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Thread: NEO MVH-MV4 no sound on slot 4 only.

  1. #1
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    NEO MVH-MV4 no sound on slot 4 only.

    I spent the past few days working through this problem, but still not sure why it has no audio.

    What I do know is the Z80 pin 22 WR is HIGH and the NMI (17) and INT (16) are low. all 8 data lines are stuck as well as address lines 8>15.

    I have checked the 245 and 244 chips on the top and I can see they are passing the correct data when the other slots are working. I have removed these chips, tested them and put sockets in. All connections are ok.

    Connections from the cartridge are also ok.

    sdmrd looks good, but sdrom and sdrd0 also stop pulsing.

    I ran the diagnostic bios with the m1 chip and it says z80 dead or expected was not the correct data.

    I checked the as244 and 245 on the lower board. the ls32, ls139, ls257 x 2 and these are ok.

    I have not checked the 6116 ram, but its ok with the other slots.

    so when a cart is in slot 4, data and half the address bus just stop, but i am not sure what to check next.

  2. #2
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    My notes show the z80 data lines (SDD0-7) on slot 4 goto the 245 chip @ P5. Have you verified that gets enabled and the other slots 245's for SDD0-7 get disabled?

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    Quote Originally Posted by ack View Post
    My notes show the z80 data lines (SDD0-7) on slot 4 goto the 245 chip @ P5. Have you verified that gets enabled and the other slots 245's for SDD0-7 get disabled?
    Yes it was one of the first things I checked. Enable is low and dir (pin 1) is pulsing with data. all of the other 3 245 are high I just double checked this, that is why I took a few days to reply. All of the 244 are also enabled on pins 1 and 19.

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    I spent a bit more time on this and setup slot 1 and 4 with game carts so I could probe and look for changes. As soon as I startup up slot 4 the sound stops, but it then never works again so when I go back to slot 1 the sound is still not working. I am 100% sure it's not something on the top board. I have checked and probed just about evertying with regards to the slot connections and all chips around slot 4. All the 153 and 253 chips are seeing the data to say what slot is working and they are not showing anything when the sound stops. the 138 in the bottom left is also seeing the two bit binary and decoding to 4 seperate lines.

  5. #5
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    Its likely the slot 4 issue is crashing the z80, which causes other slots to stop working. Its my understanding that the only slot specific lines coming from the cpu board are going to that 138, which then is responsible for enabling the correct 245s and picking the right inputs on the 253s for output. The address and data lines going from the cpu to/from slot board should all be shared among the slots and its just the 245s/253s which dictate which slot's data lines are enabled.

    Its unclear to me what would cause a slot specific sound issue on the cpu board if the other slots are working and the 138 looks right. Best I could suggest is removing the cart shell and logic probing the M1 chip from the solder side of the CHA board while plugged into slot 4. Perhaps that will give some additional insight.

    If you haven't done so, you should also try clearing your backup ram. Sometimes that can fix sound issues, but I have only heard of that when the sound issue is effecting all slots.

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    Quote Originally Posted by ack View Post
    Its likely the slot 4 issue is crashing the z80, which causes other slots to stop working. Its my understanding that the only slot specific lines coming from the cpu board are going to that 138, which then is responsible for enabling the correct 245s and picking the right inputs on the 253s for output. The address and data lines going from the cpu to/from slot board should all be shared among the slots and its just the 245s/253s which dictate which slot's data lines are enabled.

    Its unclear to me what would cause a slot specific sound issue on the cpu board if the other slots are working and the 138 looks right. Best I could suggest is removing the cart shell and logic probing the M1 chip from the solder side of the CHA board while plugged into slot 4. Perhaps that will give some additional insight.

    If you haven't done so, you should also try clearing your backup ram. Sometimes that can fix sound issues, but I have only heard of that when the sound issue is effecting all slots.
    I have done all of that. The M1 chip has stuck data lines and it goes all the way back to the z80 like I said in the first post. I cleared the Ram after I Upgraded the unibios to 3.3. The z80 is 100% crashed I am sure.
    Last edited by leejsmith; 07-20-2019 at 02:58 PM.

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    ok, I have my scopt setup and looking at the pins of the z80.
    Slot 1 has puzzle bobble and slot 4 turf master. I am going to switch between slot 1 and 4 and look at the control lines of the z80.


    IORQ WITH SOUND = LOW
    RW WITH SOUND = CHANGING DATA PULSE

    IORQ NO SOUND = LOW
    RW NO SOUND = CONSTANT HI LO DATA, BUT NO CHANGE.

    MREQ SOUND = CHANGING DATA
    WR SOUND = CHANING DATA ONLY A SMALLA MOUNT MAINLY HIGH

    MREQ NO SOUND = LOOKS LIKE HI,HI LOW WITH NO CHANGE
    WR NO SOUND = ALWAYS HI

    HALT SOUND = HIGH
    BUSAK SOUND = HIGH

    HALT NO SOUND = LOW
    BUSAK NO SOUND = HIGH

    NMI SOUND = HIGH
    WAIT SOUND = HIGH

    NMI NO SOUND = LOW
    WAIT NO SOUND = HIGH

    INT SOUND = HIGH WITH LOW PULSES
    BUSRQ SOUND = HIGH

    INT NO SOUND = LOW
    BUSRQ = HIGH

    D1 SOUND = CHANGING DATA
    RESET SOUND = HIGH

    D1 NO SOUND = HIGH
    RESET NO SOUND = HIGH

    D1 BOING BACK TO SOUND = LOW TRIANGLUAR WAVE

    D0 SOUND = CHANGING DATA
    M1 SOUND = FIXED DATA PULSE HI,LO,HI,LO,HI,HI,HI,HI

    D0 NO SOUND = HI
    M1 NO SOUND = FIXED DATA HI,LO

    D7 SOUND = CHANGING DATA
    RFSH = FIXED DATA PULSE HI,LO,HI,LO,HI,HI,HI,HI

    D7 NO SOUND = LOW
    RFSH NO SOUND = FIXED DATA HI,LO

  8. #8
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    This is how far I got with tracking the pins of the z80.

    Capture.PNG

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    looking at the signals that come into the z80

    INT,NMI,RESET,BUSRQ and WAIT

    INT and NMI both go low when the sound stops. The other three stay high and do not change.

    NMI goes to the 74ls pin 5 and the INT goes to the Yamaha pin 56 IRQ.

  10. #10
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    From a Z80 guide

    Some of the Z80's control pins must also be set for the CPU to run.
    Specifically, pin 16 (INT), 17 (NMI), 24 (WAIT), and 25 (BUSRQ) should be
    connected directly to the positive end of the power supply. Because these
    pins are all active-low (meaning they take effect when their input voltage is
    low, and are disabled when the input voltage is high), this will turn them
    off. (If they are left on, they may interfere with the CPU and stop it from
    running.)

  11. #11
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    These are my notes for z80 on MV4.


    Code:
    Z80:
    01 A11  <=> PIN 06 on AS244 @ R1 and PIN 01 on LS11 @ M3 and PIN 25 on SM1 @ P2
    02 A12  <=> PIN 15 on AS244 @ R1 and PIN 02 on LS11 @ M3 and PIN 04 on SM1 @ P2
    03 A13  <=> PIN 04 on AS244 @ R1 and PIN 13 on LS11 @ M3 and PIN 28 on SM1 @ P2
    04 A14  <=> PIN 17 on AS244 @ R1 and PIN 04 on LS11 @ M3 and PIN 29 on SM1 @ P2
    05 A15  <=> PIN 04 on AS244 @ R1 and PIN 05 on LS11 @ M3 and PIN 03 on SM1 @ P2
    06 CLK  <=> PIN 14 on LS368 @ B4 and PIN 112 on LSCP-A0
    07 D4   <=> PIN 18 on SM1   @ P2 and PIN 14 on RAM  @ L1 and PIN 06 on YM2610   and PIN 46 on PRO-B0
    08 D3   <=> PIN 17 on SM1   @ P2 and PIN 13 on RAM  @ L1 and PIN 05 on YM2610   and PIN 45 on PRO-B0
    09 D5   <=> PIN 19 on SM1   @ P2 and PIN 15 on RAM  @ L1 and PIN 07 on YM2610   and PIN 47 on PRO-B0
    10 D6   <=> PIN 20 on SM1   @ P2 and PIN 16 on RAM  @ L1 and PIN 08 on YM2610   and PIN 48 on PRO-B0
    11 VCC  <=> 5V
    12 D2   <=> PIN 15 on SM1   @ P2 and PIN 11 on RAM  @ L1 and PIN 04 on YM2610   and PIN 44 on PRO-B0
    13 D7   <=> PIN 21 on SM1   @ P2 and PIN 17 on RAM  @ L1 and PIN 09 on YM2610   and PIN 49 on PRO-B0
    14 D0   <=> PIN 13 on SM1   @ P2 and PIN 09 on RAM  @ L1 and PIN 02 on YM2610   and PIN 42 on PRO-B0
    15 D1   <=> PIN 14 on SM1   @ P2 and PIN 10 on RAM  @ L1 and PIN 03 on YM2610   and PIN 43 on PRO-B0
    16 INT  <=> PIN 56 on YM2610
    17 NMI  <=> PIN 05 on LS74  @ K1
    18 HLT  <=> PIN ??
    19 MREQ <=> PIN 05 on LS32  @ N3 and PIN 10 on LS32 @ N3 and PIN 09 on AS32  @ R6
    20 IORQ <=> PIN 02 on LS32  @ N3 and PIN 13 on LS32 @ N3
    21 RD   <=> PIN 04 on LS32  @ N3 and PIN 12 on LS32 @ N3 and PIN 17 on AS244 @ R3
    22 WR   <=> PIN 01 on LS32  @ N3 and PIN 09 on LS32 @ N3
    23 BACK <=> PIN ??
    24 WAIT <=> PIN 25 on Z80        and 4.7K resist    @ N2
    25 BREQ <=> PIN 24 on Z80        and 4.7K resist    @ N2
    26 RST  <=> PIN 09 on LS08  @ K2 and PIN 10 on LS74 @ K1 and PIN 33 on YM2610 and PIN 38 on PRO-C0
    27 M1   <=> PIN ??
    28 RFSH <=> PIN ??
    29 GND  <=> GND
    30 A0   <=> PIN 11 on AS244 @ P1 and PIN 08 on RAM @ L1 and PIN 12 on SM1 @ P2 and PIN 60 on YM2610
    31 A1   <=> PIN 08 on AS244 @ P1 and PIN 07 on RAM @ L1 and PIN 11 on SM1 @ P2 and PIN 61 on YM2610
    32 A2   <=> PIN 13 on AS244 @ P1 and PIN 06 on RAM @ L1 and PIN 10 on SM1 @ P2 and PIN 02 on LS139 @ L2 and and PIN 14 on LS139 @ L2
    33 A3   <=> PIN 06 on AS244 @ P1 and PIN 05 on RAM @ L1 and PIN 09 on SM1 @ P2 and PIN 03 on LS139 @ L2 and and PIN 13 on LS139 @ L2
    34 A4   <=> PIN 15 on AS244 @ P1 and PIN 04 on RAM @ L1 and PIN 08 on SM1 @ P2 and PIN 12 on LS74  @ K1
    35 A5   <=> PIN 04 on AS244 @ P1 and PIN 03 on RAM @ L1 and PIN 07 on SM1 @ P2
    36 A6   <=> PIN 17 on AS244 @ P1 and PIN 02 on RAM @ L1 and PIN 06 on SM1 @ P2
    37 A7   <=> PIN 02 on AS244 @ P1 and PIN 01 on RAM @ L1 and PIN 05 on SM1 @ P2
    38 A8   <=> PIN 11 on AS244 @ R1 and PIN 23 on RAM @ L1 and PIN 27 on SM1 @ P2
    39 A9   <=> PIN 08 on AS244 @ R1 and PIN 22 on RAM @ L1 and PIN 26 on SM1 @ P2
    40 A10  <=> PIN 13 on AS244 @ R1 and PIN 19 on RAM @ L1 and PIN 23 on SM1 @ P2
    
    LS74 @ K1
    01 1CLR <=> PIN 14 on LS74 @ K1 and PIN 13 on LS74 @ K1 (VCC)
    02 1D   <=> PIN 09 on LS74 @ K1
    03 1CLK <=> PIN 53 on PRO-B0
    04 1PRE <=> PIN 08 on LS08 @ K2
    05 1Q   <=> PIN 17 on Z80
    06 1QH  <=> PIN ??
    07 GND  <=> GND
    08 2QH  <=> PIN ??
    09 2Q   <=> PIN 02 on LS74 @ K1
    10 2PRE <=> PIN 26 on Z80 and PIN 09 on LS08 @ K2 and PIN 33 on YM2610 and PIN 38 on PRO-C0
    11 2CLK <=> PIN 10 on LS139 @ L2
    12 2S   <=> PIN 34 on Z80 PIN 15 on AS244 @ P1 and PIN 04 on RAM @ L1 and PIN 08 on SM1 @ P2
    13 2CLR <=> PIN 14 on LS74 @ K1 and PIN 01 on LS74 @ K1 (VCC)
    14 VCC  <=> 5V
    
    LS08 @ K2
    01 A1  <=> PIN 03 on PRO-C0 and PIN 13 on AS244 @ C11
    02 B1  <=> PIN 11 on PRO-C0 and PIN 11 on AS244 @ C11
    03 Y1  <=> PIN 04 on AS244 @ F2
    04 A2  <=> PIN 05 on LS139 @ L2 and PIN 59 on YM2610
    05 B2  <=> PIN 11 on LS139 @ L2 and PIN 58 on YM2610
    06 Y2  <=> PIN 57 on YM2610
    07 GND <=> GND
    08 Y3  <=> PIN 04 on LS74 @ K1
    09 A3  <=> PIN 10 on LS74 @ K1 and PIN 26 on Z80 and PIN 33 on YM2610 and PIN 38 on PRO-C0
    10 B3  <=> PIN 04 on LS139 @ L2 and PIN 41 on PRO-B0
    11 Y4  <=> PIN 20 on SP1
    12 A4  <=> PIN 07 on PRO-C0
    13 B4  <=> PIN 15 on PRO-C0
    14 VCC <=> 5V
    
    LS139 @ L2
    01 ENA <=> PIN 11 on LS32  @ N3
    02 A0  <=> PIN 14 on LS139 @ L2 and PIN 06 on RAM @ L1 and PIN 13 on AS244 @ P1 and PIN 32 on Z80 and PIN 10 on SM1 @ P2
    03 A1  <=> PIN 13 on LS139 @ L2 and PIN 05 on RAM @ L1 and PIN 06 on AS244 @ P1 and PIN 33 on Z80 and PIN 09 on SM1 @ P2
    04 Y0  <=> PIN 10 on LS08  @ K2 and PIN 41 on PRO-B0
    05 Y1  <=> PIN 04 on LS08  @ K2 and PIN 59 on YM2610
    06 Y2  <=> PIN 08 on LS244 @ R3
    07 Y3  <=> PIN 06 on LS244 @ R3
    08 GND <=> GND
    09 X3  <=> PIN 50 on PRO-B0
    10 X2  <=> PIN 11 on LS74 @ K1
    11 X1  <=> PIN 05 on LS08 @ K2 and PIN 58 on YM2610
    12 X0  <=> PIN 51 on PRO-B0
    13 B1  <=> PIN 03 on LS139 @ L2 and PIN 06 on RAM @ L1 and PIN 13 on AS244 @ P1 and PIN 32 on Z80 and PIN 10 on SM1 @ P2
    14 B0  <=> PIN 02 on LS139 @ L2 and PIN 06 on RAM @ L1
    15 ENB <=> PIN 03 on LS32  @ N3
    16 VCC <=> 5V
    
    RAM @ L1
    01 A7  <=> PIN 37 on Z80 and PIN 02 on AS244 @ P1 and PIN 05 on SM1 @ P2
    02 A6  <=> PIN 36 on Z80 and PIN 17 on AS244 @ P1 and PIN 06 on SM1 @ P2
    03 A5  <=> PIN 35 on Z80 and PIN 04 on AS244 @ P1 and PIN 07 on SM1 @ P2
    04 A4  <=> PIN 24 on Z80 and PIN 15 on AS244 @ P1 and PIN 08 on SM1 @ P2 and PIN 12 on LS74  @ K1
    05 A3  <=> PIN 33 on Z80 and PIN 06 on AS244 @ P1 and PIN 09 on SM1 @ P2 and PIN 03 on LS139 @ L2 and and PIN 13 on LS139 @ L2
    06 A2  <=> PIN 32 on Z80 and PIN 13 on AS244 @ P1 and PIN 10 on SM1 @ P2 and PIN 02 on LS139 @ L2 and and PIN 14 on LS139 @ L2
    07 A1  <=> PIN 31 on Z80 and PIN 08 on AS244 @ P1 and PIN 11 on SM1 @ P2 and PIN 61 on YM2610
    08 A0  <=> PIN 30 on Z80 and PIN 11 on AS244 @ P1 and PIN 12 on SM1 @ P2 and PIN 60 on YM2610
    09 D0  <=> PIN 14 on Z80 and PIN 13 on SM1   @ P2 and PIN 02 on YM2610   and PIN 42 on PRO-B0
    10 D1  <=> PIN 15 on Z80 and PIN 14 on SM1   @ P2 and PIN 03 on YM2610   and PIN 43 on PRO-B0
    11 D2  <=> PIN 12 on Z80 and PIN 15 on SM1   @ P2 and PIN 04 on YM2610   and PIN 44 on PRO-B0
    12 GND <=> GND
    13 D3  <=> PIN 08 on Z80 and PIN 17 on SM1   @ P2 and PIN 05 on YM2610   and PIN 45 on PRO-B0
    14 D4  <=> PIN 07 on Z80 and PIN 18 on SM1   @ P2 and PIN 06 on YM2610   and PIN 46 on PRO-B0
    15 D5  <=> PIN 09 on Z80 and PIN 19 on SM1   @ P2 and PIN 07 on YM2610   and PIN 47 on PRO-B0
    16 D6  <=> PIN 10 on Z80 and PIN 20 on SM1   @ P2 and PIN 08 on YM2610   and PIN 48 on PRO-B0
    17 D7  <=> PIN 13 on Z80 and PIN 21 on SM1   @ P2 and PIN 09 on YM2610   and PIN 49 on PRO-B0
    18 CS  <=> PIN 12 on AS04  @ D7
    19 A10 <=> PIN 40 on Z80 and PIN 13 on AS244 @ R1 and PIN 19 on RAM @ L1 and PIN 23 on SM1 @ P2
    20 OE  <=> PIN 06 on LS32  @ N3 and PIN 02 on SM1 and PIN 02 on LS244 @ R3
    21 WE  <=> PIN 08 on LS32  @ N3
    22 A9  <=> PIN 39 on Z80 and PIN 08 on AS244 @ R1 and PIN 26 on SM1 @ P2
    23 A8  <=> PIN 38 on Z80 and PIN 11 on AS244 @ R1 and PIN 27 on SM1 @ P2
    24 VCC <=> 5V
    
    AS32 @ R6
    015 A  <=> PIN 19 on L245  @ H5 and PIN 28 on PRO-C0
    02 6B  <=> PIN 77 on PR0-C0     and PIN 01 on LS245 @ H5 and PIN 01 on LS245 @ E5
    03 Y7  <=> PIN 27 on both PAL RAMS
    04 A2  <=> PIN 20 on SFIX
    05 B2  <=> PIN 13 on AS32  @ R6 and PIN 04 on AS244 @ R3 and PIN 06 on LS11 @ M3
    06 Y2  <=> PIN 22 on SM1
    07 GND <=> GND
    08 Y3  <=> PIN 19 on AS245 @ R2
    09 A3  <=> PIN 19 on Z80        and PIN 05 on LS32  @ N3 and PIN 10 on LS32 @ N3
    10 B3  <=> PIN 11 on AS32  @ R6
    11 Y4  <=> PIN 10 on AS32  @ R6
    12 A4  <=> PIN 02 on LS04  @ C8 and PIN 08 on AS244 @ B11 and PIN 13 on AS244 @ B11
    13 B4  <=> PIN 05 on AS32  @ R6 and PIN 04 on AS244 @ R3  and PIN 06 on LS11 @ M3
    14 VCC <=> 5V
    
    PRO-B0
    41 SDZ80R   <=> PIN 04 on LS139 @ L2 and PIN 10 on LS08  @K2
    50 SDZ80W   <=> PIN 09 on LS139 @ L2
    51 SDZ80CLR <=> PIN 12 on LS139 @ L2
    52 SDW      <=> PIN 03 on LS74  @ K1
    Last edited by ack; 07-21-2019 at 12:20 PM.

  12. #12
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    Quote Originally Posted by ack View Post
    These are my notes for z80 on MV4.
    This is amazing, thanks. I really am stuck at the moment so will take a good look at this.

  13. #13
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    Quote Originally Posted by leejsmith View Post
    This is amazing, thanks. I really am stuck at the moment so will take a good look at this.
    No problem, hope it helps. This is what I have for the slot board.

    Code:
    MV4 / Slot 4:
    PROG (CTRG8)
     01A <=> GND
     02A <=> GND
     03A <=> GND
     04A <=> GND
     05A <=> PIN 09 on LS245 @ R4
     06A <=> PIN 08 on LS245 @ R4
     07A <=> PIN 07 on LS245 @ R4
     08A <=> PIN 06 on LS245 @ R4
     09A <=> PIN 05 on LS245 @ R4
     10A <=> PIN 04 on LS245 @ R4
     11A <=> PIN 03 on LS245 @ R4
     12A <=> PIN 02 on LS245 @ R4
     13A <=> PIN 09 on LS245 @ R3
     14A <=> PIN 08 on LS245 @ R3
     15A <=> PIN 07 on LS245 @ R3
     16A <=> PIN 06 on LS245 @ R3
     17A <=> PIN 05 on LS245 @ R3
     18A <=> PIN 04 on LS245 @ R3
     19A <=> PIN 03 on LS245 @ R3
     20A <=> PIN 02 on LS245 @ R3
     21A <=> PIN 01 on LS245 @ R4 and PIN 01 on LS245 @ R3 and PIN 01 on LS245 @ R4 and PIN 09 on F244 @ R2
     22A <=> PIN 07 on  F244 @ R2
     23A <=> PIN 05 on  F244 @ R2
     24A <=> PIN 03 on  F244 @ R2
     25A <=> PIN 12 on  F244 @ R2
     26A <=> PIN 14 on  F244 @ R2
     27A <=> PIN 16 on  F244 @ R2
     28A <=> PIN 18 on  F244 @ R2
     29A <=> VCC
     30A <=> VCC
     31A <=> VCC
     32A <=> VCC
     33A <=> PIN 18 on LS244 @ R6
     34A <=> NC
     35A <=> NC
     36A <=> NC
     37A <=> NC
     38A <=> NC
     39A <=> NC
     40A <=> NC
     41A <=> NC
     42A <=> PIN 19 on LS245 @ S3/S4/S5/S6/P5 (also connects to 42A on CHA slot4)
     43A <=> PIN 16 on LS244 @ R6
     44A <=> PIN 14 on LS244 @ R6
     45A <=> PIN 12 on LS244 @ R6
     46A <=> PIN 07 on LS244 @ R6
     47A <=> PIN 05 on LS244 @ R6
     48A <=> PIN 03 on LS244 @ R6
     49A <=> PIN 18 on LS244 @ R5
     50A <=> PIN 16 on LS244 @ R5
     51A <=> PIN 14 on LS244 @ R5
     52A <=> PIN 12 on LS244 @ R5
     53A <=> PIN 09 on LS244 @ R5
     54A <=> PIN 07 on LS244 @ R5
     55A <=> PIN 05 on LS244 @ R5
     56A <=> PIN 03 on LS244 @ R5
     57A <=> GND
     58A <=> GND
     59A <=> GND
     60A <=> GND
    
     01B <=> GND
     02B <=> GND
     03B <=> GND
     04B <=> GND
     05B <=> PIN 09 on LS244 @ S4
     06B <=> PIN 07 on LS244 @ S4
     07B <=> PIN 05 on LS244 @ S4
     08B <=> PIN 03 on LS244 @ S4
     09B <=> PIN 18 on LS244 @ S4
     10B <=> PIN 16 on LS244 @ S4
     11B <=> PIN 14 on LS244 @ S4
     12B <=> PIN 12 on LS244 @ S4
     13B <=> PIN 09 on LS244 @ S3
     14B <=> PIN 07 on LS244 @ S3
     15B <=> PIN 05 on LS244 @ S3
     16B <=> PIN 03 on LS244 @ S3
     17B <=> PIN 18 on LS244 @ S3
     18B <=> PIN 16 on LS244 @ S3
     19B <=> PIN 14 on LS244 @ S3
     20B <=> PIN 12 on LS244 @ S3
     21B <=> PIN 18 on  F244 @ S2
     22B <=> PIN 16 on  F244 @ S2
     23B <=> PIN 14 on  F244 @ S2
     24B <=> PIN 12 on  F244 @ S2
     25B <=> PIN 03 on  F153 @ R7
     26B <=> PIN 13 on  F153 @ R7
     27B <=> PIN 03 on  F153 @ S7
     28B <=> PIN 13 on  F153 @ S7
     29B <=> VCC
     30B <=> VCC
     31B <=> VCC
     32B <=> VCC
     33B <=> PIN 09 on  F244 @ S2
     34B <=> PIN 07 on  F244 @ S2
     35B <=> PIN 18B on CHA SLOT4
     36B <=> NC
     37B <=> NC
     38B <=> NC
     39B <=> NC
     40B <=> NC
     41B <=> PIN 18 on LS245 @ S6
     42B <=> PIN 17 on LS245 @ S6
     43B <=> PIN 16 on LS245 @ S6
     44B <=> PIN 15 on LS245 @ S6
     45B <=> PIN 14 on LS245 @ S6
     46B <=> PIN 13 on LS245 @ S6
     47B <=> PIN 12 on LS245 @ S6
     48B <=> PIN 11 on LS245 @ S6
     49B <=> PIN 18 on LS245 @ S5
     50B <=> PIN 17 on LS245 @ S5
     51B <=> PIN 16 on LS245 @ S5
     52B <=> PIN 15 on LS245 @ S5
     53B <=> PIN 14 on LS245 @ S5
     54B <=> PIN 13 on LS245 @ S5
     55B <=> PIN 12 on LS245 @ S5
     56B <=> PIN 11 on LS245 @ S5
     57B <=> GND
     58B <=> GND
     59B <=> GND
     60B <=> GND
    
    CHA (CTRG7)
     01A <=> GND
     02A <=> GND
     03A <=> PIN 12 on LS244 @ N4
     04A <=> PIN 14 on LS244 @ N4
     05A <=> PIN 16 on LS244 @ N4
     06A <=> PIN 18 on LS244 @ N4
     07A <=> PIN 09 on LS244 @ N4
     08A <=> PIN 07 on LS244 @ N4
     09A <=> PIN 05 on LS244 @ N4
     10A <=> PIN 03 on LS244 @ N4
     11A <=> PIN 12 on LS244 @ N3
     12A <=> PIN 14 on LS244 @ N3
     13A <=> PIN 16 on LS244 @ N3
     14A <=> PIN 18 on LS244 @ N3
     15A <=> PIN 09 on LS244 @ N3
     16A <=> PIN 07 on LS244 @ N3
     17A <=> PIN 05 on LS244 @ N3
     18A <=> PIN 03 on LS244 @ N3
     19A <=> PIN 03 on  F253 @ B1
     20A <=> PIN 03 on  F253 @ C1
     21A <=> PIN 03 on  F253 @ D1
     22A <=> PIN 03 on  F253 @ E1
     23A <=> PIN 03 on  F253 @ F1
     24A <=> PIN 03 on  F253 @ G1
     25A <=> PIN 03 on  F253 @ N1
     26A <=> PIN 03 on  F253 @ P1
     27A <=> PIN 03 on  F253 @ R1
     28A <=> PIN 03 on  F253 @ S1
     29A <=> VCC
     30A <=> VCC
     31A <=> VCC
     32A <=> VCC
     33A <=> PIN 03 on  F253 @ A7
     34A <=> PIN 03 on  F253 @ B7
     35A <=> PIN 03 on  F253 @ C7
     36A <=> PIN 03 on  F253 @ H7
     37A <=> PIN 03 on  F253 @ J7
     38A <=> PIN 03 on  F253 @ K7
     39A <=> NC
     40A <=> NC
     41A <=> NC
     42A <=> PIN 19 on LS245 @ R3/R4/S5/S6/P5 (also connects to 42A on PROG slot4)
     43A <=> PIN 12 on LS244 @ N6
     44A <=> PIN 14 on LS244 @ N6
     45A <=> PIN 16 on LS244 @ N6
     46A <=> PIN 18 on LS244 @ N6
     47A <=> PIN 09 on LS244 @ N6
     48A <=> PIN 07 on LS244 @ N6
     49A <=> PIN 05 on LS244 @ N6
     50A <=> PIN 03 on LS244 @ N6
     51A <=> PIN 12 on LS244 @ N5
     52A <=> PIN 14 on LS244 @ N5
     53A <=> PIN 16 on LS244 @ N5
     54A <=> PIN 18 on LS244 @ N5
     55A <=> PIN 09 on LS244 @ N5
     56A <=> PIN 07 on LS244 @ N5
     57A <=> PIN 05 on LS244 @ N5
     58A <=> PIN 03 on LS244 @ N5
     59A <=> GND
     60A <=> GND
    
     01B <=> GND
     02B <=> GND
     03B <=> PIN 12 on LS244 @ P4
     04B <=> PIN 14 on LS244 @ P4
     05B <=> PIN 16 on LS244 @ P4
     06B <=> PIN 18 on LS244 @ P4
     07B <=> PIN 03 on LS244 @ P4
     08B <=> PIN 05 on LS244 @ P4
     09B <=> PIN 07 on LS244 @ P4
     10B <=> PIN 09 on LS244 @ P4
     11B <=> PIN 12 on LS244 @ P2
     12B <=> PIN 14 on LS244 @ P2
     13B <=> PIN 16 on LS244 @ P2
     14B <=> PIN 18 on LS244 @ P2
     15B <=> PIN 03 on LS244 @ P2
     16B <=> PIN 05 on LS244 @ P2
     17B <=> PIN 07 on LS244 @ P2
     18B <=> PIN 09 on LS244 @ P2
     19B <=> PIN 13 on  F253 @ B1
     20B <=> PIN 13 on  F253 @ C1
     21B <=> PIN 13 on  F253 @ D1
     22B <=> PIN 13 on  F253 @ E1
     23B <=> PIN 13 on  F253 @ F1
     24B <=> PIN 13 on  F253 @ G1
     25B <=> PIN 13 on  F253 @ N1
     26B <=> PIN 13 on  F253 @ P1
     27B <=> PIN 13 on  F253 @ R1
     28B <=> PIN 13 on  F253 @ S1
     29B <=> VCC
     30B <=> VCC
     31B <=> VCC
     32B <=> VCC
     33B <=> PIN 13 on  F253 @ A7
     34B <=> PIN 13 on  F253 @ B7
     35B <=> PIN 13 on  F253 @ C7
     36B <=> PIN 13 on  F253 @ H7
     37B <=> PIN 13 on  F253 @ J7
     38B <=> PIN 13 on  F253 @ K7
     39B <=> PIN 03 on  F253 @ L7
     40B <=> PIN 13 on  F253 @ L7
     41B <=> PIN 03 on  F253 @ M7
     42B <=> PIN 13 on  F253 @ M7
     43B <=> PIN 03 on  F253 @ N7
     44B <=> PIN 13 on  F253 @ N7
     45B <=> PIN 03 on  F253 @ P7
     46B <=> PIN 13 on  F253 @ P7
     47B <=> PIN 12 on  F244 @ P6
     48B <=> PIN 14 on  F244 @ P6
     49B <=> PIN 16 on  F244 @ P6
     50B <=> PIN 18 on  F244 @ P6
     51B <=> PIN 11 on LS245 @ P5
     52B <=> PIN 12 on LS245 @ P5
     53B <=> PIN 13 on LS245 @ P5
     54B <=> PIN 14 on LS245 @ P5
     55B <=> PIN 15 on LS245 @ P5
     56B <=> PIN 16 on LS245 @ P5
     57B <=> PIN 17 on LS245 @ P5
     58B <=> PIN 18 on LS245 @ P5
     59B <=> GND
     60B <=> GND
    
    F153 @ R7
     01 <=> GND
     02 <=> PIN 02 on F153 @ S7 / PIN 05 on F174 @ A1
     03 <=> PIN 25B on CTRG8 @ slot4
     04 <=> PIN 25B on CTRG6 @ slot3
     05 <=> PIN 25B on CTRG4 @ slot2
     06 <=> PIN 25B on CTRG2 @ slot1
     07 <=> PIN 25B on CN10
     08 <=> GND
     09 <=> PIN 28B on CN10
     10 <=> PIN 26B on CTRG2 @ slot1
     11 <=> PIN 26B on CTRG4 @ slot2
     12 <=> PIN 26B on CTRG6 @ slot3
     13 <=> PIN 26B on CTRG8 @ slot4
     14 <=> PIN 14 on F153 @ S7 / PIN 02 on F174 @ A1
     15 <=> GND
     16 <=> VCC
    
    F153 @ S7
     01 <=> GND
     02 <=> PIN  02 on F153 @ R7 / PIN 05 on F174 @ A1
     03 <=> PIN 27B on CTRG8 @ slot4
     04 <=> PIN 27B on CTRG6 @ slot3
     05 <=> PIN 27B on CTRG4 @ slot2
     06 <=> PIN 27B on CTRG2 @ slot1
     07 <=> PIN 26B on CN10
     08 <=> GND
     09 <=> PIN 27B on CN10
     10 <=> PIN 28B on CTRG2 @ slot1
     11 <=> PIN 28B on CTRG4 @ slot2
     12 <=> PIN 28B on CTRG6 @ slot3
     13 <=> PIN 28B on CTRG8 @ slot4
     14 <=> PIN  14 on F153 @ R7 / PIN 02 on F174 @ A1
     15 <=> GND
     16 <=> VCC
    
    F174 @ A1
     01 <=> PIN 11 on LS244 @ B2/F2/K2/P2 and PIN 19B on CN9
     02 <=> PIN 14 on  F153 @ R7/S7 and PIN 14 on  F253 @ B1/C1/D1/E1/F1/G1/N1/P1
     03 <=> PIN 14 on self and PIN 11 on LS245 @ C4/G4/L4/R4 and PIN 05A on CN10
     04 <=> PIN 13 on self and PIN 12 on LS245 @ C4/G4/L4/R4 and PIN 06A on CN10
     05 <=> PIN 02 on  F153 @ R7/S7 and PIN 02 on  F253 @ B1/C1/D1/E1/F1/G1/N1/P1
     06 <=> PIN 11 on self and PIN 13 on LS245 @ C4/G4/L4/R4 and PIN 07A on CN10
     07 <=> PIN 03 on F138 @ A2
     08 <=> GND
     09 <=> PIN 22A on CN11
     10 <=> NC?
     11 <=> PIN 06 on self and PIN 13 on LS245 @ C4/G4/L4/R4 and PIN 07A on CN10
     12 <=> NC?
     13 <=> PIN 04 on self and PIN 12 on LS245 @ C4/G4/L4/R4 and PIN 06A on CN10
     14 <=> PIN 03 on self and PIN 11 on LS245 @ C4/G4/L4/R4 and PIN 05A on CN10
     15 <=> PIN 14 on F253 @ R1/S1/A7/B7/C7/H7/J7/K7/L7/M7/N7/P7
     16 <=> VCC
    
    LS244 @ E5
     01 <=> PIN 01 on LS244 @ E5 / GND
     02 <=> PIN 02 on LS244 @ A5/J5/N5 and PIN 25A on CN8
     03 <=> PIN 50A on CRTG5 @ slot 4
     04 <=> PIN 04 on LS244 @ A5/J5/N5 and PIN 24A on CN8
     05 <=> PIN 49A on CRTG5 @ slot 4
     06 <=> PIN 06 on LS244 @ A5/J5/N5 and PIN 23A on CN8
     07 <=> PIN 48A on CRTG5 @ slot 4
     08 <=> PIN 08 on LS244 @ A5/J5/N5 and PIN 22A on CN8
     09 <=> PIN 47A on CRTG5 @ slot 4
     10 <=> GND
     11 <=> PIN 11 on LS244 @ A5/J5/N5 and PIN 26A on CN8
     12 <=> PIN 43A on CRTG5 @ slot 4
     13 <=> PIN 13 on LS244 @ A5/J5/N5 and PIN 27A on CN8
     14 <=> PIN 44A on CRTG5 @ slot 4
     15 <=> PIN 15 on LS244 @ A5/J5/N5 and PIN 28A on CN8
     16 <=> PIN 45A on CRTG5 @ slot 4
     17 <=> PIN 17 on LS244 @ A5/J5/N5 and PIN 29A on CN8
     18 <=> PIN 46A on CRTG5 @ slot 4
     19 <=> GND
     20 <=> VCC
    The other slots follow the same pattern, just have to adjust the IC location.

  14. #14

  15. #15
    Crazed MVS Addict

    Join Date
    Aug 2017
    Location
    UK

    Posts
    149
    Quote Originally Posted by Xian Xi View Post
    What’s your voltage at on the top board measured at the chip furthest from the edge connector?
    Voltage is fine across the board, I have probed so many chips on my scope I can say with confidance.

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