RG82845 S L5YQ Intel, RG82845 S L5YQ Datasheet - Page 89
RG82845 S L5YQ
Manufacturer Part Number
RG82845 S L5YQ
Description
Manufacturer
Intel
Datasheet
1.RG82845_S_L5YQ.pdf
(148 pages)
Specifications of RG82845 S L5YQ
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3.6.16
Intel
®
82845 MCH for SDR Datasheet
R
SSTS1—Secondary PCI-PCI Status Register (Device 1)
Address Offset:
Default Value:
Access:
Size:
SSTS1 is a 16-bit status register that reports the occurrence of error conditions associated with
secondary side (i.e., AGP side) of the “virtual” PCI-PCI bridge embedded in the MCH.
10:9
Bit
4:0
15
14
13
12
11
8
7
6
5
Detected Parity Error (DPE1)—R/WC.
0 = Software sets this bit to 0 by writing a 1 to it.
1 = MCH detected a parity error in the address or data phase of AGP bus transactions.
Reserved.
Received Master Abort Status (RMAS1)—R/WC.
0 = Software sets this bit to 0 by writing a 1 to it.
1 = MCH terminated a Host-to-AGP with an unexpected master abort.
Received Target Abort Status (RTAS1)—R/WC.
0 = Software sets this bit to 0 by writing a 1 to it.
1 = MCH-initiated transaction on AGP is terminated with a target abort.
Signaled Target Abort Status (STAS1)—RO. Hardwired to a 0. The MCH does not generate
target abort on AGP.
DEVSEL# Timing (DEVT1)—RO. Hardwired to 01. This 2-bit field indicates the timing of the
DEVSEL# signal when the MCH responds as a target on AGP. This field indicates the time
when a valid DEVSEL# can be sampled by the initiator of the PCI cycle.
01 = Medium timing.
Master Data Parity Error Detected (DPD1)—RO. Hardwired to 0. MCH does not implement
G_PERR# signal.
Fast Back-to-Back (FB2B1)—RO. Hardwired to 1. MCH as a target supports fast back-to-back
transactions on AGP.
Reserved.
66 MHz Capable (CAP66)—RO. Hardwired to 1. AGP bus is capable of 66 MHz operation.
Reserved.
1E–1Fh
02A0h
RO, R/WC
16 bits
Descriptions
Register Description
89
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