TF536 on A2000

[dalek]

@matt020 have you tried the TF536 without the A2091 installed?

[matt020]

@matt020 have you tried the TF536 without the A2091 installed?

I didn't, I really felt that because I was having the same results as other people, removing the A2091 would'nt make any difference. In hindsight, I probably should have removed it..

Of the other people here who are having TF536 and A2000 problems, do you have any cards plugged into the Zorro slots??

[ericgla]

I had all cards removed during my tests...

[8 Bit Dreams]

Maybe it's worth to recompile rev.1 FW we used to rev.2 pcbs and check does it work on A2k or not...🤔

[terriblefire]

Just flash the working rev1 firmware in the rev2. IDE will not work everything else is unchanged.

[Maximilian]

The A2000 has a lot of resistor packs near the 68000 socket, could it be a termination issue due to the pull ups on A24-A31?

[terriblefire]

The A2000 has a lot of resistor packs near the 68000 socket, could it be a termination issue due to the pull ups on A24-A31?

A24-A31 are entirely internal to the TF536.. so its not likely. Its more likely an issue with the clock phase control.

[ericgla]

I flashed my board back to the rev1 firmware.

Same behavior as before with the 3.1 rom, flashing bars followed by a black screen.

DiagROM 1.2 doesn't get as far as before, hanging during the fastmem check. I did try to plug in a mouse to to cancel fastmem detection, but with a mouse connected DiagROM only sends <> to the serial port, and hangs showing a blue screen.

[ericgla]

I forgot to mention in my previous post that I have a 24 MHz 8 channel logic analyzer (a cheapo china one) on my bench, and would be happy to do any signal captures on my rev6 board that might help identify the issue...

[GadgetUK164]

Is it possible the SMD component sizes fitted by the PCB manufacturer are the wrong size or something (on the underside). eg. resistor arrays, resistors.