Having some trouble burning some chips for another member

Broodwich

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Having some trouble burning some chips for another member

Trying to help my buddy Tighe fix his Galaxian buy reburning his Daughter/rom board set (7U,V,W,Y,Z), he got the chips from bob roberts they're nmc27c16q-45's. I set my Top853 USB programmer to do MC2716 12.7v figuring that wouldn't nuke the chip hopefully if not correct.

I spent a good amount of time searching for a datasheet on this chip for the delay time and voltage but didn't have much luck, I didn't want to pull the trigger on burning until I was satisfied that there was no other option at the time.

No luck burning tho, i tried 2 chips and got a Error: 00000 (FF) so now they're in the oven getting wiped. the files are 2.0kb according to windows and are suppose to be correct for the chips.

Any idea(s) what i'm doing wrong or maybe my cheap ebay programmer just can't do this task? I'd rather not perma nuke any of his chips but we both understand there can be casualties.

I had some issues with some other chips but after an erase and a tweak to the delay time everything went smooth, I did verify the chips were blank before i started writing.

Thanks!
 
I knew I saved this link for a good reason and now I have a chance to use it....

http://forums.arcade-museum.com/showthread.php?t=192978

It is most likely the programmer and possibly you need the external voltage wall wart.

thing is the chip is on the list of compatible chips >.< but i do remember that thread from a while back. It's a shame this is a decent programmer, if only it had the option for external power. I'm not giving up on it yet and hopefully someone else has some better explanation but i'm fairly sure your right. I've had no problems burning any of the newer chips (which is mainly what i have and what i need).

I'm tempted to try burning again since they are freshly baked at 15minutes but would hate for tighe to be out a chip or two if he doesn't need to be.
 
Where do you have it plugged in? Which USB port? On my ASUS boards I have noticed that only some of the USB buses are high power. I believe the ones on the back plane by the network jack. My Android phone will only quick charge if plugged into the right port. Also some of my more demanding devices need to be plugged in there or on my linksys 8 port high power hub.
 
Where do you have it plugged in? Which USB port? On my ASUS boards I have noticed that only some of the USB buses are high power. I believe the ones on the back plane by the network jack. My Android phone will only quick charge if plugged into the right port. Also some of my more demanding devices need to be plugged in there or on my linksys 8 port high power hub.

I'm using the rear ports on this DFI Lanparty Pro 875B, I'm probably going to just try one of these freshly cleared chips again later but i was hoping someone might be able to throw in some info on if this is a 12.7v chip or if it's a higher voltage (and if they had the delay time or datasheet link that would be fantastic).

I've had 0 issues programming the 128 12.5v's you had. (once i figured out the delay).
 
I'm using the rear ports on this DFI Lanparty Pro 875B, I'm probably going to just try one of these freshly cleared chips again later but i was hoping someone might be able to throw in some info on if this is a 12.7v chip or if it's a higher voltage (and if they had the delay time or datasheet link that would be fantastic).

I've had 0 issues programming the 128 12.5v's you had. (once i figured out the delay).

That is awesome, now I just need to digest the instructions on how to do the mod. I photo would have been nice.

http://www.arcades.plus.com/galsingle.htm

Galaxian Single 27128 EPROM Modification

This document describes how to take a Midway Galaxian PCB (printed circuitry board) and modify it to use a single 27128 EPROM instead of five 2716 EPROMs that live on the satellite PCB. This should increase the reliability of the PCB as there are fewer chips, and the satellite board can be discarded.

Necessary equipment:
wire wrap wire
(1) 28 pin socket.
(1) 27128 EPROM
EPROM image. GALAX_7F.128 is the position 7F 27128 EPROM file for the original version of Galaxian. SGALX_7F.128 is the position 7F 27128 EPROM file for the Super Galaxian version. You can use either of these files.

PCB Modification steps.

Remove the original Galaxian satellite board from sockets 7F and 7L. This board holds the five 24 pin 2716 EPROMs (or ROMs) in positions 7U, 7V, 7W, 7Y, 7Z.


Bend out the following leads on a 28-pin DIP socket: 1, 2, 20, 22, 23, 26, 27, 28.


Install the socket into the Galaxian main logic board at location 7F (the right most socket, as facing the PCB with the edge connector towards the ceiling, that held the satellite board), aligning the inserted socket pin 14 with PCB socket pin 12. Pins 1, 2, 27, 28 will hang over and not plug into the PCB socket.


Connect pins 1, 27 and 28 together with wire-wrap wire, leaving about 1" connected to the socket. Connect the attached wire hanging from pins 1, 27, 28 to +5 volts on the logic PCB. This is best connected at location 7J pin 24 (where there is no socket or chip).


Connect the remaining pins on the new socket with wire-wrap wire as follows:
1) Tie Pin 2 (A12) to chip 7D Pin 5.
2) Tie Pin 20 (CE) to Ground (best connected at location 7J pin 12).
3) Tie Pin 22 (OE) to chip 8E pin 13.
4) Tie Pin 23 (A11) to chip 7D Pin 3.
5) Tie Pin 26 (A13) to chip 7D Pin 7.


Use hot-melt glue to secure the wire-wrap wire to the PC board.


Insert the pre-programmed 27128 EPROM into the new 28-pin socket.


Am I supposed to remove the original socket on the board and install the new larger one?? Or am I to just shove the larger chip socket into the original??

I am thinking I am supposed to put the larger socket into the smaller one.
 
That is awesome, now I just need to digest the instructions on how to do the mod. I photo would have been nice.

http://www.arcades.plus.com/galsingle.htm




Am I supposed to remove the original socket on the board and install the new larger one?? Or am I to just shove the larger chip socket into the original??

I am thinking I am supposed to put the larger socket into the smaller one.

You put the larger socket right into the smaller socket and you have pins hanging over on each end and if I remember right it is the 7f socket.
 
That is a cmos version of the 2716. They program at 12.5v instead of the 25v of a standard 2716. Sorry, those chips are likely toast if they got programmed at 25v.
Did you manually set the voltage to 12.7v? If you used the setting for MC2716 it was probably 25v.
You should not need any external power to program a cmos chip.
 
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That is a cmos version of the 2716. They program at 12.5v instead of the 25v of a standard 2716. Sorry, those chips are likely toast if they got programmed at 25v.
Did you manually set the voltage to 12.7v? If you used the setting for MC2716 it was probably 25v.
You should not need any external power to program a cmos chip.

good they're not fried then, i manually set them to 12.7v :D

I'll try them again today or tomorrow :D
 
If your EPROM burner has an option for an external power supply, use it. The older chips (even the CMOS versions) take more current than a USB powered burner can support. Before I abandoned the Willem's and bought an old school EPROM burner, the only way I could get through any xx16 chips was using a 1.2A 12V power supply for an HP laptop. When using USB for power, about 2/3 of the way through the burn the voltage would trail off and the burn would abort. About half the time the chip was toast as well.

I bought a BP Microsystems EP-1140 off Ebay and it works great. Only issue with it is that it needs a real printer port and it won't run on Windows 7. Windows XP, it works great.

ken
 
I have had terrible luck with 2716 with a GQ-4X and I had an external power supply Hooked up as well,Have just purchased a Data I/O 29B So Hopefully My 2716 woes Are over,I have also Heard the Wellon 380 struggle with them Too.
 
I have a pocket programmer II (parallel port) and I can do 2716's no problem, and 2532's no problem, but I always have problems with 2732's. They'll burn, and then confirm as correct, but you put them in a machine and they're not right. I don't know how it does that, but it does, consistantly.
 
I have had terrible luck with 2716 with a GQ-4X and I had an external power supply Hooked up as well,Have just purchased a Data I/O 29B So Hopefully My 2716 woes Are over,I have also Heard the Wellon 380 struggle with them Too.

I have programmed hundreds of 2716 and 2532 with my GQ-4X.

One thing to note about usb power....dont use the front access ports on a pc. They do not provide as much power as the standard rear ports. Also like mentioned, if your programmer has provisions for external power use it. The power pack stays plugged in on mine all the time no matter what im programming.
 
I have programmed hundreds of 2716 and 2532 with my GQ-4X.

One thing to note about usb power....dont use the front access ports on a pc. They do not provide as much power as the standard rear ports. Also like mentioned, if your programmer has provisions for external power use it. The power pack stays plugged in on mine all the time no matter what im programming.

Not all USB ports are the same even thou they should be..
Many moons ago, I traced a problem down the the difference between a nec and a sli chip set that caused issues for a company.

Maybe all that is needed is a quick peek on the pc mother board to see what USB chip is working And compare it to the ones that it is not...

Currently using my 29B to burn. Since all my old EPROM burners use to only work on an apple II plus lol
 
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as mentioned ,there's no provision on the top programmer for an external power source and i'm using the rear USB sockets on the mobo for this so no remote/front ports are being used. won't get to trying again tonight before work but i'll definitely let you guys know what happens tomorrow when i try again.
 
Broodwich really did me a solid!

http://forums.arcade-museum.com/showthread.php?p=2272101

I installed the mod this morning:

IMG_20121116_072839.jpg
 
yea sorry the 2716's didn't want to cooperate atleast we got the 128s to work :D
 
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