View source for VAXstation 100 firmware notes

Random notes from running the firmware in an emulator.

==Memory map==
[[Image:Vs100-memory-map.png]]

==Error LEDs==
[[Image:Vs100-diagnostic-led-errors.png]]

==D0 flags==

The firmware maintains a set of flags in register D0.

{| class="wikitable
|-
| Bit (decimal)
| Meaning
|-
| 16
| Maintenance mode.
|-
| 19
| Powerup error.
|-
| 24
| BBA done.
|-
| 25
| Vertical retrace interrupt.
|}