engineering sample samples qualification cpu processor prozessor information mhz pictures core frequency chip packaging info ic x86 museum collection amd cyrix harris ibm idt iit intel motorola nec sgs sgs-thomson siemens ST signetics mhs ti texas instruments ulsi hp umc weitek zilog 4004 4040 8008 808x 8085 8088 8086 80188 80186 80286 286 80386 386 i386 Am386 386sx 386dx 486 i486 586 486sx 486dx overdrive 80187 80287 387 487 pentium 586 5x86 386dlc 386slc 486dx2 mmx ppro pentium-pro pro athlon duron z80 sparc alpha dec dirk oppelt
home
Siemens R3000
  Siemens R3000-25-A
  Siemens R3000-25-QF
  Siemens R3000A-25-QF
  Siemens R3000A-33-AE
» Siemens overview
» all MIPS Rx000 chips
 
The Siemens / MIPS R3000 Processor
The first commercial MIPS CPU model, the R2000, was announced in 1985 as a 32-bit implementation. It was followed by the R3000, the first successful MIPS design in the marketplace with more than 1 million processors made. The R3000 was used in high-end UNIX computers by Siemens and DEC and in the Silicon Graphics SGI Personal IRIS 4D/20 graphic workstations. On this machines 3D sequences for movies like The Abyss, Jurrasic Park or Terminator 2 were rendered.
 
The R3000 has an interface to handle 3 coprocessors. Each coprocessor has a flag line connected with the CPU that can be tested and a conditional branch executed dependent on its value. Coprocessor instructions can be executed directly from the instruction stream.
Coprocessor 0 (CP0) is incorporated on the CPU chip and supports the virtual memory system and exception handling. It is also referred to as the System Control Coprocessor. CP1 is reserved for the floating point coprocessor. An FPU is mandatory for most R3000 systems. CP2 is available for specific implementations and is often used to accelerate memory access by connecting it to an R3020 memory buffer or an R3220 read/write buffer chip. Later versions of the R3000 (R3000A) had built in memory buffer circuitry.
 
Reference:  R3000 at SGIstuff  R3000 information (German)
Siemens R3000-25-A
Siemens R3000-25-A Top Side
SIEMENS
SAB
R3000-25-A
S01420190
(M)(C)MIPS'89
W-GERMANY
PP002082
012
Siemens R3000-25-A Back Side
add comment
Core Frequency:25 MHz
Board Frequency:25 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Transistors:110,000
Circuit Size:1.20
Introduced:1988
Manufactured:week 01/1990
Made in:Germany
Package Type:Ceramic
Goldcap
PGA-145
top of page
Siemens R3000-25-QF
Siemens R3000-25-QF Top Side
SIEMENS
SAB-R3000-25-QF
S10420190
21-31031-06
042
(M)(C)MIPS'89
W-GERMANY
Siemens R3000-25-QF Back Side
Donated by Dennis Grevenstein. Thanks a lot!  
add comment
Core Frequency:25 MHz
Board Frequency:25 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Transistors:110,000
Circuit Size:1.20
Introduced:1988
Manufactured:week 01/1990
Made in:Germany
Package Type:Ceramic
QFP-132
top of page
Siemens R3000A-25-QF
Siemens R3000A-25-QF Top Side
R3000A-25-QF
S10420890R
21-34379-02
144
(M)(C)MIPS'89
GERMANY
Siemens R3000A-25-QF Back Side
add comment
Core Frequency:25 MHz
Board Frequency:25 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Transistors:110,000
Circuit Size:1.20
Introduced:1988
Manufactured:week 08/1990
Made in:Germany
Package Type:Ceramic
QFP-132
top of page
Siemens R3000A-33-AE
Siemens R3000A-33-AE Top Side
R3000A-33-AE
S10420890R
140
(M)(C)MIPS'89
GERMANY
Siemens R3000A-33-AE Back Side
add comment
Core Frequency:33 MHz
Board Frequency:33 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Transistors:110,000
Circuit Size:1.20
Introduced:1988
Manufactured:week 08/1990
Made in:Germany
Package Type:Ceramic
Goldcap
PGA-175
top of page