So I've got 3 NAOMI1 boards and 1 NAOMI2 board and I need new BIOS chips for all but 1 of them as I bought a Rev H bios from Summit back when I got my first NAOMI.
I decided it was time to buy an EPROM burner as I also have an MK2 PCB that needs new ROMs burned.
I bought a brand new GQ-4X from MCU Mall as well as the ADP-054 adapter and a UV eraser.
Here's where I'm at.
The adapter board is aligned at the bottom of the Ziff socket, the chip is aligned at the bottom of the adapter socket with the notch at the top. Jumper 1 is set to 1-2 which should be correct for this chip. I'm using an external power supply for the burner to ensure the voltages are good. and verifying voltages in the hardware test menu says it passes perfectly.
I have 1 spare M27C160 BIOS chip that wasn't being used, it worked but it was a rev A so it was mostly useless. I got the drivers installed and the programming software installed. I was able to read and verify the data on the chip, I put it in the eraser and was able to use the programmer to verify that it was fully erased. But when I go to write I get a write failed message pretty much immediately:
Write failed, Address=0x000004, Buffer=0x39 Device=0x38
Reading back from the chip after the failure shows that the first few bytes were written and that's it...
FFE3 2843 39FF FFFF FFFF FFFF FFFF FFFF...
it should be:
FFE3 2843 3964 1843 0944 0944 3950 0A24...
Then I have to erase the chip again before I try again.
I've heard that the V3/V4 jumper should be changed if there are problems but it doesn't seem to make a difference.
I don't think I'm doing anything wrong. I'm doing exactly what the instructions and every guide I've read says to do. but if anyone has any advice it'd be appreciated.
I decided it was time to buy an EPROM burner as I also have an MK2 PCB that needs new ROMs burned.
I bought a brand new GQ-4X from MCU Mall as well as the ADP-054 adapter and a UV eraser.
Here's where I'm at.
The adapter board is aligned at the bottom of the Ziff socket, the chip is aligned at the bottom of the adapter socket with the notch at the top. Jumper 1 is set to 1-2 which should be correct for this chip. I'm using an external power supply for the burner to ensure the voltages are good. and verifying voltages in the hardware test menu says it passes perfectly.
I have 1 spare M27C160 BIOS chip that wasn't being used, it worked but it was a rev A so it was mostly useless. I got the drivers installed and the programming software installed. I was able to read and verify the data on the chip, I put it in the eraser and was able to use the programmer to verify that it was fully erased. But when I go to write I get a write failed message pretty much immediately:
Write failed, Address=0x000004, Buffer=0x39 Device=0x38
Reading back from the chip after the failure shows that the first few bytes were written and that's it...
FFE3 2843 39FF FFFF FFFF FFFF FFFF FFFF...
it should be:
FFE3 2843 3964 1843 0944 0944 3950 0A24...
Then I have to erase the chip again before I try again.
I've heard that the V3/V4 jumper should be changed if there are problems but it doesn't seem to make a difference.
I don't think I'm doing anything wrong. I'm doing exactly what the instructions and every guide I've read says to do. but if anyone has any advice it'd be appreciated.
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