ST MICROELETRONICS  (SGS - THOMSON)

Traduzione Italiana
In 1987 the Italian SGS (Società Generale Semiconduttori) and the French Thomson Semiconducteurs merged into SGS Thomson, later to be called ST Microelectronics.
The company never designed an own x86 CPU, but entered an agreement to sell under its own name some of the CPUs that it produced for Cyrix which had no production plant, as it is well known.

I tested these CPUs with a nice mainboard, Aopen AP43 (all settings) and CPUID by Debbie Wiles.


ST5x86V12HS
CPU-ID Signature 2D05
REV 0.5

Code in the bottom : G5LB601B
ST5x86V10HS
ST5x86V10HS
CPU-ID Signature 2D05
REV 0.5

Code in the bottom : G5LB601E
ST486DX4V12HS ST486DX4V12HS
CPU-ID Signature 1F36
REV 4.6
ST486DX4V10HS ES
Engineering Sample
ST486DX4V10HS		 REV 4-6 CPU-ID Signature 1F36
REV 4.6



ST486DX4V10HS ST486DX4V10HS
CPU-ID Signature 1F36
REV 4.6
ST486DX4V10HS ST486DX4V10HS
CPU-ID Signature 1F36
REV 4.6

with Logo Windows 95
ST486DX4V10HS ST486DX4V10HS
CPU-ID Signature 1F36
REV 4.6

different printing :
486DX4-100
ST486DX2-80GS ST486DX2-80GS
CPU-ID Signature 1B32
REV. 4.2
ST486DX2-80GS ST486DX2-80GS
CPU-ID Signature 1B32
REV. 4.2

different printing
ST486DX2-66H1 ST486DX2-66H1
CPU-ID Signature 1B32


CUSTOM PIN-OUT
No M7  P/O but  P/O Intel P24D
ST486DX2-66 ST486DX2-66
CPU-ID Signature 1B0C
ST486DX2-66 ST486DX2-66
CPU-ID Signature 1B0B
ST486DX2-50
CPU-ID Signature 1B0B
ST486DX2-40 ST486DX2-40
CPU-ID Signature 1B08
ST486DX-50 ST486DX-50
CPU-ID Signature 1A0B
ST486DX-40 ST486DX-40
CPU-ID Signature 1A08