80960KA datasheet(10/43 Pages) INTEL

10 / 43 page

80960KA

debug instruction. In each case, the 80960KA

executes the instruction first and then calls a trace

handling routine (usually part of a software debug

monitor). Further program execution is halted until the

routine completes, at which time execution resumes

at the next instruction. The 80960KA’s tracing

mechanisms, implemented completely in hardware,

greatly simplify the task of software test and debug.

1.1.10. Fault Detection

The 80960KA has an automatic mechanism to handle

faults. Fault types include trace and arithmetic faults.

When the processor detects a fault, it automatically

calls the appropriate fault handling routine and saves

the current instruction pointer and necessary state

information to make efficient recovery possible. Like

interrupt handling routines, fault handling routines are

usually written to meet the needs of specific applica-

tions and are often included as part of the operating

system or kernel.

For each of the fault types, there are numerous

subtypes that provide specific information about a

fault. The fault handler can use this specific infor-

mation to respond correctly to the fault.

1.1.11. Built-in Testability

Upon reset, the 80960KA automatically conducts an

exhaustive internal test of its major blocks of logic.

Then, before executing its first instruction, it does a

zero check sum on the first eight words in memory to

ensure that the memory image was programmed

correctly. If a problem is discovered at any point

during the self-test, the 80960KA asserts its FAILURE

pin and will not begin program execution. Self test

takes approximately 47,000 cycles to complete.

System manufacturers can use the 80960KA’s self-

test feature during incoming parts inspection. No

special diagnostic programs need to be written. The

test is both thorough and fast. The self-test capability

helps ensure that defective parts are discovered

before systems are shipped and, once in the field, the

self-test makes it easier to distinguish between

problems caused by processor failure and problems

resulting from other causes.

1.1.12. CHMOS

The 80960KA is fabricated using Intel’s CHMOS IV

(Complementary High Speed Metal Oxide Semicon-

ductor) process. The 80960KA is currently available

in 16, 20 and 25 MHz versions.

80960KA Datasheet(PDF) 10 Page - Intel Corporation

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