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SPARCstation 20 / Ross HyperSPARC 150 MHz

Pictures

SPARCstation 20 - Front view SPARCstation 20 - Back view SPARCstation 20 - Back view, connectors SPARCstation 20 - Perspective view SPARCstation 20 - Opened, main unit and cover SPARCstation 20 - Opened, main unit view 1 SPARCstation 20 - Opened, main unit view 2 SBUS cgsix and MBUS Ross HyperSPARC 150 CPU, top view SBUS cgsix and MBUS Ross HyperSPARC 150 CPU, bottom view SPARCstation 20 - Motherboard, top view SPARCstation 20 - Motherboard, bottom view SPARCstation 20 - Casing, without motherboard

Notes

Specifications

CPU MBUS Module - 150MHz Ross HyperSPARC RT620/RT626 Colorado3 - 512K external cache (sun4m)
Memory 224 MB (max 512 MB - 8 x 16, 32 or 64 MB parity DSIMMs)
[2 slot can be reused for a 4 or 8 MB VSIMM
[1st VSIMM for use with the integrated video output]
[2nd VSIMM must be used in conjunction with an SS20 auxiliary video board]
Bus MBUS at 50 MHz - 2 slot [up to 4 CPU, OpenBSD support only 1 CPU configuration]
SBUS at 25 MHz - 4 slot
Video internal cg14 framebuffer (8 or 24 bit colors, depends on available memory and resolution) activated only when first VSIMM is installed
SBUS CG6 - 8 bit color accelarated framebuffer
Sound onboard ISDN/audio combined chipset. (not supported in OpenBSD)
Disk Controller onboard NCR 53c94 SCSI-2 narrow
internal 50 pin narrow flat cable male connector for CD-ROM
internal SCA-2 (80 pin) backplane for 2 hard-drive
external 50 pin HD narrow female connector
Case Sun Aurora Chassis
1 x 3.5 inch floppy drive
1 x non-standard height SCSI-2 50 pin narrow male connector CD-ROM [not in the pictures]
2 x half-height SCSI-2 SCA 80 pin female connector hard-drive
External Connectors SPARCstation 20 numeroted connectors picture
  1. Female 13W3 Sun video connector [Internal framebuffer, activated only when first VSIMM installed]
  2. Serial port A and B - DB25 female connector [port A wired as standard DTE, port B isn't]
  3. Sun keyboard/mouse 8 pin mini-DIN connector
  4. Printer Port - HD 26 pin female connector [non-standard]
  5. Ethernet AUI Sun connector - HD 26 pin female connector
  6. Ethernet 10baseT RJ connector
  7. SCSI-2 narrow - HD 50 pin female connector
  8. Headset - 1/8 inch stereo
  9. Microphone - 1/8 inch stereo
  10. Audio in - 1/8 inch stereo
  11. Audio out - 1/8 inch stereo
  12. Female 13W3 Sun video connector [SBUS card]

Dmesg

OpenBSD 5.6-stable (GENERIC) #2: Mon Dec  1 16:20:42 EST 2014
    root@ss20.EINTR.net:/usr/src/sys/arch/sparc/compile/GENERIC
real mem = 234319872 (223MB)
avail mem = 225472512 (215MB)
mainbus0 at root: SUNW,SPARCstation-20
cpu0 at mainbus0: RT620/625 @ 150 MHz, on-chip FPU
cpu0: 512K byte write-back, 32 bytes/line, sw flush cache enabled
obio0 at mainbus0
clock0 at obio0 addr 0xf1200000: mk48t08 (eeprom)
timer0 at obio0 addr 0xf1300000: delay constant 48, frequency 2000000 Hz
zs0 at obio0 addr 0xf1100000 pri 12, softpri 6
zstty0 at zs0 channel 0: console
zstty1 at zs0 channel 1
zs1 at obio0 addr 0xf1000000 pri 12, softpri 6
zskbd0 at zs1 channel 0: no keyboard
zsms0 at zs1 channel 1
wsmouse0 at zsms0 mux 0
fdc0 at obio0 addr 0xf1700000 pri 11, softpri 4: chip 82077
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
auxreg0 at obio0 addr 0xf1800000
power0 at obio0 addr 0xf1a01000
cgfourteen0 at obio0 addr 0x9c000000 pri 8: 8MB, rev 3.0, 1152x900
wsdisplay0 at cgfourteen0 mux 1
wsdisplay0: screen 0 added (std, sun emulation)
iommu0 at mainbus0 ioaddr 0xe0000000: version 0x1/0x1, page-size 4096, range 64MB
sbus0 at iommu0: 25 MHz
dma0 at sbus0 slot 15 offset 0x400000: rev 2
esp0 at dma0 offset 0x800000 pri 4: ESP200, 40MHz
scsibus0 at esp0: 8 targets, initiator 7
sd0 at scsibus0 targ 3 lun 0: <SEAGATE, ST373455LC, 0003> SCSI3 0/direct fixed naa.5000000000000000
sd0: 70007MB, 512 bytes/sector, 143374744 sectors
cd0 at scsibus0 targ 6 lun 0: <TOSHIBA, XM-4101TASUNSLCD, 1084> SCSI2 5/cdrom removable
ledma0 at sbus0 slot 15 offset 0x400010: rev 2
le0 at ledma0 offset 0xc00000 pri 6: address 08:00:20:23:6b:8e
le0: 16 receive buffers, 4 transmit buffers
bpp0 at sbus0 slot 15 offset 0x4800000: DMA2
"SUNW,DBRIe" at sbus0 slot 14 offset 0x10000 not configured
cgsix0 at sbus0 slot 2 offset 0x0 pri 9: SUNW,501-2325, 1152x900, rev 11
wsdisplay1 at cgsix0 mux 1
wsdisplay1: screen 0 added (std, sun emulation)
vscsi0 at root
scsibus1 at vscsi0: 256 targets
softraid0 at root
scsibus2 at softraid0: 256 targets
bootpath: /iommu@f,e0000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000/sd@3,0
root on sd0a (9794594d03d23d76.a) swap on sd0b dump on sd0b

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(c) Hugo Villeneuve
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