Why aren programming docs for Sun frame buffers at least available on a NDA basis?
And the answer is: Programming docs for Sun frame buffers don’t exist, full stop. The level of support and documentation needed to do this across the product line would be significant. There are several very subtle rules and restrictions for each device – all have individual differences beyond the register definitions. Many of these restrictions are not well documented except in the driver code. Some of them may hang the system if violated.