Service manual

1-34 AlphaServer DS20 Service Manual
1.13 TIG Bus
The Timing, Interrupt, and General bus (TIG) performs a number of functions;
it carries all system interrupts, timing signals and provides the path to the
diagnostic and console flash ROMs.
Figure 1-18 TIG Bus Block Diagram
C ChipP Chip
D Chips
CPU s
CAP
Bus
PAD
Bus
CPU
Data
Bus
Flash
ROM
Config
Registers
and
switchpack
IRQs
Interrupt
data lines
TIG Bus