VAXstation 100 firmware notes: Difference between revisions
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→Error LEDs: Field service tech tip 7. |
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==Error LEDs== | ==Error LEDs== | ||
Indicates which test failed. During | Indicates which test failed. During power-up, green light turned off. During idle loop, green light remains on. | ||
[[Image:Vs100-diagnostic-led-errors.png]] | [[Image:Vs100-diagnostic-led-errors.png]] | ||
Apparently there's a bug. | |||
[[Image:VS100-TT-7.png]] | |||
==D0 flags== | ==D0 flags== | ||
Revision as of 12:07, 10 February 2023
Random notes from running the firmware in an emulator.
Memory map
Error LEDs
Indicates which test failed. During power-up, green light turned off. During idle loop, green light remains on.
Apparently there's a bug.
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. |
