Uploaded November 2022 | Updated September 2026, 2 weeks ago
This is a demonstration on how to enable the DCP (Diagnostic Control Program) of the IBM 5100, then use it to enter a brief PALM machine code sequence of instructions. This program displays the full set of characters built into the display card and projected onto the CRT.
Also showing how key presses are processed in the Level 3 interrupt and scan code results stored in registers, which can be read as memory offsets.
NOTE: This video is a practice to a longer upcoming video about the tape unit (in terms of lighting and avoiding glare on the screen and how to show both the screen and what keys are being pressed).
The program that was entered is described in greater detail at the following link:
https://voidstar.blog/ibm-5100-character-sets/
For general topics about the IBM 5100, see:
https://voidstar.blog/ibm-5100-personal-computer/
And for details of how this particular IBM 5100 was obtained:
https://voidstar.blog/ibm-5100-5110-sources/
This is a demonstration on how to enable the DCP (Diagnostic Control Program) of the IBM 5100, then use it to enter a brief PALM machine code sequence of instructions. This program displays the full set of characters built into the display card and projected onto the CRT.
Also showing how key presses are processed in the Level 3 interrupt and scan code results stored in registers, which can be read as memory offsets.
NOTE: This video is a practice to a longer upcoming video about the tape unit (in terms of lighting and avoiding glare on the screen and how to show both the screen and what keys are being pressed).
The program that was entered is described in greater detail at the following link:
https://voidstar.blog/ibm-5100-character-sets/
For general topics about the IBM 5100, see:
https://voidstar.blog/ibm-5100-personal-computer/
And for details of how this particular IBM 5100 was obtained:
https://voidstar.blog/ibm-5100-5110-sources/
