help me get a eprom burner

[SuperGunGuru]

Finally pulled the trigger on one of these GQ 4X programmers last week. It arrived today but wouldn't you know it one of the LEDs on the the case is broken and you can hear it rattling inside. MCUMall Electronics has a good eBay rep and accepts returns so I'm sure it'll work out, but I was really hoping to fix a game with this thing tonight. Oh well. Other than that I wish they would have included a hard copy of the manual, but I'll be at the computer to use the thing anyway.

 

[discgolfer72]

i just posted a comment in that wtb thread you posted in lol
i went with the cheapo
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220621768463&ssPageName=STRK:MEWNX:IT
and this eraser
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130376024615&ssPageName=STRK:MEWNX:IT

just finished setting up a workshop pc as well since my pc wouldent know what to do with a parallel port lol

 

[channelmanic]

Sometimes you have to dig on Craigslist for a free P3 system just to have a good parallel port.

 

[gottifour]

i just posted a comment in that wtb thread you posted in lol
i went with the cheapo
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220621768463&ssPageName=STRK:MEWNX:IT
and this eraser
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130376024615&ssPageName=STRK:MEWNX:IT

just finished setting up a workshop pc as well since my pc wouldent know what to do with a parallel port lol

Let me know how the burner works for ya! I have the same one and am having problems. It's probably user error on my part though!

 

[discgolfer72]

Sometimes you have to dig on Craigslist for a free P3 system just to have a good parallel port.

im lucky enough
i used to do a lot of pc repair and i have stocked up on old motherboards i saved for building dos based mame rigs and messing with linux distros
i was able to peice this beast togather

its an old asustek motherboard a8s-la(its a stinking oem compaq motherboard)wich im having a heck of a time finding sound drivers for (got all the chipset and vga drivers)asus does not support it because its a oem board

but ill just go out tommorow and snag a cheap sound card (since i cramed a 500 gb hd in it id like to at least jam to some tunes on it as well)and be done with it

im actually in my shop now typing this on it

shes kinda slow but for selling on ebay ,bsing on here ,and programing chips it should be plenty

 

[RetroHacker]

Yeesh. That's hardly "kinda slow", but I guess if you're running Windows it is...

My main PC is an AMD Athlon 2600+.

The EPROM programmer lives on a machine that I consider "kinda slow" - a 486/DX2 66mhz.

-Ian

 

[discgolfer72]

Yeesh. That's hardly "kinda slow", but I guess if you're running Windows it is...

My main PC is an AMD Athlon 2600+.

The EPROM programmer lives on a machine that I consider "kinda slow" - a 486/DX2 66mhz.

-Ian

lol well im used to my baby
wich is a 3.2 amd64 dual core black tweaked to 3.4( i can come close to 4.0 but its to unstable) with 8 gig ddr2 800 ram, 2 gts 250 1 gb graffix in sli ,and a dedicated psy-x card wich is a old 8600gt 512
so really almost anything seems slow to me lol

pluss this thing is on wireless ,with 1 bar of conectivity (workshop is in basement router is on the 3rd floor) so using the net is kinda like pulling teeth

 

[discgolfer72]

wee got my eraser and burner today

now i have a few ?
i picked u the PCB5.0E Willem EPROM programmer
1
is usb power enough to program 2764-27512 chips (if not what kind of power brick do i need to buy pcb has a stamp that says 9v-12v but what amps)

2
does voltage matter when verfiy blank (i have had 12 chips sitting in the sun for the past 2 days and none are verfiying blank)

3
i was able to verfiy data on a legends of zelda chip i had my buddy rip for me (i recreated the file on my pc from the .nes file then verfiyed the chip aganst that) but the program he was using had a diffrent gui that had a white box that showed the data while verfiying in hex and when erasing the data not erased
can i use a diffrent gui and if so where can i find one


thanks guys hopefully the chips i threw in my eraser wont take to long to erase

 

[RetroHacker]

(i have had 12 chips sitting in the sun for the past 2 days and none are verfiying blank)

You can't erase EPROMs in the sun. At least, not with all that pesky atmosphere in the way. True, you can *corrupt* EPROMs with sunlight, and they'll start losing bits here and there, but they won't be blank. The sun just doesn't put out enough UV for that. You need a real UV light source from an EPROM eraser or similar to really erase a chip.

I once repaired a Donkey Kong Jr. board that had been laying in a cabinet, back open, in facing sunlight for probably years. The red label on the picture tube had faded completely white. All the EPROMs on the exposed side of the board were corrupt - but they were far from blank.

-Ian

 

[discgolfer72]

lol yea i was just tyring to get some progress before the eraser and burner got here

tho we did erase 1 or 2 at my buds by placing them in the sun(but that was after they were in an eraser and would not fully erase)

 

[discgolfer72]

well burnt my first set of chips (kid icarus) and it worked perfect
but im still having problems with my pc10 board
all my games work great but smb rad racer(with either zelda rr or kid icarus chips) and galaga all end up having problems

so back to the drawing board trying to figure out what component on my board is bad

next im going to try and figure out what chips i need to replace on my marvel super heroes vs streetfighter cps2 board to pheonix it

ps anyone wanna take a shot at helping me with my pc10 board problem
http://forums.arcade-museum.com/showthread.php?t=144049

 

[discgolfer72]

god x$X@ #$@#$ng stinking 2764's lol spent hours now trying to erase and burn 1 rom for the gfx chip on a pc10 cart out of 20 2764's i have only gotten 3 of them to erase and burn

argggggggggggggg

 

[RetroHacker]

How long did you have them in the eraser for? If you cook them for too long, you can damage them.

-Ian

 

[gottifour]

god x$X@ #$@#$ng stinking 2764's lol spent hours now trying to erase and burn 1 rom for the gfx chip on a pc10 cart out of 20 2764's i have only gotten 3 of them to erase and burn

argggggggggggggg

I'm in the same boat as you! I'm new to burning but I have the same burner as you and I'm having the same problem with 2764's. They seem to be verified erased but I have only gotten one to burn out of about 30. Its it the burner or something I'm doing wrong? Hmmmmmmm.

 

[RetroHacker]

You guys *do* realize that there are different types of 2764, with different programming voltage requirements. Some of them need 21v, others need 12.5. For example, an AMD 2764 needs 21v, but an AMD 2764A needs 12.5. You have to set your burner accordingly.

-Ian

 

[discgolfer72]

How long did you have them in the eraser for? If you cook them for too long, you can damage them.

-Ian

started at 30min then 1 hour
and everywhere in betwene

as for the chips
i have amd 2764-30
and esquee(or somthing like that ) 2764(no other number)

i have gotten a few of the amd chips erased and programed (burnt 2 u2 chips and a bios chip ) and was able to get 2 u2 chips burnt from the esquee brand so i think im ok on how im burning them and eraseing them

i think my big broblem is theay all came from an old rotten pole position board that had rom problems to begin with

 

[RetroHacker]

EPROMs are pretty durable, I very rarely find bad ones. Make sure that you are getting the windows on the chip nice and clean - I clean them with goo gone to remove adhesive, then alcohol to clean off any other residue. If there is junk on the window, then they won't erase properly. A half hour is pretty long, longer than it should take. Generally I put them in for 6 to 8 minutes, but I have a pretty powerful eraser.

If you have a stubborn chip, try programming it full of zeroes, and then erasing it again.

-Ian

 

[discgolfer72]

EPROMs are pretty durable, I very rarely find bad ones. Make sure that you are getting the windows on the chip nice and clean - I clean them with goo gone to remove adhesive, then alcohol to clean off any other residue. If there is junk on the window, then they won't erase properly. A half hour is pretty long, longer than it should take. Generally I put them in for 6 to 8 minutes, but I have a pretty powerful eraser.

If you have a stubborn chip, try programming it full of zeroes, and then erasing it again.

-Ian

yup im cleaning them with alchol first
and have tried writing 0's but i on several they start to program (really slow)then i get a buffer error ill try changing voltages
is there a site that has a database of voltages for diffrent chips
i just did a google search and found nothing

 

[RetroHacker]

is there a site that has a database of voltages for diffrent chips
i just did a google search and found nothing

The programming voltage is usually printed on the top of the chip. Failing that, you can look up the datasheet for the chip on google.

I've never used the programmer that you have, but my programmer already has a database of chips built into the software. You just select the chip you have and it automatically fills in the proper voltage and settings. It's sorted by manufacturer.

-Ian

 

[discgolfer72]

the software on my programer goes as far as diffrence betwene 2764 and 72c64 but thats about it


the suck thing is the wirless adaptor on my workshop pc is having a heck of a time connecting to my router so i have to run to the 3rd floor all the time if i need to check stuff on the net

i have been using my (jailbroken)iphone to connect down there using a app that turns the phone into a hot spot

but it uses the 3g net and is slower than a bastard

it would be nice to find a pdf data sheet with the most common chips and their voltages