is "split" into portions vertically and/or
horizontally. In each portion only one image plane is visible.
Suitable control of the split point, the scrolls of the images,
and the zoom allow the program to perform the roam. NOTE: many
other TV functions are designed to work only on a single image
and will not work normally on the split-screen image. These
include TVLOD, TVLABEL, TVZOOM, TVFIDDLE, TVSCROLL, TVWINDOW,
TVLABEL, TVBLINK, and slice plotting. Verbs such as IMPOS,
TVNAME, TVPSEUDO, and OFMGET will work.
TVROAM....Load image to TV channels, then roam
REROAM....Roam using previous channel spatial configuration
ROAMOFF...Captures current visible screen as simple screen
image (not in roam mode).
ROMODE....Specify number frames in x and y as 100 * Mx + My.