Thanks for that tip! My cheap little TL866CS of course does not support the Sharp LH535618 so I’ll need to make an adapter.
While I agree the ROM is not a usual failure point they can fail. I may just go ahead and order an 80C85 but I hate to throw parts at it. The fact that the IO/M does not change states when it is ‘running’ (it does change states on reset) bothers me. Even if it were running garbage code due to an address/data latch issue what are the odds that it would never try to address the IO address space? Thanks, Jeff From: M100 <[email protected]> On Behalf Of Brian White Sent: Monday, April 30, 2018 5:49 PM To: [email protected] Subject: Re: [M100] SPAM-LOW: Re: New member - question on 'half' alive Model 100 Also remember, the pinout is not 27C256. So you'll need to use two dip28 sockets (or at least one) and 28 wires to relocate some of the pins to read the rom in a reader. http://bitchin100.com/wiki/index.php?title=Model_100_ROM On Mon, Apr 30, 2018 at 6:06 PM, John R. Hogerhuis <[email protected] <mailto:[email protected]> > wrote: Seems like the mask rom would be the least likely thing to fail, but I suppose it's possible. Keep in mind it's not an EEPROM that can get erased though. -- John. -- bkw
