[PROBLEM] 4850 Bios pin mod (After Change Device ID, not recognized by atiflash)

[reny28]

hello,

I have a ATI 4850 512MB (21132-00-20R)
I can not find that I have to reset the bios chip, I changed DeviceID with RBE (4850 to 6850) and now is no longer recognized, even by atiflash ...
where is the chip? chip found
I posted a guide (link) on how to do it?
thanks
ps: I log on Windows, but there are no drivers ("no data available")!
I need to know how to proceed

 

[Frogger]

read here

 

[reny28]

thank you for your reply, I tried to short-circuit 1 and 8, 1 and 4, and finally 4 and 8 (VCC and GND)

finally recognized the card but:
-does not make me start Windows (some beeps at startup). then within the video card Integrated (G31M-GS)

-I can not flash anything on the bios, Write Fail: error 0FL01

thanks

 

[Deleted member 24505]

Tried winflash?

http://www.techpowerup.com/downloads/2107/ati-winflash-2-0-1-18/

Cant hurt to try can it, if your card is showing on windows, it might work.

EDIT balls, I just noticed you tried it.

 

[W1zzard]

you pull chip enable high, so the chip is disabled. this should let you boot.

once you are at the dos prompt you need to pull it low (while the system is running), so the rom chip gets enabled and can be flashed.

now start the flasher, it should flash.

reboot, you can leave chip enable as is, the card should work fine

dont connect gnd and vcc together as that will cause a short circuit

 

[reny28]

you pull chip enable high, so the chip is disabled. this should let you boot.

once you are at the dos prompt you need to pull it low (while the system is running), so the rom chip gets enabled and can be flashed.

now start the flasher, it should flash.

reboot, you can leave chip enable as is, the card should work fine

dont connect gnd and vcc together as that will cause a short circuit

I'm sorry but they are not very practical!
I do not quite clear which pins should I connect, you may watch the immaggine and tell me which pins should I connect?
I have to start with the integrated? or with PCI?
when I have to disconnect the wires?
to activate the chip ROM, I have to run the command <atiflash -unlockrom 0>?

thanks, I really appreciate your help

EDIT:

Pins 1 and 8 connected (CE # and VCC) (see immaggine):

atiflash -f/-fa/-fm/-fs/-fp -p 0 ati.rom/rv770.bin
Write fail
Error 0FL01 ...


TEST ROM:

atiflash -t 0
PASS

 

[Deleted member 24505]

I'm sorry but they are not very practical!
I do not quite clear which pins should I connect, you may watch the immaggine and tell me which pins should I connect?
I have to start with the integrated? or with PCI?
when I have to disconnect the wires?
to activate the chip ROM, I have to run the command <atiflash -unlockrom 0>?

thanks, I really appreciate your help

EDIT:

Pins 1 and 8 connected (CE # and VCC) (see immaggine):

atiflash -f/-fa/-fm/-fs/-fp -p 0 ati.rom/rv770.bin
Write fail
Error 0FL01 ...


TEST ROM:

atiflash -t 0
PASS

1. connect pins 1 and 8 leave them connected
2. boot up on integrated graphics
3. once it boots up to the dos prompt, disconnect the connection from pin 1 and 8
4. now start the flasher, it should flash

 

[W1zzard]

once it boots up to the dos prompt, disconnect the connection from pin 1 and 8

you probably need to connect 1 and 4 at that point to pull the input low, unless it has its own pulldown resistor

 

[reny28]

http://img.techpowerup.org/130618/uab.png

1. connect pins 1 and 8 leave them connected
2. boot up on integrated graphics
3. once it boots up to the dos prompt, disconnect the connection from pin 1 and 8
4. now start the flasher, it should flash

unfortunately does not go ...
"write fail error ..."

the chip is damaged?

 

[Law-II]

Hi

unfortunately does not go ...
"write fail error ..."

the chip is damaged?

No/Maybe

atiflash -f/-fa/-fm/-fs/-fp -p 0 ati.rom/rv770.bin
Write fail Error 0FL01 ... TEST ROM: atiflash -t 0
PASS This command line is wrong or the vbios is the wrong one

Manufacturers Name? and Model of the vga card [add link to card], please

If booting using onboard Igp/vga intagrated in CPU or onboard vga = 0 [Zero] (atiflash has this error as it attempting to write to the) integrated graphics
HD 4850 vga card = 1

Type at the dos prompt: atiflash -ai 1 [see if the HD 4850 is recognised]
Type at the dos prompt: atiflash -t 1 [see if the HD 4850 vbios passes]

*If HD 4850 vga card is recognised
Type at the dos prompt: atiflash -f -p 1 [#BiosName#].ROM

atb

Law-II

 

[reny28]

Hi

No/Maybe



Manufacturers Name? and Model of the vga card [add link to card], please

If booting using onboard Igp/vga intagrated in CPU or onboard vga = 0 [Zero] (atiflash has this error as it attempting to write to the) integrated graphics
HD 4850 vga card = 1

Type at the dos prompt: atiflash -ai 1 [see if the HD 4850 is recognised]
Type at the dos prompt: atiflash -t 1 [see if the HD 4850 vbios passes]

*If HD 4850 vga card is recognised
Type at the dos prompt: atiflash -f -p 1 [#BiosName#].bin

atb

Law-II

hi, i have ATI 4850 512MB (21132-00-20R)
I'm using onboard vga of G31M-GS
I tried atiflash -i/-ai 1 "adapter not found"
I tried to remove the 4850 from the PCI slot, and I gave the command from DOS atiflash -i/-ai 0/1 "adapter not found"

thanks

 

[reny28]

you probably need to connect 1 and 4 at that point to pull the input low, unless it has its own pulldown resistor

try...

edit:
write fail error...the same as before

 

[Law-II]

Hi

hi, i have ATI 4850 512MB (21132-00-20R)
I'm using onboard vga of G31M-GS
thanks Thanks for the info

Try this vbios image - http://www.techpowerup.com/vgabios/16834/sapphire-hd4850-512-080602.html

I tried to remove the 4850 from the PCI slot, and I gave the command from DOS atiflash -i/-ai 0/1 "adapter not found" Card should be installed during this process; *do not remove card

Onboard vga is selected in motherboard bios as primary device?

Read Here

With Pin 1 & 8 connected to vga card's vbios and card installed to PCIe Slot adapter is found at 0 [zero] left wire attached to pin 1 & 8 ran command atiflash -ai at position 0 or 1 at dos prompt [adapter found? at 0] cut wire and flashed vga card atiflash -f -p 0 #Bios Name#.ROM

[when booting from onboard vga card is at 0 zero? odd]

Motherboard is this

atb

Law-II

 

[reny28]

Hi



Try this vbios image - http://www.techpowerup.com/vgabios/16834/sapphire-hd4850-512-080602.html I've already tried, tried both with this and with the original backup



Onboard vga is selected in motherboard bios as primary device? Yes

Read Here already read a couple of times

With Pin 1 & 8 connected to vga card's vbios and card installed to PCIe Slot adapter is found at 0 [zero] left wire attached to pin 1 & 8 ran command atiflash -ai at position 0 or 1 at dos prompt [adapter found? at 0] cut wire and flashed vga card atiflash -f -p 0 #Bios Name#.ROM

[when booting from onboard vga card is at 0 zero? odd]

Motherboard is this yes

atb

Law-II

as i wrote before, when i remove the VGA (PC turned off, normally) from the PCI slot, Atiflash with the commands "atiflash-i 0/1" does not detect any card

I turn off the PC and get back the card into the PCI slot, boot from the onboard VGA, and with the command "atiflash-0".. atiflash detect the card

i turn off the computer and connect pins 1 and 8 and once in DOS, cut the wires and try but always gives me that damn error: ERROR WRITE FAIL 0FL01

I think I burned the bios of the card, since I had also attacked VCC to GND (knowing full well what I was doing)

thanks

 

[Law-II]

Hi

I think I burned the bios of the card, since I had also attacked VCC to GND (knowing full well what I was doing)

Indeed that may have damaged the vrom; sorry to hear of your loss

atb

Law-II

 

[reny28]

Hi



Indeed that may have damaged the vrom; sorry to hear of your loss

atb

Law-II

thanks for the help

one last thing, if I replace the bios chip PM25LV512 with an identical one ($ 2.70) could solve? I am very good with the soldering

and if I take the bios of a sapphire ati x1600 and install it on the 4850? I do not know much about bios but I understand that it is similar to a ROM, you just flashing in the right data

 

[Frogger]

if I replace the bios chip PM25LV512 with an identical one ($ 2.70) could solve?

YES will solve

and if I take the bios of a sapphire ati x1600 and install it on the 4850

NO use the bios here http://www.techpowerup.com/vgabios/1...12-080602.html

 

[reny28]

YES will solve

NO use the bios here http://www.techpowerup.com/vgabios/1...12-080602.html

the chip that costs $ 2.70 is "empty" and there I will have to flash the rom

but I wanted to know if I can recover from a x1600 chip, solder it on the 4850 and flash the rom of 4850

 

[Frogger]

but I wanted to know if I can recover from a x1600 chip, solder it on the 4850 and flash the rom of 4850

YES you will have to use the 8--to--1 pin mod to do the reprogram on the chip

 

[Deleted member 24505]

If you put the x1600 ROM chip on your card, you would treat it just as if you had flashed the wrong bios.