Folks,
John White, with whom I worked at Bridgewater College (VA; circa 1967-1970) had musical talents (I have none). Somewhere he came up with FORTRAN instructions that caused the RF emissions of the CPU to be predominately a certain frequency. He would place a radio on the console to the right of the Selectric typewriter and we could definitely listen to his interpretation of Johnny Cash melodies.
Miles Sandin
In the beautiful Shenandoah Valley of Virginia, aka “The Breadbasket of the Confederacy”.
But true... I don't know who wrote it, but we had a copy of a program that played music by rf interference.
Bob
Let me weigh in for the first time. I was one of the engineers that developed the 1130 at the IBM San Jose Development Laboratory. My first responsibility was the 13RK “Ramkit” attachment design.
If memory serves, the first single-disk drive used one stepper. The later 44RK used two and had one-half the average access time. It appears the 1130 you gentlemen have lovingly restored has the later disk drive.
Thanks for the memory.
Regards,
Paul Duggan
Truckee, California USA
From: ibm...@googlegroups.com [mailto:ibm...@googlegroups.com] On Behalf Of Joel Kollin
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Clare,
The 2311 was available on the 1130. Each platter was treated like a separate 2310 disk.
Folks,
I may have commented on this before. In our Service Bureau operation, we enhanced the 1130 by attaching Logicon equipment. It utilized a multi-platter drive and used 4 of the platters as 2310 type disks and the rest was a giant (for the day) “bulk” area.
We also had a Logicon paper tape reader, a Logicon 600 lpm printer and a Logicon 9 track ½” magnetic tape drive. We also had a Logicon async 1200 baud communication adapter. We had clients using the Texas Instruments 942 programmable terminals. The 942 used the Intel 4004 chip processor. They had dual cassette drives, one for input programs we wrote for the client’s applications, the other accumulated the data. During the evening hours, our operator would use the 1130 to “Poll” the 742’s which were sitting there waiting to be contacted. Then we would read the data into the 1130, process it creating invoices, reports, etc and then use a courier to send it back. We had numerous clients around the state of VA that we serviced this way.
Those were interesting and challenging times.
Miles Sandin
Bridgewater VA
From: ibm...@googlegroups.com [mailto:ibm...@googlegroups.com] On Behalf Of Bob Flanders
Sent: Saturday, August 11, 2012 10:49 AM
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