20 November, 2002

Model S20, S/N 624F02BF

This system is a replica of the SPARCstation 20 I had on my desk when I was a network operator at worlds.net, circa summer, 1996.

After we installed the three CG6 framebuffers, we had to make a decision whether to use the fourth SBus slot to add 100 Mbit ethernet, or fast-wide SCSI. We chose to add SCSI, though I can't recall why. This system is lookingglass as it should have been: with a SunSwift card in the fourth slot, offering both options on a single SBus card.

Additionally, the original lookingglass had a different assortment of external SCSI devices than this system does. I do have the devices I would need to make it identical, but they're finding more suitable use on other machines currently.

501-2924 mainboard:

• 2 MBus slots, 50 MHz maximum clock
• 4 64-bit SBus slots, 25 MHz clock
• 8 200-pin DIMM slots, 2 with VSIMM support
  • 192 MB in 6x 501-2622 32 MB, 60ns modules
  • 8 MB VRAM in 1x 501-2482 VSIMM
  • one empty slot, with VSIMM support.
  
  
  
• Crystal Semiconductor CS4215 16-bit stereo audio CODEC
• Sun STP2000QFP 32-bit SBus Master I/O Controller:
  • NCR 53C9x Fast SCSI Controller
  • NCR 92C990 Ethernet Controller
  • Centronics Parallel port
• Sun STP2014QFP SBus-to-EBus Controller
• Sun STP2016QFP Clock-2 Generator
• Sun STP4000QFP ISDN DBRI Controller
• 2x Zilog 85C3008 RS232/RS422 Controllers

Built-in ports:

• Monitor, for onboard SX (CG14) framebuffer (DB 13W3)
• Serial A/B (DB25F)
• Keyboard/Mouse (8 pin miniDIN)
• Parallel (HD26)
• Ethernet AUI (HD26)
• Ethernet TP (RJ45)
• SCSI (HD50)
• Headphone, microphone, audio line-in, audio line-out (4x 1/8" phono)

501-2482 8 MB VSIMM:

• Uses one of two VRAM-support-enabled memory slots
• Enables onboard SX (CG14) framebuffer
• 1280x1024 @ 76 Hz
• 24 plane color
• Composite sync

501-2520 SM71 CPU module (CPU 0):

• 75 MHz VBus clock
• SuperSPARC-II 1.6 CPU
• MXCC 3.3 cache Controller
• 1 MB L2 cache

501-3001 SM71 CPU module (CPU 1):

• 75 MHz VBus clock
• SuperSPARC-II 2.4.3 CPU
• MXCC 3.3 cache Controller
• 1 MB L2 cache

Internal SCSI backplane:

• 370-2368 hard disk (c0t3d0):
  • Fujitsu model M2954ESP
  • 4.2 GB, 7200 RPM, 3.5" LP
  • Single-ended Ultra-Wide, SCA
• 370-1550 hard disk (c0t1d0):
  • Conner model CP30540
  • 535 MB, 5200 RPM, 3.5" LP
  • Single-ended Fast-SCSI, SCA

Internal Drive Bays:

• 540-2500 Sun-CD 2+ (c0t6d0):
  • Sun Model 370-1682 CD-ROM drive:
    • Toshiba model XM-4101B
    • 650 MB, 5.25" LP, 300 RPM
    • Single-ended SCSI-2, 50-pin
  • Mounting bracket and grommet kit to fit SPARCstation 20

501-2739 SunSwift:

• Sun STP2002QFP FEPS Controller:
  • QLogic FAS366 SCSI Controller
  • Sun "Happy Meal" Fast Ethernet Controller
  • Centronics Parallel port
• 100base-TX Ethernet (RJ45)
• Fast-Wide single-ended SCSI (HD68)

501-2253 TGX framebuffer (cgsix0):

• DB 13W3
• 1152x900 @ 76Hz
• 8 plane color, double-buffered
• Composite sync
• Sun STP3010PGA TurboXGX Processor
• 220 MHz Bt467 RAMDAC
• 4 MB VRAM (16ea. KM428C256T-6)

501-2253 TGX framebuffer (cgsix1):

• DB 13W3
• 1152x900 @ 76Hz
• 8 plane color, double-buffered
• Composite sync
• Sun STP3010PGA TurboXGX Processor
• 220 MHz Bt467 RAMDAC
• 4 MB VRAM (16ea. KM428C256T-6)

501-2253 TGX framebuffer (cgsix2):

• DB 13W3
• 1152x900 @ 76Hz
• 8 plane color, double-buffered
• Composite sync
• Sun STP3010PGA TurboXGX Processor
• 220 MHz Bt467 RAMDAC
• 4 MB VRAM (16ea. KM428C256T-6)

300-1279 Autoranging PSU:

• 100-240VAC
• 47-63 Hz
• 150W continuous
• 174W max

320-1234 Type 5c Keyboard:

• US English, UNIX layout
• captive cable

Additional Peripherals:

• Sun 599-2035 External 7/14GB 8mm Tape Drive:
  • Sun Model 611 "UniPack" enclosure
  • Sun 370-1922 tape drive
    • Exabyte model 8505-XL
  • S/N 641G0037
• Sun 595-3264 External 2 GB SCSI Disk Drive:
  • Sun Model 411 "desktop" enclosure
  • Sun 370-2067 hard disk:
    • Seagate Model ST32550N
    • 2 GB, 7200 RPM, 3.5" LP
    • Single-Ended Fast-SCSI, 50-pin.
  • S/N 511G2194
• Sun 595-3067 External 2 GB 4mm Tape Drive:
  • Sun Model 411 "Desktop" enclosure
  • Sun 370-1571 tape drive
    • Archive Python model 4324RP DDS-DC "Turbo"
  • S/N 451G3633
• Sun 595-1711 External 150 MB QIC Tape Drive:
  • Sun Model 411 "Desktop" enclosure
  • Sun 370-1218 tape drive
    • Archive Viper model 2150S
  • S/N 007G0294
• Sun 595-1711 External 150 MB QIC Tape Drive:
  • Sun Model 411 "Desktop" enclosure
  • Sun 370-1218 tape drive
    • Archive Viper model 2150S
  • S/N 230G0562
• Sun 595-1711 External 150 MB QIC Tape Drive:
  • Sun Model 411 "Desktop" enclosure
  • Sun 370-1218 tape drive
    • Archive Viper model 2150S
  • S/N 238G0670

Software Installed:

• Solaris 2.5.1
• Desktop 1.1 (CDE 1.0.2)