Technical information

D-18 Compaq AlphaServer ES40 Service Guide
D.9 Ibox Control Register (I_CTL)
The Ibox control register (I_CTL) is a read-write register that controls
various Ibox functions. Its contents are cleared by chip reset.
0
FM-05853.AI8
SEXT(VPTB[47])
63
CHIP_ID[5:0]
12365789
10
11
13
12
141516171819
4748
202123 222930
TB_MB_EN
MCHK_EN
CALL_PAL_R23
PCT1_EN
PCT0_EN
SINGLE_ISSUE_H
VA_FORM_32
VA_48
SL_RCV
SL_XMIT
HWE
BP_MODE[1:0]
SBE[1:0]
SDE[1:0]
SPE[2:0]
IC_EN[1:0]
SPCE[0]
VPTB[47:32]
31
VPTB[31:30]
32
BIST_FAIL