Comments on: Hammond XB-2 ROMs?

By: Matthew Toll

Matthew Toll — Wed, 14 Jul 2021 13:49:53 +0000

I’m looking for V1 ROMs if anyone has them or knows a source. Thank you

By: Jim

Jim — Sun, 11 Oct 2020 14:56:40 +0000

Did anyone find the roms? I have good XB-2 roms. They are from the XB-2N not sure if they are different the XB-2N does not have the reverb board.

By: vittoles

vittoles — Wed, 10 Oct 2018 14:03:21 +0000

Hi
interested in the Rom files too!
let me know if you can send it to me.
best regards.

By: Gioacchino Venuti

Gioacchino Venuti — Thu, 08 Sep 2016 09:19:34 +0000

Can you send me a copy of the Rom in file .hex or .bin or if you can send me the two chip roms at this address “Gioacchino Venuti, via abruzzi 2/D, Grottaglie (TA), italy”. If you decide to sand me the two chip roms, tell me how much is it.
Gio

By: XB2

XB2 — Tue, 17 May 2016 23:42:56 +0000

I have a XB-2 with V2 roms.
It does not work but maybe the ROMS are Ok,

By: Gioacchino Venuti

Gioacchino Venuti — Wed, 13 Apr 2016 07:04:09 +0000

She found then has the v 2 or EEPROM files for ‘ Hammond XB- 2 ?
Gio.

By: Tweety_B2

Tweety_B2 — Mon, 28 Sep 2015 03:40:12 +0000

I have a XB2 not working. not sure if the eeproms are ok (V2). it shows all ok on lcd but sounds awful. Interested to compare my roms with yours.

By: Laci Biro

Laci Biro — Tue, 01 Mar 2011 09:39:25 +0000

I have a similar problem: the ROMs in my old XB-2 are defective and I’m unable to find V2 images in order to burn a new set.

By: Merlin Skinner

Merlin Skinner — Wed, 23 Feb 2011 13:26:16 +0000

I have seen EPROMs with “flaky” bits. Presumably the charge has decayed to a point near the threshold of the sense circuitry. I can’t think of any mechanism that would make the bit latch in the flipped state – it would just more more and more likely to be read incorrectly. Light falling on the chip can also cause this.

Joe Koberg’s idea of varying the supply voltage is likely to be a good strategy, as the EPROMS I had were sensitive to this. At least some programmers (e.g. DataIO) allow you to select the voltage (4.5/5.0/5.5V, perhaps). Heating as well as cooling (hairdryer/freezer) is very likely to affect this threshold as well.

Good luck!

By: Joe Koberg

Joe Koberg — Sun, 13 Feb 2011 15:38:49 +0000

You may also try reading with different voltage levels supplied to the chip; and even perhaps with the chip cold. These are just shots in the dark. It’s my understanding that once the cell has flipped back (lost its stored charge), it’s flipped for good.