I could swear these things were as common as housebricks on ebay a year or so ago, but now they're not quite so common...

Hi there, Does anyone have a pair of spare EPROM emulators which are capable of emulating 27C010 EPROMs? Ideally two identical ones, but that's optional. I'm trying to reverse-engineer a Securicor Datatrak MkII navigation receiver and build a signal generator which can emulate a chain of Datatrak transmitters. I'm part of the way there, but I've hit something of an impasse: * My emulator isn't good enough to run the firmware on a PC (it crashes when the RTOS starts to boot). * My knowledge of the hardware is full of holes (especially the simple-but-custom ASIC). Porting a monitor ROM using EPROMs would take a fair while, even with the HP16700A to use as a "debugger". I'd like to try patching the firmware, but with bare EPROMs that'll take a while to get right. I could swear these things were as common as housebricks on ebay a year or so ago, but now they're not quite so common... Incidentally, if someone (preferable in the EEA) has a spare HP 16717A acquisition card (for the 16700A series logic analysers) for sale, I'd be very interested in getting another one -- my second 16717A seems to have died while in storage, and spying on the 68k has eaten up all the pod inputs on my one working card. Thanks, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/