tarkieI've some of these chips which I got from Ebay a while ago. I *think* they are actually Intel P8041AH's but marked as shown. Can anyone confirm as I can't Google a result. #retrocomputing #intel
DJ🌞
@tarkie as a last ditch effort, feel free to post one to me and I'll decap and image it for you.
🇺🇦 haxadecimal 🚫👑@tarkie Definitive info will be difficult if not impossible to find. The 1977 copyright suggests 8041, 8041A, 8048, or (maybe?) 8049. All had a ROM dump feature for testing, which is perhaps the best way to find out.
@tarkie The 8041/8041A/8048/8049 ROM dump test mode officially requires a 25V power supply.
Since it's not for EPROM programming, it's possible that a lower voltage, perhaps 12V, might be sufficient. The chip has some threshold for detecting the test mode supervoltage, but the min and max values for that threshold are unspecified.
Since it's not for EPROM programming, it's possible that a lower voltage, perhaps 12V, might be sufficient. The chip has some threshold for detecting the test mode supervoltage, but the min and max values for that threshold are unspecified.
@brouhaha #retrocomputing any clue on a programmer. My Dataman 48Pro2 can only read them!
@tarkie These masked ROM parts can't be programmed. If your programmer doesn't offer to read an 8048, you can set it for 8748, the EPROM version, as the 8048 ROM verify mode is the same as the 8748.
My Data I/O is too smart to do that. When set for 8748, it reports an 8048 as mis-socketed, apparently due to the 8048 drawing less current. Most programmers don't check that.
My Data I/O is too smart to do that. When set for 8748, it reports an 8048 as mis-socketed, apparently due to the 8048 drawing less current. Most programmers don't check that.