Reply 360 of 551, by LeFlash
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feipoa wrote on 2021-10-22, 11:40:What was the result with running dual Tillamooks? I recall reading somewhere that Intel removed SMP on the Tillamooks entirely, not just disabled it. Probably to reduce the transistor count. I tried dual Tillamooks on a socket 5 system using Evergreen and Kingston adapters, but it will only ever see one CPU. If I use the regular P233MMX chips, the system detects both.
At least the corresponding pins are N/C or otherwise used according to the datasheet.
It explicitly mentions the missing SMP.
https://www.versalogic.com/wp-content/themes/ … f/tillamook.pdf
Page 14:
Differences from Desktop Processors The following features have been eliminated in the low-power embedded Pentium processor with […]
Differences from Desktop Processors
The following features have been eliminated in the low-power embedded Pentium processor with
MMX technology: Upgrade, Dual Processing (DP), and Master/Checker functional redundancy.
Table 1 lists the corresponding pins that exist on the Pentium processor with MMX technology but
have been removed on the low-power embedded Pentium processor with MMX technology.
Table 1. Signals Removed from the Low-Power Embedded Pentium® Processor
with MMX™ Technology
Signal Function
ADSC#
Additional Address Status. This signal is mainly used for large or standalone L2
cache memory subsystem support required for high-performance desktop orserver models.
BRDYC#
Additional Burst Ready. This signal is mainly used for large or standalone L2
cache memory subsystem support required for high-performance desktop orserver models.
CPUTYP CPU Type. This signal is used for dual processing systems.
D/P# Dual/Primary processor identification. This signal is only used for an upgrade
processor.
FRCMC# Functional Redundancy Checking. This signal is only used for error detection via
processor redundancy and requires two Pentium processors (master/checker).
PBGNT# Private Bus Grant. This signal is only used for dual processing systems.PBREQ# Private Bus Request. This signal is used only for dual processing systems.
PHIT# Private Hit. This signal is only used for dual processing systems.
PHITM# Private Modified Hit. This signal is only used for dual processing systems.
you can never be sure, but why should the datasheet lie in case of the pinout?