MU9C8148
REGISTER SET DESCRIPTION (CONT’D)
BIT
NAME
DESCRIPTION
04H: Source Ring Number Register
15–12 ID3–0
11–0 SR11–0
ID3–0 contain the version number of the MU9C8148.
SR11–0 contain the 12-bit Ring Number for this port (Source Ring Number).
05H: Bridge/Destination Ring Number Register A
15–12 BNA3–0
11–0 DRA11–0
BNA3–0 contain the Bridge Number for remote port A.
DRA11–0 contain the Destination Ring Number for remote port A. If DRA11–0 are all LOW,
Bridge/Destination Ring combination A is disabled and doesn't take part in SRB comparisons
.
06H: Bridge/Destination Ring Number Register B
15–12 BNB3–0
11–0 DRB11–0
BNB3–0 contain the Bridge Number for remote port B.
DRB11–0 contain the Destination Ring Number for remote port B. If DRB11–0 are all LOW,
Bridge/Destination Ring combination B is disabled and doesn't take part in SRB comparisons.
07H: Bridge/Destination Ring Number Register C
15–12 BNC3–0
11–0 DRC11–0
BNC3–0 contain the Bridge Number for remote port C.
DRC11–0 contain the Destination Ring Number for remote port C. If DRC11–0 are all LOW,
Bridge/Destination Ring combination C is disabled and doesn't take part in SRB comparisons.
08H: Bridge/Destination Ring Number Register D
15–12 BND3–0
11–0 DRE11–0
BND3–0 contain the Bridge Number for remote port D.
DRD11–0 contain the Destination Ring Number for remote port D. If DRD11–0 are all LOW,
Bridge/Destination Ring combination D is disabled and doesn't take part in SRB comparisons.
09H: Bridge/Destination Ring Number Register E
15–12 BNE3–0
11–0 DRE11–0
BNE3–0 contain the Bridge Number for remote port E.
DRE11–0 contain the Destination Ring Number for remote port E. If DRE11–0 are all LOW,
Bridge/Destination Ring combination E is disabled and doesn't take part in SRB comparisons.
0AH: Bridge/Destination Ring Number Register F
15–12 BNF3–0
11–0 DRF11–0
BNF3–0 contain the Bridge Number for remote port F.
DRF11–0 contain the Destination Ring Number for remote port F. If DRF11–0 are all LOW,
Bridge/Destination Ring combination F is disabled and doesn't take part in SRB comparisons.
0BH: Bridge/Destination Ring Number Register G
15–12 BNG3–0
11–0 DRG11–0
BNG3–0 contain the Bridge Number for remote port G.
DRG11–0 contain the Destination Ring Number for remote port G. If DRG11–0 are all LOW,
Bridge/Destination Ring combination G is disabled and doesn't take part in SRB comparisons.
0CH: Instruction Buffer (IB)
First Access
15–0 IB15–IB0
Second Access
IB15–0 contain the information that is written to or read from the D15–0 bits of the IB location
(00H to 7FH) pointed to by the address pointer.
15
14
13
12
/W
If LOW, data is written to the LANCAM. If HIGH, data is read from the LANCAM.
If LOW, this instruction is a command. If HIGH, this instruction is data.
If LOW, the LANCAM will output /MF in the case of a match. If HIGH, /MF is held HIGH.
Special instruction bit. If S is HIGH, the instruction stored at the location pointed to by the address
pointer is a MU9C8148 instruction. If S is LOW, the instruction is a LANCAM instruction.
/CM
/EC
S
11–0 Reserved
Rev. 5.5 Draft web
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MUSIC [ MUSIC SEMICONDUCTORS ]
