Display Interface
11-23
RAMDAC
register at 0x38000220 and the value 0x00 would be written into the Index
High register at 0x38000228, and then the read enable register could be
accessed at 0x38000230.
The column ‘CONTENTS’ shows the values which must be used for the
SPARCbook 3 to operate correctly. Values are shown for 8 , 16, 24 and 32
bits per pixel (BPP), where these differ.
The column ‘ORDER’ shows the order in which the registers are
programmed during initialization. It is recommended that this sequence is
adhered to to ensure correct operation.
Note
The RAMDAC provides a register index autoincrement facility which simplifies
accesses to the control registers. This mechansim is usefull when writing to the
cursor array, for example, but is not recommended when initailizing SPARCbook 3
because the registers are not programmed in index sequence.
Order
Accessed
Register
Contents
Index
Name
8 BPP
16 BPP
24 BPP
32 BPP
0000
Revisions Register
0001
ID Register
4
0002
Miscellaneous Clock Register
0x7
0x5
0x27
0x3
5
0003
Synchronization Control
0
6
0004
Horizontal Sync Position
0
7
0005
Power Management
8
0006
DAC Operation
Sync on green etc..
9
0007
Palette Control
0
15
0008
System Clock Control
0x01
0009
Reserved
10
000A
Pixel Format
0x03
0x04
0x05
0x06
11
000B
8 BPP Control
0x0
000C
16 BPP Control
0xC6
000D
24 BPP Packed Control
0x01
000E
32 BPP Control
0x03
Table 11-12 RAMDAC Indexed Registers
S3GX_TRMBook Page 23 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...