Sun-4
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Sun-4 was the name given to a series of UNIX computer workstations and servers produced by Sun Microsystems, launched in 1987. The original Sun-4 series were VMEbus-based systems similar to the earlier Sun-3 series, but employing microprocessors based on Sun's own SPARC V7 RISC architecture in place of the 68k family processors of previous Sun models.
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[edit] Sun-4 models
| Model | Codename | CPU board | CPU | CPU MHz | Max. RAM | Chassis |
|---|---|---|---|---|---|---|
| 4/260 | Sunrise | Sun 4200 | Fujitsu SF9010 IU, Weitek 1164/1165 FPU |
16.67 MHz | 128 MB | 12-slot VME (deskside) |
| 4/280 | Sunrise | Sun 4200 | Fujitsu SF9010 IU, Weitek 1164/1165 FPU |
16.67 MHz | 128 MB | 12-slot VME (rackmount) |
| 4/110 | Cobra | Sun 4100 | Fujitsu MB86900 IU, Weitek 1164/1165 FPU (optional) |
14.28 MHz | 32 MB | 3-slot VME (desktop/side) |
| 4/150 | Cobra | Sun 4100 | Fujitsu MB86900 IU, Weitek 1164/1165 FPU (optional) |
14.28 MHz | 32 MB | 6-slot VME (deskside) |
In 1989, Sun dropped the "Sun-4" name for marketing purposes in favor of the SPARCstation and SPARCserver brands for new models. However, early SPARCstation/server models were also assigned Sun-4-series model numbers (eg. the SPARCstation 1 was also known as the Sun 4/60). This practice was phased out with the introduction of the SPARCstation 10 in 1992. The term Sun-4 continued to be used in an engineering context to identify the basic hardware architecture of all SPARC-based Sun systems.
Sun 4/110, 4/150, 4/260 and 4/280 systems upgraded with the Sun 4300 CPU board (as used in the SPARCserver 300 series) were referred to as the 4/310, 4/350, 4/360 and 4/380 respectively.
[edit] Variants
The Sun-4 architecture per se refers to the VME-based architecture described above and used in the 4/100, 4/200, SPARCserver 300 and SPARCserver 400 ranges. Sun-4 support was included in SunOS 4.0 onwards and Solaris 2.1 to 2.4.
Several variations on the Sun-4 architecture were subsequently developed:
- Sun-4c (C presumably for Campus, the codename of the first Sun-4c model, the SPARCstation 1): this desktop workstation/low-end server variant substituted the 32-bit SBus expansion bus in place of VME and introduced a new MMU design. Supported by SunOS 4.0.3c onwards and Solaris 2.0 to 7.
- Sun-4e: a hybrid Sun-4c/VME architecture found in the SPARCengine 1 (Sun 4/E) VME embedded controller. Supported by SunOS 4.0.3e and 4.1e and Solaris 2.1[citation needed] to 2.4.
- Sun-4m: originally a multiprocessor Sun-4 variant, based around the MBus processor module bus introduced in the SPARCserver 600MP series. The Sun-4m architecture later also encompassed non-MBus uniprocessor systems such as the SPARCstation 5, utilizing SPARC V8-architecture processors. Supported by SunOS 4.1.2 onwards and Solaris 2.1 to 9. SPARCserver 600MP support was dropped after Solaris 2.5.1.
- Sun-4d (D for Dragon, the codename of the SPARCcenter 2000): a high-end multiprocessor architecture, based around the XDBus processor interconnect, scalable up to 20 processors. The only Sun-4d systems produced by Sun were the SPARCserver 1000 and SPARCcenter 2000 series. The Cray CS6400 was also nominally a Sun-4d machine, although it required a custom version of Solaris. Supported by Solaris 2.2 to 8.
- Sun-4u: this variant introduced the 64-bit UltraSPARC (SPARC V9) processor architecture and UPA processor interconnect first used in the Sun Ultra series. Supported by Solaris 2.5 onwards. UltraSPARC I support was dropped after Solaris 9.
- Sun-4u1: Sometimes used to identify the Enterprise 10000 (Starfire) 64-way multiprocessor server architecture. The Starfire is supported by Solaris 2.5.1 onwards.
- Sun-4v (V presumably for "virtualized"): this is a variation on Sun-4u which includes hypervisor processor virtualization; introduced in the UltraSPARC T1 (Niagara) multicore processor. Supported by Solaris 10 3/05 HW2 onwards.
