Instruction manual

In either case, the line continues for the number of iterations speciﬁed in

the LineLength ﬁeld of BRES3; and the data for the line is taken from the

low order 16 bits of the input data. At the end of the line, the potential next

pixel address for the line is saved and the LineLength is reset to 0. A write

operation to the BCONT register continues this line for 16 more iterations.

6.4.2 Planemask Register

The planemask register dictates which bits in each pixel are going to be written

during a write or read/modify/write operation. In 8 or 16 bits/pixel modes,

software must replicate the planemask across the 32 bits of the planemask

Note

Value at initialization: 0

The register’s format and contents are:

0031

MR−0087−93RAGS

PLANEMASK

6–12 CXTurbo Graphics Subsystem: 300/500 Models