User’s Manual
C166S V1 SubSystem
Central Processing Unit
User’s Manual
3-57
V 1.6, 2001-08
3.6.2.2
DPP Override Mechanism in the C166S
The C166S provides an override mechanism to temporarily bypass the DPP addressing
scheme.
The EXTP(R) and EXTS(R) instructions override this addressing mechanism. Instruction
EXTP(R) replaces the contents of the DPP register, while instruction EXTS(R)
concatenates the complete 16-bit long address with the specified segment base
address. The overriding page or segment may be specified directly as a constant (#pag,
#seg) or via a word GPR (Rw).
Figure 3-10
Overriding the DPP Mechanism
0
15
14 13
16-bit Long Address
#pag
14-bit page offset
24-bit Physical Address
0
15
16-bit Long Address
#seg
16-bit segment offset
24-bit Physical Address
EXTP(R):
EXTS(R):
Содержание C166S V1 SubSystem
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Страница 16: ...User s Manual C166S V1 SubSystem Introduction User s Manual 1 6 V 1 6 2001 08...
Страница 126: ...User s Manual C166S V1 SubSystem Central Processing Unit User s Manual 3 96 V 1 6 2001 08...
Страница 178: ...User s Manual C166S V1 SubSystem Memory Organization User s Manual 4 52 V 1 6 2001 08...
Страница 206: ...User s Manual C166S V1 SubSystem Instruction Set User s Manual 5 28 V 1 6 2001 08...
Страница 306: ...User s Manual C166S V1 SubSystem Detailed Instruction Set User s Manual 6 100 V 1 6 2001 08...
Страница 362: ...User s Manual C166S V1 SubSystem The External Bus Interface User s Manual 8 40 V 1 6 2001 08...
Страница 452: ...User s Manual C166S V1 SubSystem General Purpose Timer Unit User s Manual 12 44 V 1 6 2001 08...
Страница 454: ...User s Manual C166S V1 SubSystem Instruction Index User s Manual 13 2 V 1 6 2001 08...
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