Difference between revisions of "VAXstation 100 firmware notes"
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[[Image:VS100-TT-7.png]] | [[Image:VS100-TT-7.png]] | ||
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| + | ==Interrupts== | ||
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| + | All VS100 interrupts use the autovector feature. | ||
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| + | [[Image:VS100-interrupts.png]] | ||
==D0 flags== | ==D0 flags== | ||
Revision as of 15:57, 10 February 2023
Random notes from running the firmware in an emulator.
Contents
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.
Interrupts
All VS100 interrupts use the autovector feature.
D0 flags
The firmware maintains a set of flags in register D0.
| Bit (decimal) | Meaning |
| 16 | Manufacturing mode. |
| 19 | Power-up error. |
| 24 | BBA done. |
| 25 | Vertical retrace interrupt. |
