Anyone know of any way I can get this to work with an NXP P89C51RD2BA?
I have a device that uses a P87C51RB2BA (PLCC44), and I want to experiment with firmware modifications, but the P87 is only OTP (one-time programmable, like a CD-R.) So I bought the P89 chip, since it's rewritable and has the same exact pin configuration. I forgot to check the list of supported chips and it turns out it wasn't in the list, but I figured it would likely be compatible, even though I wasn't positive, so I didn't cancel the order. It arrived today, and I tried telling the software it's a P87C51RD, but apparently it isn't compatible enough.
Is there any way I can get it to work? Any supported chips that are compatible enough with the P89 that it will work if I choose that one? Is there some kind of unofficial patch or something I can install to add support? Barring that, does anyone know of any chips that will work in a device in place of a P87C51RB2BA, that can be programmed more than once? I want to experiment with the code, but I don't want to buy a whole bunch of blank chips.