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thorobred
USA
5 Posts |
 Posted - 10/08/2017 : 14:49:12
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I just started using the GQ 4x4 for pinball eproms.
I purchased a few AM2716B 12.5v eproms. I used the programmer to make a sound chip for a pinball just to see if everything worked.
All was well, and sound eprom AM2716B 12.5v worked perfect.
Now I am trying to make more roms with the 2716B and keep getting write errors. I even tried to make another sound rom and still now get write error.
Seems something is wrong as I previously made a good sound rom with the same 2716B, but now get write errors every time.
I tried external 6v power, slower speed, still same error.
Can anyone help me with some advice or suggestions?
Thanks Much
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| Reply #1
anniel
2572 Posts |
Posted - 10/08/2017 : 16:27:40
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quote:
Originally posted by thorobred
I just started using the GQ 4x4 for pinball eproms.
I purchased a few AM2716B 12.5v eproms. I used the programmer to make a sound chip for a pinball just to see if everything worked.
All was well, and sound eprom AM2716B 12.5v worked perfect.
Now I am trying to make more roms with the 2716B and keep getting write errors. I even tried to make another sound rom and still now get write error.
Seems something is wrong as I previously made a good sound rom with the same 2716B, but now get write errors every time.
I tried external 6v power, slower speed, still same error.
Can anyone help me with some advice or suggestions?
Thanks Much
Did you erase it correctly? |
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| Reply #2
thorobred
USA
5 Posts |
Posted - 10/09/2017 : 04:35:41
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Thank You for your reply.
I used the EPROM eraser I got with the GQ 4x4. I ran blank check before every try, and GQ software said chip is blank. Is there a special way to erase correctly? I am very new to this and really don't know anything about burning eproms.
I did notice one of the 2716 eprom always comes up as not blank no matter how many times I erase it.
The errors I get are so fast into the write process that the chip is still blank when using blank check. The error I get with the sound file I burned sucessfully once is this
"Write Failed, Address = 0x000000, buffer = 0x87 device = 0xFF
The error for the other file is:
"Write Failed, address = 0x000000, buffer = 0x1A Device = 0xFF
What is the time period for correctly erasing an eprom?
I'm not sure but I think the good eproms I made were used as I received them.
Seems any eprom I erased wont work, not sure on this as I just thought of it.
The eraser is one that came with the GQ 4x4 as a package. It looks very cheap but it came from GQ 4x4 manufacture.
Confused |
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| Reply #3
anniel
2572 Posts |
Posted - 10/09/2017 : 06:24:09
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quote:
Originally posted by thorobred
Thank You for your reply.
I used the EPROM eraser I got with the GQ 4x4. I ran blank check before every try, and GQ software said chip is blank. Is there a special way to erase correctly? I am very new to this and really don't know anything about burning eproms.
I did notice one of the 2716 eprom always comes up as not blank no matter how many times I erase it.
The errors I get are so fast into the write process that the chip is still blank when using blank check. The error I get with the sound file I burned sucessfully once is this
"Write Failed, Address = 0x000000, buffer = 0x87 device = 0xFF
The error for the other file is:
"Write Failed, address = 0x000000, buffer = 0x1A Device = 0xFF
What is the time period for correctly erasing an eprom?
I'm not sure but I think the good eproms I made were used as I received them.
Seems any eprom I erased wont work, not sure on this as I just thought of it.
The eraser is one that came with the GQ 4x4 as a package. It looks very cheap but it came from GQ 4x4 manufacture.
Confused
If one chip does not erase well it's probably bad.
Do you use external power to program? |
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| Reply #4
thorobred
USA
5 Posts |
Posted - 10/09/2017 : 07:21:31
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Yes I am using a 6v external power supply.
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| Reply #5
anniel
2572 Posts |
Posted - 10/09/2017 : 11:45:06
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quote:
Originally posted by thorobred
Yes I am using a 6v external power supply.
You need 9V. |
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| Reply #6
thorobred
USA
5 Posts |
Posted - 10/10/2017 : 11:25:24
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OK, I'll try 9v
But I think the eproms are bad.
Got them off ebay, seller is sending 4 more from a different batch.
Thanks for all your help. |
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| Reply #7
thorobred
USA
5 Posts |
Posted - 10/10/2017 : 11:26:02
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OK, I'll try 9v
But I think the eproms are bad.
Got them off ebay, seller is sending 4 more from a different batch.
Thanks for all your help. |
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| Reply #8
anniel
2572 Posts |
Posted - 10/10/2017 : 16:16:56
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quote:
Originally posted by thorobred
OK, I'll try 9v
But I think the eproms are bad.
Got them off ebay, seller is sending 4 more from a different batch.
Thanks for all your help.
Let me guess... from China. |
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Topic |
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New GQ 4x4 user....need help..Please
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