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1992: Cyrix
  week 23, 1992: Cyrix FasMath CX-83S87-20-JP
  week 24, 1992: Cyrix Cx486DLC-33GP black
  week 48, 1992: Cyrix Cx486DLC-33GP
  week 49, 1992: Cyrix Cx486DLC-40GP
  week 52, 1992: Cyrix FasMath CX-83S87-25-JP
» Cyrix overview
» all chips made in 1992
 
Cyrix FasMath CX-83S87-20-JP
Cyrix FasMath CX-83S87-20-JP Top Side
FasMath
CX-83S87-20-JP
AAE223M
Cyrix FasMath CX-83S87-20-JP Back Side
(C)(M)1989 Cyrix USA
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Core Frequency:20 MHz
Board Frequency:20 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Manufactured:week 23/1992
Made in:Korea
Package Type:Plastic
PLCC-68
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Cyrix Cx486DLC-33GP black
Cyrix Cx486DLC-33GP black Top Side
Cx486DLC
Cx486DLC-33GP
(C)(M) 1992 Cyrix USA AD3224N
Cyrix Cx486DLC-33GP black Back Side
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Core Frequency:33 MHz
Board Frequency:33 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Transistors:600,000
Voltage:5 V
Introduced:06/1992
Manufactured:week 24/1992
L1 Cache:1 KB
Package Type:Ceramic
PGA-132
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Cyrix Cx486DLC-33GP
Cyrix Cx486DLC-33GP Top Side
Cx486DLC-33GP
BB4248A
Cyrix Cx486DLC-33GP Back Side
(c)(M) 1992 Cyrix USA
JAPAN
A quite rare Version of this chip, a so called BB Version. An early piece and a little buggy.
 
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Core Frequency:33 MHz
Board Frequency:33 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Transistors:600,000
Voltage:5 V
Introduced:06/1992
Manufactured:week 48/1992
L1 Cache:1 KB
Package Type:Ceramic
PGA-132
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Cyrix Cx486DLC-40GP
Cyrix Cx486DLC-40GP Top Side
Cx486DLC-40GP
FOR OEM USE ONLY
AB6249Z
Cyrix Cx486DLC-40GP Back Side
(c)(M) 1992 Cyrix USA
JAPAN
Comment by Paul Collins (pi314aussie[at]yahoo.com):
Where is the 486 DLC2 -50 and the 486SLC2 -50? There was a turbo/upgrade card for the IBM PS/2 model 30/286. This IBM was a crap computer in standard guise. With the upgrage card raising the bar to 486 DLC2 -50 (but only running at 20MHz), the computer was still crap. Yes, the 486 DLC2 has the pin-for-pin out of a 386DX, and the brains/smarts of a 486SX2 inside. But with its 286 converted to 486, and its 10-clock doubled to 20-clock, the "real-world" MS-Windows apps. were only 10%-50% faster. Sure our benchmarking apps. agreed with the 8x (800%) boost, but those MS-apps. didn't run even 2x (200%) faster at all. So I say, once a "boat-anchor", always a boat-anchor. I read about the 486SLC2 -50 being a pin-for-pin out of a 386SX, with the brains of a 486SX2 inside, but never saw it implemented in any desktop computer, only the IBM laptops! The last of the last 386SX m/boards that I saw, were running the AMD386SX -40, with motherboard cache (8k). Since the AMD didn't have L1 cache, but the Cyrix/IBM did have L1 cache, why didn't they make no-name desktop m/boards with 25MHz clock for the SLC2 -50 chips???
 
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Core Frequency:40 MHz
Board Frequency:40 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Transistors:600,000
Voltage:5 V
Introduced:06/1992
Manufactured:week 49/1992
Made in:Japan
L1 Cache:1 KB
Package Type:Ceramic
PGA-132
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Cyrix FasMath CX-83S87-25-JP
Cyrix FasMath CX-83S87-25-JP Top Side
FasMath
CX-83S87-25-JP
ACE252A
Cyrix FasMath CX-83S87-25-JP Back Side
(C)(M)1989 Cyrix USA
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Core Frequency:25 MHz
Board Frequency:25 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Manufactured:week 52/1992
Made in:Korea
Package Type:Plastic
PLCC-68
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