Re: scary warning about bubble memory loop mask, TI 763/765 maint manual

2017-08-06 Thread Eric Smith via cctalk
On Aug 6, 2017 08:20, "dwight via cctalk" wrote: I wonder if they can be reset by just removing the bias magnets. The bias field is needed to maintain the domains in the material. With the Intel bubble parts, if they get erased, you have to use special electronics and procedure to recreate the

Re: scary warning about bubble memory loop mask, TI 763/765 maint manual

2017-08-06 Thread dwight via cctalk
, 2017 6:00:15 AM To: cctalk@classiccmp.org Subject: Re: scary warning about bubble memory loop mask, TI 763/765 maint manual the terminals pop up on eBay every so often. I picked up a couple in poor physical condition as donor machines for the one clean one I've found On 8/5/17 10:56 PM,

Re: scary warning about bubble memory loop mask, TI 763/765 maint manual

2017-08-06 Thread Al Kossow via cctalk
the terminals pop up on eBay every so often. I picked up a couple in poor physical condition as donor machines for the one clean one I've found On 8/5/17 10:56 PM, Eric Smith via cctalk wrote: > With Intel devices, there is a special "seed module" and procedure that can > be used to recover bubb

Re: scary warning about bubble memory loop mask, TI 763/765 maint manual

2017-08-05 Thread Eric Smith via cctalk
On Aug 5, 2017 19:42, "Chuck Guzis via cctalk" wrote: My recollection is that the track data was printed by Intel. At least mine came that way. Both Intel and TI printed the bad loop map/mask on the device label. Intel also programmed the map into a special "boot loop" in the device; TI did n

Re: scary warning about bubble memory loop mask, TI 763/765 maint manual

2017-08-05 Thread Chuck Guzis via cctalk
On 08/05/2017 06:29 PM, Eric Smith via cctalk wrote: > Bubble memory devices typically have many minor loops, not all of > which are usable. TI printed mask data on the label of the bubble > device, identifying the defective loops. When a bubble memory board > is installed or replaced in the ter