Technical information

Performance
Instruction prefetch buffer size 12 bytes
On-chip cache
Size 6 Kbytes
Speed 28 nanoseconds
Associativity Direct mapped
Translation Buffer
Size 64 entry
Associativity Fully associative
Q22-bus address translation
map cache
Size 12 entry
Associativity Fully associative
I/O bus buffer size
Input 32 bytes
Output 4 bytes
Maximum I/O bandwidth
Block mode DMA read 2.4 Mbytes/second
Block mode DMA write 3.3 Mbytes/second
Ethernet Port
Supported protocols Ethernet V2.0
Supported media types Standard or ThinWire
Data path width 1 bit
Maximum bandwidth 10 Mbits/second
Buffer size
Transmit buffer 128 bytes/second
Receiver buffer 128 bytes/second
Digital Storage Systems Interconnect (DSSI) Connector
Maximum number of supported devices 7
Data path width 8 bits
Maximum bandwidth 4 Mbytes/second
Maximum queue I/O 800/second
Buffer size
Transmit buffer 128 bytes/second
Receiver buffer 128 bytes/second
1–16 VAX 4000 Model 200 Technical Information