Difference between revisions of "VAXstation 100 firmware notes"
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==Error LEDs== | ==Error LEDs== | ||
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| + | Indicates which test failed. During powerup, green light turned off. During idle loop, green light is in. | ||
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[[Image:Vs100-diagnostic-led-errors.png]] | [[Image:Vs100-diagnostic-led-errors.png]] | ||
Revision as of 12:02, 10 February 2023
Random notes from running the firmware in an emulator.
Memory map
Error creating thumbnail: Unable to save thumbnail to destination
Error LEDs
Indicates which test failed. During powerup, green light turned off. During idle loop, green light is in.
Error creating thumbnail: Unable to save thumbnail to destination
D0 flags
The firmware maintains a set of flags in register D0.
| Bit (decimal) | Meaning |
| 16 | Maintenance mode. |
| 19 | Powerup error. |
| 24 | BBA done. |
| 25 | Vertical retrace interrupt. |
