This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
$00 Unknown, probably means that the RamFAST is very confused $01-08 DRAM memory test failure $09 EPROM checksum failure $0C Z180 processor crashed, indicates some hardware fault $0D Error writing cache data to disk $0E Termination power error
 
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