MVS cart pinout
kindly submitted by Apollo69 (apollo69@columbus.rr.com)
=================================================================
             CTRG1                            CTRG2
=================================================================
     GND = 01A | 01B = GND            GND = 01A | 01B = GND
     GND = 02A | 02B = GND            GND = 02A | 02B = GND
      P0 = 03A | 03B = P1             GND = 03A | 03B = GND
      P2 = 04A | 04B = P3             GND = 04A | 04B = GND
      P4 = 05A | 05B = P5              D0 = 05A | 05B = A1
      P6 = 06A | 06B = P7              D1 = 06A | 06B = A2
      P8 = 07A | 07B = P9              D2 = 07A | 07B = A3
     P10 = 08A | 08B = P11             D3 = 08A | 08B = A4
     P12 = 09A | 09B = P13             D4 = 09A | 09B = A5
     P14 = 10A | 10B = P15             D5 = 10A | 10B = A6
     P16 = 11A | 11B = P17             D6 = 11A | 11B = A7
     P18 = 12A | 12B = P19             D7 = 12A | 12B = A8
     P20 = 13A | 13B = P21             D8 = 13A | 13B = A9
     P22 = 14A | 14B = P23             D9 = 14A | 14B = A10
   PCK1B = 15A | 15B = 24M            D10 = 15A | 15B = A11
   PCK2B = 16A | 16B = 12M            D11 = 16A | 16B = A12
     2H1 = 17A | 17B = 8M             D12 = 17A | 17B = A13
     CA4 = 18A | 18B = RESET          D13 = 18A | 18B = A14
     CR0 = 19A | 19B = CR1            D14 = 19A | 19B = A15
     CR2 = 20A | 20B = CR3            D15 = 20A | 20B = A16
     CR4 = 21A | 21B = CR5            R/W = 21A | 21B = A17
     CR6 = 22A | 22B = CR7             AS = 22A | 22B = A18
     CR8 = 23A | 23B = CR9         ROMOEU = 23A | 23B = A19
    CR10 = 24A | 24B = CR11        ROMOEL = 24A | 24B = 68KCLKB
    CR12 = 25A | 25B = CR13       PORTOEU = 25A | 25B = ROMWAIT
    CR14 = 26A | 26B = CR15       PORTOEL = 26A | 26B = PWAIT0
    CR16 = 27A | 27B = CR17       PORTWEU = 27A | 27B = PWAIT1
    CR18 = 28A | 28B = CR19       PORTWEL = 28A | 28B = PDTACT
     VCC = 29A | 29B = VCC            VCC = 29A | 29B = VCC
     VCC = 30A | 30B = VCC            VCC = 30A | 30B = VCC
     VCC = 31A | 31B = VCC            VCC = 31A | 31B = VCC
     VCC = 32A | 32B = VCC            VCC = 32A | 32B = VCC
    CR20 = 33A | 33B = CR21      PORTADRS = 33A | 33B = 4MB
    CR22 = 34A | 34B = CR23            NC = 34A | 34B = ROMOE
    CR24 = 35A | 35B = CR25            NC = 35A | 35B = RESET
    CR26 = 36A | 36B = CR27            NC = 36A | 36B = NC
    CR28 = 37A | 37B = CR29            NC = 37A | 37B = NC
    CR30 = 38A | 38B = CR31            NC = 38A | 38B = NC
      NC = 39A | 39B = FIX00           NC = 39A | 39B = NC
      NC = 40A | 40B = FIX01           NC = 40A | 40B = NC
      NC = 41A | 41B = FIX02           NC = 41A | 41B = SDPAD0
 SYSTEMB = 42A | 42B = FIX03      SYSTEMB = 42A | 42B = SDPAD1
    SDA0 = 43A | 43B = FIX04        SDPA8 = 43A | 43B = SDPAD2
    SDA1 = 44A | 44B = FIX05        SDPA9 = 44A | 44B = SDPAD3
    SDA2 = 45A | 45B = FIX06       SDPA10 = 45A | 45B = SDPAD4
    SDA3 = 46A | 46B = FIX07       SDPA11 = 46A | 46B = SDPAD5
    SDA4 = 47A | 47B = SDRD0       SDPMPX = 47A | 47B = SDPAD6
    SDA5 = 48A | 48B = SDRD1        SDPOE = 48A | 48B = SDPAD7
    SDA6 = 49A | 49B = SDROM        SDRA8 = 49A | 49B = SDRA00
    SDA7 = 50A | 50B = SDMRD        SDRA9 = 50A | 50B = SDRA01
    SDA8 = 51A | 51B = SDDO        SDRA20 = 51A | 51B = SDRA02
    SDA9 = 52A | 52B = SDD1        SDRA21 = 52A | 52B = SDRA03
   SDA10 = 53A | 53B = SDD2        SDRA22 = 53A | 53B = SDRA04
   SDA11 = 54A | 54B = SDD3        SDRA23 = 54A | 54B = SDRA05
   SDA12 = 55A | 55B = SDD4        SDRMPX = 55A | 55B = SDRA06
   SDA13 = 56A | 56B = SDD5         SDROE = 56A | 56B = SDRA07
   SDA14 = 57A | 57B = SDD6           GND = 57A | 57B = GND
   SDA15 = 58A | 58B = SDD7           GND = 58A | 58B = GND
     GND = 59A | 59B = GND            GND = 59A | 59B = GND
     GND = 60A | 60B = GND            GND = 60A | 60B = GND

CTRG1 = Graphics Roms, S1, M1
CTRG2 = Program Roms, Sound Roms

NOTE: On CTRG2-B, The "A" lines start at "A1". If you trace this on an
      actual cart, you will see that this is actually "A0" (A0 - A18).

      These are from a very hard to read copy of the schematics, so
      I hope that I got the pin names correct. 

      Apollo69 10/19/99