Service manual

2-16 AlphaServer 4000/4100 Service Manual
2.7 Console Power-Up Tests
Once the SRM console is loaded, it does further testing of each IOD. Table 2-5
describes the IOD power-up tests, and Table 2-6 describes the PCI motherboard
power-up tests.
Table 2-5 IOD Tests
Test
Number Test Name Description
1 IOD CSR Access
test
Read and write all CSRs in each IOD.
2 Loopback test Dense space writes to the IOD’s PCI dense
space to check the integrity of ECC lines on
the IODs.
3 ECC test Loopback tests similar to test 2 but with a
varying pattern to create an ECC of 0s.
Single- and double-bit errors are checked.
4 Parity Error and Fill
Error tests
Parity errors are forced on the address and
data lines on system bus and PCI buses. A
fill error transaction is forced on the system
bus.
5 Translation Error
test
A loopback test using scatter/gather address
translation logic on each IOD.
6 Write Pending test Runs test 2 with the write-pending bit set
and clear in the CAP chip control register.
7 PCI Loopback test Loops data through each PCI on each IOD,
testing the mask field of the system bus.
8 PCI Peer-to-Peer
Byte Mask test
Tests that devices on the same PCI and on
different PCIs can communicate.