Notes

1. Part number 501-2924 is a new board with MSBI Version 3.
2. Part number 501-2961 is a repaired 501-2324 with MSBI Version 3.

When Pins 1-2 on J1401 are jumpered, the MBus speed is set to 40MHz.

When Pins 2-3 on J1401 are jumpered, the MBus speed is selected by the module installed in MBus 0. The MBus speed of the SM50 is 50MHz. The MBus speed of the SM51 is 40MHz. The MBus speed of the SM61 is 50MHz.

JUMPER PINS SETTING DESCRIPTION J0801 J0802 J0801 J0802 1-2 1-2 2-3 2-3 In In In* In* Select RS-232 (+12V) Select RS-232 (-12V) Select RS-423 Select RS-423 J0805 J0806 J0805 J0806 1-2 1-2 1-2 1-2 Out* Out* In In Port B asynchronous Port B asynchronous Port B synchronous Port B synchronous J1401 1-2 2-3 In In* 40MHz MBus 40/50MHz MBus J1601 1-2 N/A Ground test point J1602 1-2 N/A Ground test point J1603 1-2 N/A Ground test point J1703 1-2 Out Test point tpe<3> J1704 1-2 Out Test point tpe<2> J1705 1-2 Out Test point tpe<1> J1706 1-2 Out Test point tpe<0> J1707 1-2 Out Test point edgeon

*   Default setting Requires an adapter that is not available from Sun

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SPARCstation 20

SS20 / Netra i20 / Netra s20 / Netra i600 / Netra i625

501-2324	501-2924	501-2961
0MB FRU w/o MBus Module MSBI Version 0 - 3	0MB FRU w/o MBus Module MSBI Version 3	0MB FRU w/o MBus Module MSBI Version 3

*   This installation sequence does not match the bank order. *    SS20 Service Manual, 801-6189. This installation order matches the bank order. SS20 DSIMM Installation, 801-6185. SS10SX and SS20 System Configuration Guide, 801-7287.

Notes

1. Part number 501-2924 is a new board with MSBI Version 3.
2. Part number 501-2961 is a repaired 501-2324 with MSBI Version 3.

When Pins 1-2 on J1401 are jumpered, the MBus speed is set to 40MHz.

When Pins 2-3 on J1401 are jumpered, the MBus speed is selected by the module installed in MBus 0. The MBus speed of the SM50 is 50MHz. The MBus speed of the SM51 is 40MHz. The MBus speed of the SM61 is 50MHz.

JUMPER PINS SETTING DESCRIPTION J0801 J0802 J0801 J0802 1-2 1-2 2-3 2-3 In In In* In* Select RS-232 (+12V) Select RS-232 (-12V) Select RS-423 Select RS-423 J0805 J0806 J0805 J0806 1-2 1-2 1-2 1-2 Out* Out* In In Port B asynchronous Port B asynchronous Port B synchronous Port B synchronous J1401 1-2 2-3 In In* 40MHz MBus 40/50MHz MBus J1601 1-2 N/A Ground test point J1602 1-2 N/A Ground test point J1603 1-2 N/A Ground test point J1703 1-2 Out Test point tpe<3> J1704 1-2 Out Test point tpe<2> J1705 1-2 Out Test point tpe<1> J1706 1-2 Out Test point tpe<0> J1707 1-2 Out Test point edgeon

*   Default setting Requires an adapter that is not available from Sun

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System Board Backpanel and Connectors

Notes

1. The minimum operating system is Solaris 2.3 or Solaris 1.1.1 Revision B.
2. Use SIMMs 501-2479 (16MB), 501-2622 (32MB), and 501-2480 (64MB).
3. Install Solaris 2.3 Patch >=101318-34 when:
   One 32MB SIMM is mixed with seven 16 or 64MB SIMMs
   Two 32MB SIMMs are mixed with five or more 16 or 64MB SIMMs
   Three 32MB SIMMs are mixed with three or more 16 or 64MB SIMMs
   Four 32MB SIMMs are mixed with one or more 16, 32, or 64MB SIMMs.
4. Use the sxconfig (1M) command to configure contiguous memory.
5. Do NOT mix SPARC modules of different types or speeds.
6. The 100MHz and 125MHz hyperSPARC Modules require OBP 2.19.
7. SuperSPARC II Modules require Boot PROM 2.22.
8. The 150MHz hyperSPARC Module requires OBP 2.25.

ZX and TurboZX Notes

1. Poor performance may occur when running XGL applications with the ZX and TurboZX frame buffers on system boards with MSBI Versions 0, 1, and 2. Refer to BugID 1173967 and FCO A0073.
2. Use the .attributes OBP command or the prtconf -vp Unix command to determine the MSBI Version.
   

   ok cd /iommu

   ok .version

   Implementation: 00000001

   Version: 00000000 or 00000001 or 00000002 or 00000003

References

1. SPARCstation 20 Service Manual, 801-6189.
2. SS20 DSIMM Installation, 801-6185.
3. SS10SX and SS20 System Configuration Guide, 801-7287.