How many times do I have to write plcc in one mail? :) Physically it's all identical to the previous 27C256 plcc version.
I am currently using the 27C256 version in 2 M100's already, so the physical fit is tested. Just to be clear, it requires desoldering the original dip socket and putting this adapter in it's place. And the adapter has a plcc socket on it. So in the end you have a socketed standard 28C256 instead of a socketed non-standard LH535618. And you can re-program the eprom without any special adapters or a test-clip, because the eprom itself comes out by itself. It's only for the early model 100's of course. Later ones you just use a 27C256 DIP with no adapter. -- bkw On Jun 1, 2016 10:10 PM, "Stephen Adolph" <[email protected]> wrote: > Nice find. Ebay source or retail? > Let us know if there is just enough space. Is the 28c256 a dil package? Or > soic? > > On Wednesday, June 1, 2016, Brian White <[email protected]> wrote: > > https://oshpark.com/shared_projects/bCqiBZLI > > > > This same guy had a 27C256 version, but erasable 27C256 lcc are really > hard to find. You can buy OTP parts new, but not erasable. > > > > So he made a 28C256 version. You can still buy new 28C256 plcc. > > > > Maintaining a socket of some form is more important than I realised at > first because I wasn't aware that eproms and eeproms might lose bits in as > little as 10 years. So an eprom/eeprom absolutely will need to be > re-flashed again sometime. > > > > I found these low profile round pin headers to use with it. You need > both qualities, round pins and close spacing between the motherboard and > the module. > > http://www.king-cart.com/phoenixent/product_name=HWS5231 > > > > Untested yet. I'm ordering now. > > > > -- > > bkw
