Tuesday, November 19, 2024

Assessing a location for the Virtual 2315 Cartridge Facility interface board

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MOST COMPONENTS SOLDERED ON INTERFACE BOARD I had a few hours in the workshop in between time spent with family visitors. I soldered on the ...

Parts arrived to build Virtual 2315 Cartridge Facility interface board

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PCB ARRIVED ALONG WITH THE PARTS This board is the interface between the IBM 1130 disk controller logic, the 2310 disk drive and the modifie...
Saturday, November 16, 2024

Still testing substitute 5806223 card to support 1627 plotter on the IBM 1130

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AFTER ERROR OF MISSING PULLUP, STILL HAVE ERRONEOUS BEHAVIOR The card was producing the 1.9 ms and 50 ms output pulses now. More importantly...
Thursday, November 14, 2024

More testing of 5806223 replacement card and redesign to eliminate donor card requirement

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CONVERTING THIS TO A DIRECT SLT CARD CONNECTOR ON THE PCB I found some spring contact parts that would allow me to make a compatible end on ...

Disk drive bolted back inside IBM 1130 - without additional people

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SPENT TIME MEASURING, VISUALIZING MOVEMENTS AND PLANNING STRATEGIES The disk drive won't slide in from the front nor the back as the ver...
Monday, November 11, 2024

Another possibility for eliminating need for donor SLT cards when making substitute cards

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SMT SPRING CONTACTS MIGHT ALLOW ME TO MAKE PCBS WITH INTEGRAL SOCKETS I found some gold plated spring contacts that are .098" wide and ...
Sunday, November 10, 2024

Wrapping up disk drive work, ready to install back in the IBM 1130

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VERIFIED WRITE LOGIC AND WRITE CLOCK OUTPUT The 2310 drive is formally called the 13SD and had the project name Ramkit. It is installed insi...