Toshiba M40 - Manual (Page 117)

3.8 Video 3 Diagnostic Programs
EQUIUM M40/M45/Satellite M40/M45 Maintenance Manual
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Subtest 11 BitBlt Engine Test
This test item is to check whether the BitBlt engine works normally.
BitBlt is the abbreviation of ‘Bit Block Translate’, that means the copy of data
block for 3 types, from video memory to video memory, from video memory to
system memory, and from system memory to video memory.
What should be done is to write the data of the type of BitBLT operation and the
location of BitBLT source area and destination area into the BitBLT registers, and
all those operations will be completed automatically by BitBLT engine with
minimum CPU intervention.