IBM R30 Operator's Manual page 214

DTR Register Test
CTR Register Test
Miscellaneous Registers Test
This test checks accessibility to the MC68230 chip and its internal registers. It is made up of
two sub-tests which don't access the h/w a 1 connectedty te MC682. Allss tht cheedTR
est
Operioners.
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Operator Guide
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This test writes, reads and compares a 1 among 0 bits in DTR
registers.
This test writes, reads and compares a 1 among 0 bits in CTR
registers. It saves and restores the CTR register value.
This test writes, reads and compares a 1 among 0 bits is thPGCCTR
.st