Exidy 440 Board Conversion

[texasmame]

Well, used another audio board that had a LS367 instead of a 368. Did the other jumpering and cutting of trace at A2 as required, as they hadn't been done yet (original Crossbow audio PCB) and got it to ERROR R. Replaced the 367 with a 368 and now back to ERROR 0.

 

[Jamesv833]

I seem to recall seeing some boxes(dotted lines) in the schematic for some jumpers. I believe one said 50hz and another said something about mem(memory?). Maybe these jumpers have something to do with it? I had a look at my boardset that's the same as yours(originally a crackshot) because I'm having the same issue(error 0), I originally thought there was a rom I missed programming but it's just a 6116(g1). I believe that there is a bipolar prom that's been confirmed to be the same for a few games, I wonder if it's different(probably not since they seem to all be modifications of the same board) for chiller?

 

[texasmame]

I don't know anything about Crackshot, but the MAME driver says this for Crackshot and Chiller (both relative to a Crossbow base):

 Differences between machines (assuming Crossbow is the base)

    Crackshot (reports Hardware Error W if any of these are not true)
        * a read from $2E20 must return 0 in bit 2
        * a read from $2E80 must return 0's in bits 1,2,3,4,5
        * a read from $2B03 must return 0 in bit 0
        conclusion: LS244 at 18J on main board needs to generate negative logic
                        LS367 at 1A on audio board needs to generate negative logic
                        LS128 at 2A on audio board needs negative logic into pin 5

    Chiller (reports Hardware Error R if any of these are not true)
        * a read from $2E20 must return 0 in bit 2
        * a read from $2E80 must return 0's in bits 1,2,3,4,5
        * a read from $2B03 must return 0 in bit 0
        conclusion: LS244 at 18J on main board needs to generate negative logic
                        LS367 at 1A on audio board needs to generate negative logic
                        LS128 at 2A on audio board needs negative logic into pin 5

...which likely doesn't help, as is seems to state that the configuration of Crackshot and Chiller should be the same. Maybe there's a unique jumper or cut trace for Crackshot. Sorry I'm just guessing...I'm not anywhere where I can access the schematics or a board at the moment. Do you know if the HARDWARE DOWN: ERROR 0 that you are seeing means something else specific compared to the Hardware Error W & R that are in the MAME notes?

Tried just booting the main board (as you suggested on CMNDR BRAIN'S page) and get the HARDWARE ERROR R. Is that what is meant by you can boot the main board by itself? It does boot and says CHILLER 3.0, etc. but just stops there. Can't enter any self-tests.

EDIT: Also tried on a known good Crackshot main PCB and get the HARDWARE ERROR W and it stops there.

Then tried with a known good Chyenne and I get to the initial self-test screen and it's all good until the AUDIO error message. No start button input available as it's on the audio board. so, guessing that's as far as we get with no audio PCB.

Lastly, nowhere in the driver does it mention HARDWARE ERROR 0.

https://github.com/Neo2003/mame4all-pi-adv/blob/master/src/drivers/exidy440.cpp

Hmm. . .

 

[aramis]

Tried just booting the main board (as you suggested on CMNDR BRAIN'S page) and get the HARDWARE ERROR R. Is that what is meant by you can boot the main board by itself? It does boot and says CHILLER 3.0, etc. but just stops there. Can't enter any self-tests.

EDIT: Also tried on a known good Crackshot main PCB and get the HARDWARE ERROR W and it stops there.

Then tried with a known good Chyenne and I get to the initial self-test screen and it's all good until the AUDIO error message. No start button input available as it's on the audio board. so, guessing that's as far as we get with no audio PCB.

Lastly, nowhere in the driver does it mention HARDWARE ERROR 0.

https://github.com/Neo2003/mame4all-pi-adv/blob/master/src/drivers/exidy440.cpp

Hmm. . .

If I remember correctly (unfortunately, the boards I had have been returned to the client), without the audio board you can get as far as the "AUDIO HARDWARE POWER DOWN" error (or whatever the text was...I'm going from memory).

I never saw a HARDWARE ERROR R, W, or 0 when using just the main PCB w/o the audio PCB. Both of the boards I was working on were originally Cheyenne boards, though. Not sure if that matters.

 

[texasmame]

If I remember correctly (unfortunately, the boards I had have been returned to the client), without the audio board you can get as far as the "AUDIO HARDWARE POWER DOWN" error (or whatever the text was...I'm going from memory).

I never saw a HARDWARE ERROR R, W, or 0 when using just the main PCB w/o the audio PCB. Both of the boards I was working on were originally Cheyenne boards, though. Not sure if that matters.

I had an error W on a main board only working Crackshot other night. Put the audio board back on and it worked fine. Guess not all boards can be booted without the audio board.

DAMN YOU, EXIDY!

 

[texasmame]

Exidy hardware down error 0 fix for when converting boards:

https://forums.arcade-museum.com/showthread.php?p=4001204#post4001204

 

[aramis]

I had an error W on a main board only working Crackshot other night. Put the audio board back on and it worked fine. Guess not all boards can be booted without the audio board.

DAMN YOU, EXIDY!

Good to know, thank you!

 

[aramis]

Exidy hardware down error 0 fix for when converting boards:

https://forums.arcade-museum.com/showthread.php?p=4001204#post4001204

YES! Glad that flushing that EEPROM was all it took!

 

[texasmame]

When converting to a Chiller, the EPROM on the sound PCB at H1 is only a 4k image. Best bet is to double the image, using this DOS prompt, with the obvious renaming:

copy \b single_rom.bin + single_rom.bin double_rom.bin

This will allow you to burn it to the same as all the other EPROMs (2764) as burning it as a 4K image will not work.

Been told you can also burn it as a 4K image to a 2732 but haven't tried that.