SVGA Adapters With Cirrus GD542x

Japanese SVGA CL-GD5428 1MB 84G7001 For 5521-Y
   2MB Upgrade
   Layout around LM334
   917A.ADF

Reply Video Board CL-GC5426 1MB
   Layout Around LM334
   8182.ADF

1MB SVGA CL-GD5428 for Server 95/500 FRU 71G0650
   917B.ADF

Pin Assignment of 256K x 16 SOJ DRAM


CL5428 SVGA/A Adapter ID 917A  [P]
P/N 84G7001, EC No. D43621, FRU 84G7001.
Silk marked as "IGH0879BA SVGA CARD, IBI, M4V0".


 U1      CL-GD5428-80QC-A
 U6      PALCE22V10H (  dated 3/4/94 )
 U7,8   SOJ DRAM  TC514260BJ-70 *1
 U9,10  Solder pads for additional VRAM
 U12    84G7129   M5M27C256AFP  ( BIOS  ? )
 U11    LM334
 C15    Capacitor ( 10/25A/40B )
 J1      Video Connector

 *1 For SOJ DRAM chips, See below
 

Originally equipped in 5521-YSB/YWB. Not available as an OBI. This adapter is Flicker Free.
Ready to upgrade to 2MB ( but you need soldering work ).   Just solder SOJ DRAM chips at the solder pads.
Each pin # 14 of solder pads for additional VRAMs  are already connected to pin # 141 of CL5428 through 100 ohms resistor which is marked "R26".
Value printed atop of the resistor is "101".   Reply Video Board  uses 33 ohms resistor for this connection.

   Click here for  Adapter BIOS ROM.
 

Win9x built-in driver can detect 2MB and provide 1024 x768 16bit mode ( if  the system property is  correct ).    NT4 can detect only 1MB of VRAM even if you have 2MB installed. 

   SOJ Chips ;   Following chips are used for CL SVGA adapters.
     Micron    MT4C16257DJ-6
     NEC       42S4260-70 
     Toshiba  TC514260BJ-70
     Hitachi   HM514260DJ-6
     OKI        M514260ASL-70J

     and more...See bottom of this section.
 

Layout around GD5428 and LM334  ( PLease compare with Server SVGA CL5428 )

@917A.ADF .... Really simple . Isn't it?
 ---------------------------------------------------------------------------
AdapterId 0917AH

AdapterName "SVGA CL-28 Adapte /A"

NumBytes 1

FixedResources
       pos[0]=XXXXXXXXb
       mem 0c0000h-0c7fffh 

------------------------------------------------------------------------------



Reply Video Board ( CL-GD5426 ) [P]( pumped up to 2MB ) 
 

 U1      CL-GD5426-80QC-A
 U2, 3  SOJ DRAM  MT41167257DJ-6 ( on mine )
 U4, 5  Solder pads for additional VRAM
 U6      LM334
 C19    Capacitor  336/16K/221
 U7      BIOS
 U11    PALCE22
 U12    PALCE16V
 U14    GAL 16V8B
 J1       Video Connector

 For detailed information, Click here.
 Drivers for DOS/Win3.1 are available here.
 Win9x/NT have builtin drivers. 
 Win9x builtin driver can detect 2MB and provide 1024 x768 16bit mode ( if  the system property is  correct ). 
 NT4 can detect only 1MB of VRAM even if additional 1MB have been installed. 

Layout Around GD5426 and LM334

@8182.ADF REPLY CL26
---------------------------------------------------------------------
AdapterId 08182H

AdapterName  "REPLY VIDEO ADAPTER"

NumBytes 1

NamedItem
 Prompt "CARD ENABLE"
      choice "card enable"  pos[0]=XXXXxxx1b  mem 0c0000h-0c7fffh

   Help
"Call tech support"
--------------------------------------------------------------------


1MB SVGA Adapter CL-GD5428 [P]
  FRU P/N 71G0650,  P/N 06H6917 With Delivery Boys marking.  Adapter ID is 917B. 
 

 U1   CL-GD5428-80QC-A
 U2   74F244D
 U3   06H2194
 U5   74F373D
 U6   74F373D
 U7   NEC-42S4260-70  or it's equivalents 
 U8   NEC-42S4260-70
 U9   LM334
 C31 Capaciotr ( soldered reversed position.. by what reason) 

I thought this one was  really a "BAD" MCA adapter IBM had ever made.   Probably the adapter worked *fine* when it was new.  But after several months ( or years ) of running in a system,  it became  very flikery.  All of 1MB SVGA /A in my  hands give me  "Sandstorm"  on my display.  And actually IBM might make mistake. 


         Peter Wendt found "wrong orientation" of a capacitor C31
Click here for the solution of "Sandstorm" disease.  The page is an updated Louis's 1MB SVGA page mirrored by David L Beem.   I'd like to quote Louis's outline ( a little bit modified by me ) to compare Japanese CL-GD5428 SVGA and Reply SVGA .
For electrical explanation, please read Peter's investigation and testing reports by David L.Beem and Jim Shorney stored  in  above mentioned page
 

  Note : Outlines of  71GG0650 were originaly created d by Louis Ohland
A)  Remove the C31 capacitor and replace it to
     newer one  with same capacitance ( 2.2uF 16V
     to 20V ) in REVERSE orientation like Fig. left.
     This rework is electrically equal to Reply SVGA
     layout. 

B)  Or remove the capacitor C31. 

 


 

 And, Untested horrible thought. 

2MB Hacking
Please reffer to this page mirrored by David L. Beem.  ( Seems nobody succeeded yet )

@917B.ADF  5428 SVGA For Server500
-----------------------------------------------------------------------
AdapterId 0917bh

AdapterName "SVGA Adapter"

NumBytes 1

FixedResources
  pos[0]=XXXXXXXXb

Begin Device 03h

NamedItem Prompt "ROM Address"
   choice "C0000h-C7FFFh" 
      pos[0]=xxxxxxxxb mem 0C0000h - 0C7FFFh

Help
   "This is the address range for the video adapter. This address cannot be changed"

End
.
------------------------------------------------------------------------------



SOJ DRAM Pin Assignment
 Peter Wendt wrote to the PS/2 News Group on 2002.03.01.
 Chips listed below are commonly used for PC750, PC720 ( Japanese Desktop PC ) and Reply PowerBoard.

    For those that cannot locate a pinout on the 256K x 16 DRAMs:

+--------------------------------------------------------------------+
|                                                                    |
|                           Pin Assignment                           |
|                           256K x 16 DRAM                           |
|                            (40 Pin SOJ)                            |
|                                                                    |
|--------------------------------------------------------------------+
|    Fujitsu     MB 814260                  Goldstar    GM 71C4260   |
|    Hitachi     HM 514260                  Hyundai     HY 514260    |
|    Micron      MT 4C16257                 Mitsubishi  M5M 44260    |
|    Motorola    MCM 54260                  NEC         UPD 424260   |
|    OKI         MSM 514260                 Samsung     KM 416C256   |
|    Texas Inst. TI 45160                   Toshiba     TC 514260    |
|--------------------------------------------------------------------+
|                                                                    |
|                                                                    |
|                           /--------------+                         |
|                    Vcc  --+o 1        40 +-- Vss                   |
|                    DQ1  --+  2        39 +-- DQ16                  |
|                    DQ2  --+  3        38 +-- DQ15                  |
|                    DQ3  --+  4        37 +-- DQ14                  |
|                    DQ4  --+  5        36 +-- DQ13                  |
|                    Vcc  --+  6        35 +-- Vss                   |
|                    DQ5  --+  7        34 +-- DQ12                  |
|                    DQ6  --+  8        33 +-- DQ11                  |
|                    DQ7  --+  9        32 +-- DQ10                  |
|                    DQ8  --+ 10        31 +-- DQ9                   |
|                    nc   --+ 11        30 +-- nc                    |
|                    nc   --+ 12        29 +-- CASL#                 |
|                    WE#  --+ 13        28 +-- CASH#                 |
|                    RAS# --+ 14        27 +-- OE#                   |
|                    nc   --+ 15        26 +-- A8                    |
|                    A0   --+ 16        25 +-- A7                    |
|                    A1   --+ 17        24 +-- A6                    |
|                    A2   --+ 18        23 +-- A5                    |
|                    A3   --+ 19        22 +-- A4                    |
|                    Vcc  --+ 20        21 +-- Vss                   |
|                           +--------------+                         |
|                                                                    |
|                           Vcc = +5V DC                             |
|                           Vss =  0V DC (GND)                       |
|                                                                    |
|                Signal marked with # are active LOW !               |
|                                                                    |
|                                                                    |
|     (Source: Micron Technology Inc. Datasheet - ASCII Art by PHW)  |
|                                                                    |
|                                                                    |
+--------------------------------------------------------------------+


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