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IDT R3020 MB
  IDT 79R3020-20G
  IDT 79R3020-33G
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The IDT R3020 Memory Buffer
Early implementations of R2000/R3000 processors had no write buffer circuit inside to isolate the CPU from memory subsystem. There were companion chips for R2000/R3000 to implement write buffering, connected via the CP2 coprocessor interface of the R3000 CPU. Newer designs of the R3000 (R3000A) have built in memory buffer circuitry.
IDT 79R3020-20G
IDT 79R3020-20G Top Side
IDT
79R3020
-20G
8911BI
IDT 79R3020-20G Back Side
EB8046
USA
An R3020 Memory Buffer coprocessor for the MIPS R3000 CPU
 
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Core Frequency:20 MHz
Board Frequency:20 MHz
Introduced:1988
Manufactured:week 11/1989
Made in:USA
Package Type:Ceramic
PGA-68
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IDT 79R3020-33G
IDT 79R3020-33G Top Side
IDT
79R3020
-33G
8923BI
IDT 79R3020-33G Back Side
G0113
USA
An R3020 Memory Buffer coprocessor for the MIPS R3000 CPU
 
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Core Frequency:33 MHz
Board Frequency:33 MHz
Introduced:1988
Manufactured:week 23/1989
Made in:USA
Package Type:Ceramic
PGA-68
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