![Tadpole SPARCbook 3 series Скачать руководство пользователя страница 157](http://html2.mh-extra.com/html/tadpole/sparcbook-3-series/sparcbook-3-series_reference-manual_3192948157.webp)
Display Interface
11-7
Power 9100 User Interface Controller
non-interleaved VRAM modes. These registers are initialized during
system startup and but can be reprogrammed discretely via a user interface
provided by the NCE Display panel.
11.2.4 SVGA unit
The Power 9100 contains an SVGA unit which is functionally independent
of the main graphics engine. Although implemented in hardware, the
software drivers provided for the Power 9100 for the SPARCbook 3 Solaris
implementation do not support SVGA operations.
11.2.5 Power 9100 host interface
The Power 9100 provides a memory mapped host interface which supports
accesses into three distinct functional areas. These are:
•
Configuration registers
•
Status and control registers and command locations
•
Display frame buffer
Configuration registers
Basic configuration for the Power 9100’s operating environment (such as
host bus type, RAMDAC type and VRAM sihift register size) is controlled
during power-up by a number of pullup resistors connected to the frame
buffer data ouptut pins. This results in a 32-bin configuration word which
is stored in the Power-up Configuration Register at 0x38000198.
During subesequent system initailization sequence, four 8-bit configuration
registers must be written to set up the Power 9100 correctly for its
SPARCbook 3 operating environment. These configuration registers are
accessible via an index register at 0x30009100 and data register at
0x30009104. Table 11-1 summarizes these registers and the values that
must be (S3 Values) used to ensure correct operation. Note that the
Command register CONFIG[4], is the last register written to to enable chip
operation.
Register
Index
Name
Function
S3
Value
04
CONFIG[4]
Command Register (7:0)
0xA3
13
CONFIG[19]
Display Memory Base Address Register
0x00
30
CONFIG[48]
Expansion ROM Base Address Register
0x00
41
CONFIG[65]
Configuration Register
0x00
Table 11-1 Required Configuration Register Values
S3GX_TRMBook Page 7 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...