Supervisor (Privileged) Instructions
MOTOROLA M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL 6-75
PTEST Get Information About Logical Address PTEST
(MC68851)
Gate (G)—If the tested address is found in the address translation cache, set to the
value of the G-bit in the address translation cache. If the tested address is found in
the translation table, set if the G-bit of the page descriptor is set; cleared otherwise.
Globally Shared (C)—Set if the address is globally shared; cleared otherwise.
Level Number (N)—Set to the number of levels searched. A value of zero indicates an
early termination of the table search in the root pointer (DT = page descriptor) if
the level specification was not zero. If the level specification was zero, N is always
set to zero.
Instruction Format:
1514131211109876543210
1111000000
EFFECTIVE ADDRESS
MODE REGISTER
1 0 0 LEVEL R/ W A-REGISTER FC
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