Grass Valley Imagestore 750 v.2.0.1 - Manual (Page 242)

Graphics Co-Processor Imagestore 750 User Manual
Page 242 Miranda Technologies Inc.
Imagestore 750 has four keying layers. The Intuition has up to 16 (virtual)
keying layers. The Imagestore keying layer parameter in the Imagestore
automation command protocol is represented by a single ASCII character in
hexadecimal:
0x0 DSK1
0x1 DSK2
0x2 DSK3
0x3 DSK4
The character range has been extended from 0x0 to 0xF to address more than
four keying layers. This means that automation vendors can now support the
greater number of keying layers on offer.
If Intuition is being controlled directly via automation then the full 16 layers
are available. If it is connected and controlled via an Imagestore then only 12
layers are available.
For example, if an Imagestore 750 receives a command to load a graphic into
layer 0x4, it will forward this command onto the Intuition to load the graphic
into the first Intuition keying layer. To do this the Imagestore 750 subtracts 4
from the layer value before relaying the command. Note that layer 0 in the
intuition is the first layer. To illustrate this further:
Imagestore Layer Number Intuition Layer Number
0x0 (DSK1)
0x1 (DSK2)
0x2 (DSK3)
0x3 (DSK4)
0x4 0x0
0x5 0x1
0x6 0x2
0x7 0x3
0x8 0x4
0x9 0x5
0xA 0x6