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Controllererror messagesresult from failure in either hardwareor
software. Somecontrollererrormessagesoccurduringstartuptests.
The messagesmean that the controlleris malfunctioning, b ut is still
able to displaythe error message. Certain conditionscan also be
detectedduringcontrollerreset,oninsertionof a cartridge, a ndatother
timesafterthecompletion ofpower-upinitialization. Anerrorstopsthe
test sequence, the unit goes off line, and the alarm sounds. The
controllerwill attemptto recover,if possible. If the problemis not
foundduringinitialization, b utrecursduringoperation,mostlikelythe
faultis in the hardware.
MESSAGE
MEANING
RESULT
CALL SERVICE 05
CRC
error in controller program halts; fatal
main ROM program
CALLSERVICE06
CRC error in resident
program halts; fatal
font ROM
CALLSERVICE07
read/write test error in program hatts; fatal
on-board RAM
CALL SERVICE 08
read/write test error in program halts; fatal
expansion RAM (if
present)
CARTRIDGE1 BAD
CRC error in Cartridge sequence stops; alarm
1 (if present)
beeps; shut off power and
fii problem; or depress
[ERROR SKIP] to
continue, in which case
C@ridge 1 is ignored
CARTRIDGE 2 BAD
CRC error in Cartridge sequence stops; alarm
2 (if present)
beeps; shut off power and
fix problem; or depress
[ERROR SKIP] to con-
tinue, in which case
Cartridge 2 is ignored
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