That's what I do, and then convert to hex or binary on the receiving computer as needed. There are utilities available for dumping an option ROM as well.
On Tue, Nov 28, 2023 at 1:49 PM runrin <run....@rin.run> wrote: > > This is a good idea, but I've already got my new EEPROM in there and > every time I remove it and put it back in, I get worried I'll break off > one of the legs and have to resolder it. > > The leadframes used to make DIP pins on Brian's FlexROM adapter board > work well, but I really don't want to have to replace them when I > inevitably break one off. > > Would you use a BASIC script to do this Mike? Just a loop to PRINT each > byte to the COM port? > > On Tue, Nov 28, 2023 at 11:45:10AM -0500, Mike Stein wrote: > > Why not just dump it out of the M100 directly? > > > > On Tue, Nov 28, 2023 at 9:50 AM Brian K. White <b.kenyo...@gmail.com> wrote: > > > > > > On 11/27/23 11:48, runrin wrote: > > > > Do you know if it's possible to dump the original ROM using the > > > > programming adapter for the FlexROM 100? > > > > > > Maybe. > > > > > > There are two things to worry about and I'll just think out loud right > > > here. > > > > > > 1 > > > The programming adapter presents a pinout for a 28C256, not a 27C256 or > > > mask rom. Those are only a couple wires different, but then again, since > > > it's just for reading, and the read cycle is the same, you could just > > > tell the programmer that it's reading a 28C256 (force it, override chip > > > id detection), and that won't hurt the rom. > > > > > > 2 > > > Pin 23. The programming adapter routes pin 27 from the programmer (/WE > > > if a 28C256 were in the programmer) to pin 23 of the DIP socket, which > > > is ALE on the LH535618 rom, but the flexrom board connects it to the /WE > > > pin on the actual 28C256 on the board. > > > > > > I *think* what you want to do is take a DIP-28 socket and bend out pin > > > 23, connect the bent-out pin 23 to pin 27, put the modified socket into > > > the programming adapter and then the old rom into the modified socket. > > > Then tell the programmer to read a 28C256 and ignore chip id. The socket > > > is just to avoid bending the leg on the old chip. > > > > > > IE, feed /CE from the programmer to both /CE and ALE on the chip, and > > > don't connect anything to /WE at the programmer. > > > > > > But, at that point it's almost simpler to just make the entire adapter > > > manually with two dip sockets and wires. Especially since it's a > > > one-off. In that case, use a 27C256 pinout and tell the programmer to > > > read a 27C256 instead of 28C256. > > > > > > But if your chip has any of these part numbers, then it's already been > > > dumped. > > > https://bitchin100.com/wiki/index.php?title=Model_and_ROM_information > > > > > > -- > > > bkw > > >
