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Memory Map and Interrupts
3-9
NCR89C105 SLAVIO Configuration Control
Bit 17
Reserved
Bit 16
E – Ethernet Interrupt
Bit 15
Bit S – Serial Port Interrupt (SLAVIO)
Bit 14
K – Keyboard/Mouse Interrupt
Bits 13:07
SBus IRQ (7:1)
Bits 06:00
Reserved
3.3
NCR89C105 SLAVIO Configuration Control
3.3.1
SLAVIO Configuration Register
The NCR89C105 has several software-programmable options which are
controlled by its configuration register. This register is located at
0x70180000.
A system reset clears all of the SLAVIO configuration bits to 0.
Field definitions:
Bits 7:5
Reserved - always read 0.
Bit 4
I - Modem Ring Interrupt Enable. When this bit is set to 1,
the modem RI interrupt generation is activated (see also Bit
1, and the description of the modem register). When this bit
is cleared, modem interrupts are not generated, regardless of
the state of the M bit (Bit 1) or the MSI_IRQ_input.
Bit 3
P - Power Fail Detect Enable. When this bit is set to 1, a low
on the PFD_input causes a module error (error 15) interrupt.
The interrupt is visible (and clearable) in AuxIO register 2.
When this bit is clear, the PFD_input is ignored.
Figure 3-3 The SLAVIO Configuration Register
Reserved
P
D
M
S
7
6
5
4
3
2
1
0
I
S3GX_TRMBook Page 9 Friday, September 19, 1997 11:39 am
Содержание SPARCbook 3 series
Страница 1: ...Series Technical Reference Manual 980327 02 3 S3GX_TRMBook Page i Friday September 19 1997 11 39 am...
Страница 8: ...viii S3GX_TRMBook Page viii Friday September 19 1997 11 39 am...
Страница 28: ...1 16 Architecture Overview Microcontroller Subsystem S3GX_TRMBook Page 16 Friday September 19 1997 11 39 am...
Страница 44: ...2 16 The SPARC CPU SBus Controller S3GX_TRMBook Page 16 Friday September 19 1997 11 39 am...
Страница 76: ...5 8 SCSI Controller DMA Support S3GX_TRMBook Page 8 Friday September 19 1997 11 39 am...
Страница 82: ...6 6 Ethernet Interface DMA Support for Network Operations S3GX_TRMBook Page 6 Friday September 19 1997 11 39 am...
Страница 96: ...7 14 PCMCIA Interface Microcontroller Registers S3GX_TRMBook Page 14 Friday September 19 1997 11 39 am...
Страница 146: ...9 28 MODEM Class 2 Fax Command Set S3GX_TRMBook Page 28 Friday September 19 1997 11 39 am...
Страница 180: ...11 30 Display Interface RAMDAC S3GX_TRMBook Page 30 Friday September 19 1997 11 39 am...
Страница 210: ...B 10 Connector Information Removable Hard Drive SCSI Connector S3GX_TRMBook Page 10 Friday September 19 1997 11 39 am...
Страница 216: ...Index vi S3GX_TRMBook Page vi Friday September 19 1997 11 39 am...