Vax 613 0S Manuel d'instructions Page 57

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Vue de la page 56
Table 10 (Cont.) TURBOchannel Control and Status Registers (400/500/600/700
/800/900) Models
Start
Address
End
Address Size Register Access
Discussed
In
Dense space
1.C280.0000 1.C281.FFFF 128
KB
Scatter/gather map
1
R Chapter 5
1.C280.0000 1.C281.FFFF 128
KB
Interrupt mask register
1
W Section 3.3.6
1.C281.FFFC 1.C281.FFFF 4 B Interrupt mask register
(by convention)
1
W Section 3.3.6
1.C282.0000 1.C3FF.FFFF Reserved
1.C2A0.0000 1.C2A0.0003 4 B TC reset register W Section 3.3.9
1.C2A0.0004 1.C2BF.FFFF Reserved
Sparse space
1.D480.0000 1.D480.0003 4 B Interrupt register R Section 3.3.7
1.D4C0.0000 1.D4C0.0003 4 B Interrupt register RC Section 3.3.7
1.D500.0000 1.D503.FFFF 256
KB
Scatter/gather map
1
R/W Chapter 5
1
Writing dense space 1.C280.0000 to 1.2C81.FFFF modifies the interrupt mask register; by
convention, 1.C281.FFFC is used as the address of the interrupt mask register. Writing to the
corresponding sparse space 1.D500.0000 to 1.D503.FFFF modifies the scatter/gather map. Reading
either space reads the scatter/gather map.
TURBOchannel I/O Registers 3–9
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