colour of the SBus CG6 card, also known as the LEGO (Low End Graphics Option). SPARCstation 4 The SPARCstation 4 (code-named Perigee) was introduced in February 1995 to provide a lower price point than the SPARCstation 5 and replace the SPARCclassic. Although offered with the same 70, 85, or 110 MHz microSPARC-II processor as the SPARCstation 5, it has only one SBus expansion slot instead of three, a single 1.05 GB hard drive, and maximum memory capacity of 160 MB instead of 256 MB (five DSIMM slots). Instead of the built-in audio of the SPARCstation 5, the SPARCstation 4 requires an optional module, installed in its own dedicated slot. The system includes a built-in 8-bit color pixel-accelerated graphics adapter (TCX) capable of 1152x900 (or 1280x1024 with an optional 1 MB VSIMM), and a new lower-cost 17" monitor was introduced as an option. There is no AFX graphics port. The SPARCstation 4 has a standard AUI Ethernet connector, unlike the SPARCstation 5 which requires a special cable to mate with a non-standard connector. SPARC Xterminal 1 Sun used the same enclosure as the SPARCstation 4 for the SPARC Xterminal 1, which was, as the name implies, marketed as an X terminal, with no local storage. Unlike the earlier SPARCclassic X, it did not use the same motherboard as the workstation it was derived from, instead using a lower-powered 50 MHz microSPARC processor and expansion from its base memory of 8 MB to 128 MB rather than 160 MB (four DSIMM slots). Rather than running Solaris, the SPARC Xterminal 1 and SPARCclassic X loaded and ran special software over the network. Sun offered an upgrade kit to a full workstation that included a swap to a SPARCstation 4 motherboard, a hard drive and additional memory. Operating systems The following operating systems will run on a SPARCstation 5: SunOS 4.1.3_U1B onwards Solaris 2.3 Edition II to Solaris 9 Linux - Most distributions of Linux have compatibility issues with TurboSPARC variants MirBSD/sparc NetBSD/sparc OpenBSD/sparc NeXTSTEP - TurboSPARC variants not supported OPENSTEP/Mach - TurboSPARC variants not supported See also SPARCstation References External links Obsolyte: SPARCstation 5 Parts List for SPARCstation 5 "Sun AFX bus speeds graphics", article about the AFX bus and AFX graphics cards in Electronic News Sun workstations SPARC microprocessor products