eBay Finds (was: Ebay Posts was...)

Yes, but I wonder whose actual bubble memory part is inside the cartridge. Do you have a broken one to sacrifice for the quest for arcane knowledge? I wonder whether they put the bubble controller inside the cartridge. Probably not, since there was no sense in duplicating that cost. The only manufacturers that I heard of were: vendor capacity capacity (bits) (bytes) ------ -------- -------- Intel 1M 128K Intel 4M 512K rare? Rockwell ??? ??? TI ??? 92K Although it's certainly possible that other companies might have tried their hands at it. There was a time when everyone was convinced that bubble memory was the next big thing. Bubble memories had a rated capacity based on a maximum number of defective loops. The Intel parts had a dot-matrix printed label with a long hexadecimal map of the good loops. I think they might have also come with a small PROM containing that data. Intel's 1Mbit bubble memory controller was the 7220. Unfortuantely NEC made a somewhat popular graphic display controller/processor that also is a 7220.