Re: Drum Computers (Was Cleaning things (was Cleaning RK05 packs (Was: LGP-30 Memory Drum Update)))

On 01/07/2017 07:01 AM, Al Kossow wrote: > On 1/7/17 3:06 AM, jim stephens wrote: > >> They did make a tape drive of some sort > > They made several generations, what I've found on their cartridge > tape drives is under 3M on bitsavers. All use variations of their > trade secret or what

Re: Drum Computers (Was Cleaning things (was Cleaning RK05 packs (Was: LGP-30 Memory Drum Update)))

On 1/7/17 3:06 AM, jim stephens wrote: They did make a tape drive of some sort They made several generations, what I've found on their cartridge tape drives is under 3M on bitsavers. All use variations of their trade secret or what eventually became QIC standard tape formats. The 1/4"

Re: Drum Computers (Was Cleaning things (was Cleaning RK05 packs (Was: LGP-30 Memory Drum Update)))

On January 7, 2017 5:06:32 AM CST, jim stephens wrote: > > >On 1/6/2017 6:46 PM, Rick Bensene wrote: >> Today, there seems to be no record that 3M ever was in the computer >business. But...it was. >They inflicted the write only media on the world that became QIC. So >they

Re: Drum Computers (Was Cleaning things (was Cleaning RK05 packs (Was: LGP-30 Memory Drum Update)))

On 1/6/2017 6:46 PM, Rick Bensene wrote: Today, there seems to be no record that 3M ever was in the computer business. But...it was. They inflicted the write only media on the world that became QIC. So they were in the biz long enough to do that. Media never intended to be recorded at the

RE: Drum Computers (Was Cleaning things (was Cleaning RK05 packs (Was: LGP-30 Memory Drum Update)))

Allison wrote; >I envy the chance to restore a LGP-30 or for that fact play with one. >Many of the things I remember >mid sixties on are now gone or were rare then. Like small desk sized drum >computers using transistors or first generation IC (RTL and RDTL). I so regret not having rescued