AMD Geode SC1201 - Manual (Page 359)

AMD Geode™ SC1200/SC1201 Processor Data Book 359
Video Processor Module - Video Processor Registers - Function 4 32579B
7.3.2.2 VIP Support Registers - F4BAR2
F4 Index 18h, Base Address Register 2 (F4BAR2) points to
the base address of where the VIP Configuration registers are located. Table 7-10 shows the memory mapped VIP
support registers accessed through F4BAR2.
Table 7-10. F4BAR2+Memory Offset: VIP Configuration Registers
Bit Description
Offset 00h-03h Video Interface Port Configuration Register (R/W) Reset Value: 00000000h
31:23 Reserved. Must be set to 0.
22 VIP FIFO Bus Request Threshold. VIP FIFO issues a bus request when it is filled with 32 or 64 bytes.
0: 64 bytes.
1: 32 bytes
21 VBI Task B Store to Memory. When this bit is enabled, Raw VBI task B data is stored to memory.
0: Disable.
1: Enable.
This bit is relevant only if bit 18 (VBI Configuration Override) = 1 (enabled).
20 VBI Task A Store to Memory. When this bit is enabled, Raw VBI task A data is stored to memory.
0: Disable.
1: Enable.
This bit is relevant only if bit 18 (VBI Configuration Override) = 1 (enabled).
19 VBI Ancillary Store to Memory. When this bit is enabled, Raw VBI Ancillary data is stored to memory.
0: Disable.
1: Enable.
This bit is relevant only if bit 18 (VBI Configuration Override) = 1 (enabled).
18 VBI Configuration Override. When this bit is enabled, bits [21:19] override the setup specified in bits 17 and 16.
0: Disable.
1: Enable.
17 VBI Data Task. Specifies the CCIR-656 video stream task used to store raw VBI data to memory.
0: Task B.
1: Task A.
This bit is relevant only if bit 16 (VBI Mode for CCIR-656) = 1 and bit 18 (VBI Configuration Override) = 0 (disabled).
16 VBI Mode for CCIR-656. Specifies the mode in which to store VBI data to memory.
0: Use CCIR-656 ancillary data to store VBI data to memory.
1: Use CCIR-656 video task A or B to store VBI data to memory, depending on the value of bit 17 (VBI Task).
This bit is only used if bit 18 (VBI Configuration Override) = 0 (disabled).
15:2 Reserved. Set to 0.
1:0 Video Input Port Mode. Selects VIP operating mode.
10: CCIR-656 mode.
All other decodes: Reserved.
Offset 04h-07h Video Interface Control Register (R/W) Reset Value: 00000000h
31:18 Reserved. Must be set to 0.
17 Line Interrupt. When asserted, allows interrupt (INTC#) generation when the Video Current Line register (F4BAR2+ Mem-
ory Offset 10h) contents equal the Video Line Target Register (F4BAR2+ Memory Offset 14h) contents.
0: Disable.
1: Enable.
16 Field Interrupt. When asserted, allows interrupt (INTC#) generation at the end of a field (i.e., the end of active video for the
current field). Interrupt generation can be enabled regardless of whether or not video capture (store to memory) is enabled.
0: Disable.
1: Enable.
15:11 Reserved. Must be set to 0.