AST RESEARCH TECHNICAL BULLETIN TB-0004B                  3-19-85


        D-RAM CHIP COMPATIBILITY FOR MULTIFUNCTION CARDS


The  following is a list of 64K and 256K RAM Integrated  Circuits 
recommended  by  AST  for use with AST  Products.   The  products 
covered  in  this  list are:   SixPakPlus,  Advantage!,  jrCombo,  
MP Mini, MegaPlus II, ComboPlus and MP II.

The  following  64K D-RAMS are recommended for the  MegaPlus  II, 
MP  Expansion,  and  ComboPlus.   The SixPakPlus (Revision  D  or 
earlier) also uses the same D-RAMS.

               VENDOR              PART NUMBER
                                   
               AMD                 AM9064-20PC
               Hitachi             HM4864P-3
               Fujitsu             MB8264-20M
               Intel               P2164A-20
               Micron              MT4264N-3 or -20
               Mitsubishi          M5K4164NP-20
               Mostek              MK456N-20
               Motorola            MCM6665AP20 or ...BP20
               NEC                 UPD4164C-2
               OKI                 MSM3764-2 or S
               TI                  TMS4164-20NL
               Toshiba             TMMS4164-20NL
               Toshiba             TMM4164AP-20

The following 64K D-RAMS are recommended for the jrCombo, MP Mini 
and  MP II.   The SixPakPlus (Revision E or later) also uses  the 
same D-RAMS.

               VENDOR              PART NUMBER

               AMD                 AM9064-15PC
               Hitachi             HM4864P-2
               Fujitsu             MB8264-15M
               Intel               P2164A-15
               Micron              MT4264N-2 or -15
               Mitsubishi          M5K4164NP-15
               Mostek              MK4564N-15
               Motorola            MCM6665AP15 or ...BP15
               NEC                 UPD4164C-3
               OKI                 MSM3764-15RS
               TI                  TMS4164-15NL
               Toshiba             TMM4164P-3
               Toshiba             TMM4164AP-15
               AMD                 AM9064-20PC
               Hitachi             HM4864P-3
               Fujitsu             MB8264-20M
               Intel               P2164A-20
               Micron              MT426N-3 or -20
               Mitsubishi          M5K4164NP-20
               Mostek              MK456N-20
               Motorola            MCM6665AP20 or ...BP20
               NEC                 UPD4164C-2
               OKI                 MSM3764-20RS
               TI                  TMS4164-20NL
               Toshiba             TMM4164P-4
               Toshiba             TMM4164AP-20

The following 64K D-RAMS are recommended for the Advantage!:

               VENDOR              PART NUMBER

               AMD                 AM9064-15PC
               Hitachi             HM4864P-2
               Fujitsu             MB8264-15M
               Intel               P2164A-15
               Micron              MT4264N-2 or -15
               Mitsubishi          M5K416NP-15
               Mostek              MK456N-15
               Motorola            MCM6665AP15 or ...BP15
               NEC                 UPD4164C-3
               OKI                 MSM3764-15RS
               TI                  TMS4164-15NL
               Toshiba             TMM4164P-3
               Toshiba             TMM4164AP-15

The following 256K D-RAMS are recommended for the Advantage!  and 
jrCombo:

               VENDOR              PART NUMBER

               Hitachi             HM50256P-15
               TI                  TMS4256-15NL
               AT & T              WCM41256FX-20

AST further recommends that the speed of the D-RAMS,  measured in 
nanoseconds should NOT be mixed on the same board.