Difference between revisions of "KA650 CPU"
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| − | The '''KA650''' is the [[Central Processing Unit|CPU]] used in [[Digital Equipment Corporation|DEC]] | + | The '''KA650''' is the [[Central Processing Unit|CPU]] used in several [[Digital Equipment Corporation|DEC]] [[MicroVAX]] systems. It is a single [[DEC card form factor|quad]]-height [[printed circuit board|PCB]] which plugs into a [[QBUS]] [[backplane]]. [[#ref_4|[4]]] |
| − | The KA650 is implemented using the [[CVAX]] with [[floating point]] [[instruction]] support provided by the [[CFPA]], [[main memory]] control provided by [[CMCTL]], and various system support functions by the [[SSC]]. | + | The KA650 is implemented using the [[CVAX]], with [[floating point]] [[instruction]] support provided by the [[CFPA]], [[main memory]] control provided by [[CMCTL]], and various system support functions by the [[SSC]]. |
There are two versions of the KA650: | There are two versions of the KA650: | ||
| Line 44: | Line 44: | ||
* KA650-B: 23-194E7 and 23-195E7 | * KA650-B: 23-194E7 and 23-195E7 | ||
| − | You need different VMS software licenses for the two KA650 versions. | + | You need different [[VMS]] software licenses for the two KA650 versions. |
For information on KA650 revisions and compatible options see: [[KA650 Revision Control]]. | For information on KA650 revisions and compatible options see: [[KA650 Revision Control]]. | ||
| Line 50: | Line 50: | ||
==Memory Subsystem== | ==Memory Subsystem== | ||
| − | The KA650 memory subsystem | + | The KA650 uses a custom [[main memory]] subsystem, the [[KA650 Main Memory System]]. |
{{semi-stub}} | {{semi-stub}} | ||
| − | == References == | + | ==References== |
| − | + | <div id="ref_1">[1] ''CVAX-based Systems'', [[Digital Technical Journal]], Vol. 1 No. 7, August 1988</div> | |
| + | <div id="ref_2">[2] ''VAXcluster Systems: Guidelines for VAXCcuster System Configurations'' (EK-VAXCT-CG-006)</div> | ||
| + | <div id="ref_3">[3] ''650QS Pedestal, BA213 Field Maintenance Print Set'' (MP-02538-01)</div> | ||
| + | <div id="ref_4">[4] ''KA650-AA CPU Module Technical Manual'' (EK-KA650-UG-002)</div> | ||
==External links== | ==External links== | ||
| − | * | + | * [http://www.bitsavers.org/pdf/dec/vax/650/ VAX 650] - documentation at [[Bitsavers]] |
| − | * | + | ** [http://www.bitsavers.org/pdf/dec/vax/650/EK-KA650-UG-002_KA650-AA_CPU_Module_Technical_Manual_Aug88.pdf KA650-AA CPU Module Technical Manual] (EK-KA650-UG-002) |
| − | * | + | * [https://manx-docs.org/collections/antonio/dec/MDS-2000-01/cd1/CLUSTER/VAXCTCG6.PDF VAXcluster Systems: Guidelines for VAXCcuster System Configurations] (EK-VAXCT-CG-006) |
[[Category: VAX QBUS Processors]] | [[Category: VAX QBUS Processors]] | ||
Revision as of 17:42, 31 March 2023
| KA650 | |
| Summary | |
|---|---|
| OS support (VMS): | V4.7A or later |
| OS support (ULTRIX): | ULTRIX V2.2 |
| CPU Details | |
| CPU name (VMS): | KA650 |
| CPU module: | KA650 |
| Module: | M7620 [3] |
| Number of processors: | 1 |
| VMS DCL CPU: | 10 |
| VMS DCL XCPU: | 1 |
| SID: | 0A000005 |
| XSID: | 01530101 |
| CPU chip: | 78034 (CVAX) [1] |
| FPU chip: | 78132 |
| CPU technology: | CMOS |
| CPU cycle time: | 90ns [4] |
| Instruction-buffer: | 12 bytes [1] |
| Translation-buffer: | 28 entries [1] |
| Cache: | 1KB (90ns) [1] |
| Backup cache: | 64KB (180ns longword, 270ns quadword) [4] |
| Compatibility mode: | No |
| Console processor: | CPU |
| Console device: | None |
| Firmware version: | V5.3 |
| Console speed: | 300 to 38400 |
| Memory | |
| Minimum memory: | 8MB |
| Maximum memory: | 64MB |
| Memory checking: | 32 + 7 bit ECC [4] |
| Memory cycle: | 450ns longword, 720ns quadword [4] |
| I/O | |
| Q-bus: | 1 @ 3.3MB/s |
| Performance | |
| VUPs: | 2.7 [2] |
The KA650 is the CPU used in several DEC MicroVAX systems. It is a single quad-height PCB which plugs into a QBUS backplane. [4]
The KA650 is implemented using the CVAX, with floating point instruction support provided by the CFPA, main memory control provided by CMCTL, and various system support functions by the SSC.
There are two versions of the KA650:
- KA650-A (M7620-A): Time-Sharing CPU
- KA650-B (M7620-B): Workstation / Server CPU
The only differences between the two CPUs are the system ROMs:
- KA650-A: 23-192E7 and 23-193E7
- KA650-B: 23-194E7 and 23-195E7
You need different VMS software licenses for the two KA650 versions.
For information on KA650 revisions and compatible options see: KA650 Revision Control.
Memory Subsystem
The KA650 uses a custom main memory subsystem, the KA650 Main Memory System.
References
[1] CVAX-based Systems, Digital Technical Journal, Vol. 1 No. 7, August 1988
[2] VAXcluster Systems: Guidelines for VAXCcuster System Configurations (EK-VAXCT-CG-006)
[3] 650QS Pedestal, BA213 Field Maintenance Print Set (MP-02538-01)
[4] KA650-AA CPU Module Technical Manual (EK-KA650-UG-002)
External links
- VAX 650 - documentation at Bitsavers
- KA650-AA CPU Module Technical Manual (EK-KA650-UG-002)
- VAXcluster Systems: Guidelines for VAXCcuster System Configurations (EK-VAXCT-CG-006)
