Friday, November 29, 2024

Believe the Virtual 2315 Cartridge Facility FPGA design is done, undertaking thorough simulations now

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FPGA DESIGN RUNS IN GEORGE WILEY'S RK-05 EMULATOR BOX The emulator was modified from providing virtual RK-05 disk drives into the facili...
Sunday, November 24, 2024

Drat - error in my new PCB for 1627 controller card

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STOPPED DEBUGGING THE BODGED CARD ON THE BENCH Mostly the card was working correctly but I would continue to get flakey behavior that after ...

Various parts for recreation cards

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3D MODEL FOR COVER ON MY REPLACEMENT SLT CARDS Eric Schlaepfer sent me his files for a cover that he used when he created substitute SLT car...
Saturday, November 23, 2024

Disk drive reconnection and one issue

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WIRED UP THE AC POWER CABLE TO THE DISK DRIVE The AC power cable was reinstalled in the disk drive, with the ground wire connected to the AC...
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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...