UNIBUS signal registers ####################### Wire path for failed register loop back test ============================================== reg bit Register 0 write (74LS377 -> DS8641) 0 0 U05.03 -> U05.02 -> U08.14 -> U08.15 -> BG4_OUT 0 1 U05.04 -> U05.05 -> U08.11 -> U08.12 -> BG5_OUT 0 2 U05.07 -> U05.06 -> U08.02 -> U08.01 -> BG6_OUT 0 3 U05.08 -> U05.09 -> U08.05 -> U08.04 -> BG7_OUT 0 4 U05.13 -> U05.12 -> U07.14 -> U07.15 -> NPG_OUT 0 5 U05.14 -> U05.15 -> U07.11 -> U07.12 -> n.c. 0 6 U05.17 -> U05.16 -> U07.02 -> U07.01 -> n.c. 0 7 U05.18 -> U05.19 -> U07.05 -> U07.04 -> n.c. Register 0 read (74LVTH541 <- 74LS244) 0 0 U04.18 <- U04.02 <- U06.18 <- U06.02 <- BG4_IN 0 1 U04.17 <- U04.03 <- U06.16 <- U06.04 <- BG5_IN 0 2 U04.16 <- U04.04 <- U06.14 <- U06.06 <- BG6_IN 0 3 U04.15 <- U04.05 <- U06.12 <- U06.08 <- BG7_IN 0 4 U04.14 <- U04.06 <- U06.09 <- U06.11 <- NPG_IN 0 5 U04.13 <- U04.07 <- U06.07 <- U06.13 <- LTC 0 6 U04.12 <- U04.08 <- U06.05 <- U06.15 <- n.c. 0 7 U04.11 <- U04.09 <- U06.03 <- U06.13 <- n.c. Register 1 write (74LS377 -> DS8641) 1 0 U30.03 -> U30.02 -> U31.14 -> U31.15 -> BR4 1 1 U30.04 -> U30.05 -> U31.11 -> U31.12 -> BR5 1 2 U30.07 -> U30.06 -> U31.02 -> U31.01 -> BR6 1 3 U30.08 -> U30.09 -> U31.05 -> U31.04 -> BR7 1 4 U30.13 -> U30.12 -> U32.14 -> U32.15 -> NPR 1 5 U30.14 -> U30.15 -> U32.11 -> U32.12 -> SACK 1 6 U30.17 -> U30.16 -> U32.02 -> U32.01 -> BBSY 1 7 U30.18 -> U30.19 -> U32.05 -> U32.04 -> n.c. Register 1 read (74LVTH541 <- DS8641) 1 0 U29.18 <- U29.02 <- U31.13 <- U31.15 <- BR4 1 1 U29.17 <- U29.03 <- U31.10 <- U31.12 <- BR5 1 2 U29.16 <- U29.04 <- U31.03 <- U31.01 <- BR6 1 3 U29.15 <- U29.05 <- U31.06 <- U31.04 <- BR7 1 4 U29.14 <- U29.06 <- U32.13 <- U32.15 <- NPR 1 5 U29.13 <- U29.07 <- U32.10 <- U32.12 <- SACK 1 6 U29.12 <- U29.08 <- U32.03 <- U32.01 <- BBSY 1 7 U29.11 <- U29.09 <- U32.06 <- U32.04 <- n.c. Register 2 write (74LS377 -> DS8641) 2 0 U10.03 -> U10.02 -> U11.14 -> U11.15 -> A00 2 1 U10.04 -> U10.05 -> U11.11 -> U11.12 -> A01 2 2 U10.07 -> U10.06 -> U11.02 -> U11.01 -> A02 2 3 U10.08 -> U10.09 -> U11.05 -> U11.04 -> A03 2 4 U10.13 -> U10.12 -> U12.14 -> U12.15 -> A04 2 5 U10.14 -> U10.15 -> U12.11 -> U12.12 -> A05 2 6 U10.17 -> U10.16 -> U12.02 -> U12.01 -> A06 2 7 U10.18 -> U10.19 -> U12.05 -> U12.04 -> A07 Register 2 read (74LVTH541 <- DS8641) 2 0 U09.18 <- U09.02 <- U11.13 <- U11.15 <- A00 2 1 U09.17 <- U09.03 <- U11.10 <- U11.12 <- A01 2 2 U09.16 <- U09.04 <- U11.03 <- U11.01 <- A02 2 3 U09.15 <- U09.05 <- U11.06 <- U11.04 <- A03 2 4 U09.14 <- U09.06 <- U12.13 <- U12.15 <- A04 2 5 U09.13 <- U09.07 <- U12.10 <- U12.12 <- A05 2 6 U09.12 <- U09.08 <- U12.03 <- U12.01 <- A06 2 7 U09.11 <- U09.09 <- U12.06 <- U12.04 <- A07 Register 3 write (74LS377 -> DS8641) 3 0 U14.03 -> U14.02 -> U15.14 -> U15.15 -> A08 3 1 U14.04 -> U14.05 -> U15.11 -> U15.12 -> A09 3 2 U14.07 -> U14.06 -> U15.02 -> U15.01 -> A10 3 3 U14.08 -> U14.09 -> U15.05 -> U15.04 -> A11 3 4 U14.13 -> U14.12 -> U16.14 -> U16.15 -> A12 3 5 U14.14 -> U14.15 -> U16.11 -> U16.12 -> A13 3 6 U14.17 -> U14.16 -> U16.02 -> U16.01 -> A14 3 7 U14.18 -> U14.19 -> U16.05 -> U16.04 -> A15 Register 3 read (74LVTH541 <- DS8641) 3 0 U13.18 <- U13.02 <- U15.13 <- U15.15 <- A08 3 1 U13.17 <- U13.03 <- U15.10 <- U15.12 <- A09 3 2 U13.16 <- U13.04 <- U15.03 <- U15.01 <- A10 3 3 U13.15 <- U13.05 <- U15.06 <- U15.04 <- A11 3 4 U13.14 <- U13.06 <- U16.13 <- U16.15 <- A12 3 5 U13.13 <- U13.07 <- U16.10 <- U16.12 <- A13 3 6 U13.12 <- U13.08 <- U16.03 <- U16.01 <- A14 3 7 U13.11 <- U13.09 <- U16.06 <- U16.04 <- A15 Register 4 write (74LS377 -> DS8641) 4 0 U26.03 -> U26.02 -> U27.14 -> U27.15 -> A16 4 1 U26.04 -> U26.05 -> U27.11 -> U27.12 -> A17 4 2 U26.07 -> U26.06 -> U27.02 -> U27.01 -> C0 4 3 U26.08 -> U26.09 -> U27.05 -> U27.04 -> C1 4 4 U26.13 -> U26.12 -> U28.14 -> U28.15 -> MSYN 4 5 U26.14 -> U26.15 -> U28.11 -> U28.12 -> SSYN 4 6 U26.17 -> U26.16 -> U28.02 -> U28.01 -> n.c. 4 7 U26.18 -> U26.19 -> U28.05 -> U28.04 -> n.c. Register 4 read (74LVTH541 <- DS8641) 4 0 U13.18 <- U13.02 <- U27.13 <- U27.15 <- A16 4 1 U13.17 <- U13.03 <- U27.10 <- U27.12 <- A17 4 2 U13.16 <- U13.04 <- U27.03 <- U27.01 <- C0 4 3 U13.15 <- U13.05 <- U27.06 <- U27.04 <- C1 4 4 U25.14 <- U25.06 <- U28.13 <- U28.15 <- MSYN 4 5 U25.13 <- U25.07 <- U28.10 <- U28.12 <- SSYN 4 6 U25.12 <- U25.08 <- U28.03 <- U28.01 <- n.c. 4 7 U25.11 <- U25.09 <- U28.06 <- U28.04 <- n.c. Register 5 write (74LS377 -> DS8641) 5 0 U18.03 -> U18.02 -> U19.14 -> U19.15 -> D00 5 1 U18.04 -> U18.05 -> U19.11 -> U19.12 -> D01 5 2 U18.07 -> U18.06 -> U19.02 -> U19.01 -> D02 5 3 U18.08 -> U18.09 -> U19.05 -> U19.04 -> D03 5 4 U18.13 -> U18.12 -> U20.14 -> U20.15 -> D04 5 5 U18.14 -> U18.15 -> U20.11 -> U20.12 -> D05 5 6 U18.17 -> U18.16 -> U20.02 -> U20.01 -> D06 5 7 U18.18 -> U18.19 -> U20.05 -> U20.04 -> D07 Register 5 read (74LVTH541 <- DS8641) 5 0 U17.18 <- U17.02 <- U19.13 <- U19.15 <- D00 5 1 U17.17 <- U17.03 <- U19.10 <- U19.12 <- D01 5 2 U17.16 <- U17.04 <- U19.03 <- U19.01 <- D02 5 3 U17.15 <- U17.05 <- U19.06 <- U19.04 <- D03 5 4 U17.14 <- U17.06 <- U20.13 <- U20.15 <- D04 5 5 U17.13 <- U17.07 <- U20.10 <- U20.12 <- D05 5 6 U17.12 <- U17.08 <- U20.03 <- U20.01 <- D06 5 7 U17.11 <- U17.09 <- U20.06 <- U20.04 <- D07 Register 6 write (74LS377 -> DS8641) 6 0 U22.03 -> U22.02 -> U23.14 -> U23.15 -> D08 6 1 U22.04 -> U22.05 -> U23.11 -> U23.12 -> D09 6 2 U22.07 -> U22.06 -> U23.02 -> U23.01 -> D10 6 3 U22.08 -> U22.09 -> U23.05 -> U23.04 -> D11 6 4 U22.13 -> U22.12 -> U24.14 -> U24.15 -> D12 6 5 U22.14 -> U22.15 -> U24.11 -> U24.12 -> D13 6 6 U22.17 -> U22.16 -> U24.02 -> U24.01 -> D14 6 7 U22.18 -> U22.19 -> U24.05 -> U24.04 -> D15 Register 6 read (74LVTH541 <- DS8641) 6 0 U21.18 <- U21.02 <- U23.13 <- U23.15 <- D08 6 1 U21.17 <- U21.03 <- U23.10 <- U23.12 <- D09 6 2 U21.16 <- U21.04 <- U23.03 <- U23.01 <- D10 6 3 U21.15 <- U21.05 <- U23.06 <- U23.04 <- D11 6 4 U21.14 <- U21.06 <- U24.13 <- U24.15 <- D12 6 5 U21.13 <- U21.07 <- U24.10 <- U24.12 <- D13 6 6 U21.12 <- U21.08 <- U24.03 <- U24.01 <- D14 6 7 U21.11 <- U21.09 <- U24.06 <- U24.04 <- D15 Register 7 write (74LS377 -> DS8641) 7 0 U34.03 -> U34.02 -> U35.14 -> U35.15 -> INTR 7 1 U34.04 -> U34.05 -> U35.11 -> U35.12 -> PA 7 2 U34.07 -> U34.06 -> U35.02 -> U35.01 -> PB 7 3 U34.08 -> U34.09 -> U35.05 -> U35.04 -> INIT 7 4 U34.13 -> U34.12 -> U36.14 -> U36.15 -> ACLO 7 5 U34.14 -> U34.15 -> U36.11 -> U36.12 -> DCLO 7 6 U34.17 -> U34.16 -> U36.02 -> U36.01 -> n.c. 7 7 U34.18 -> U34.19 -> U36.05 -> U36.04 -> n.c. Register 7 read (74LVTH541 <- DS8641) 7 0 U33.18 <- U33.02 <- U35.13 <- U35.15 <- INTR 7 1 U33.17 <- U33.03 <- U35.10 <- U35.12 <- PA 7 2 U33.16 <- U33.04 <- U35.03 <- U35.01 <- PB 7 3 U33.15 <- U33.05 <- U35.06 <- U35.04 <- INIT 7 4 U33.14 <- U33.06 <- U36.13 <- U36.15 <- ACLO 7 5 U33.13 <- U33.07 <- U36.10 <- U36.12 <- DCLO 7 6 U33.12 <- U33.08 <- U36.03 <- U36.01 <- n.c. 7 7 U33.11 <- U33.09 <- U36.06 <- U36.04 <- n.c.