Technical data

VGA54XX - Video Diagnostics Tests
http://www.motorola.com/computer/literature 3-133
3
BLT - Bit Blitter
Command Input
PPCx-Diag>vga543x blt
Description
This test verifies that the Bit BLT of the Cirrus Logic CL-54XX chip is
functioning correctly by invoking a blitter operation to copy a block of data
from system memory to video DRAM, then invoking a blitter operation to
copy the block from one area in video DRAM to another and then finally
a blitter operation to copy the block of data back into system memory. The
contents of the original block of system memory are compared to that of
the destination block. The test fails if the block which was blittered does
not match the original block.
Response/Messages
After the command has been issued, the following line is printed:
VGA54xx BLT: Cirrus vga54xx BitBLT........Running ->
If all parts of the test are completed correctly, then the test passes:
VGA54xx BLT: Cirrus vga54xx BitBLT...Running -> PASSED
If any part of the test fails, then the display appears as follows:
VGA54xx BLT: Cirrus vga54xx BitBLT ..Running -> FAILED
VGA54xx/BLT Test Failure Data:
Memory compare error in BitBLT test
Source byte at 0x ______,is 0x __ .
Destination byte at 0x ______,is 0x __ .