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Better document real3d registers

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This commit is contained in:
Ian Curtis 2021-12-17 23:57:12 +00:00
parent 6ff099b5ba
commit 6f7130c50b
1 changed files with 33 additions and 0 deletions
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33
Src/Model3/Real3D.cpp
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@ -754,6 +754,39 @@ void CReal3D::WriteJTAGRegister(uint64_t instruction, uint64_t data)
}
// Registers correspond to the Stat_Pckt in the Real3d sdk
/*
Stat Packet
0x00: xxxx---- -------- -------- -------- spare1
----x--- -------- -------- -------- gp_done
-----x-- -------- -------- -------- dp_done
------x- -------- -------- -------- ping_pong
-------x -------- -------- -------- update_done
-------- x------- -------- -------- rend_done
-------- -xxxxxxx xxxxxxxx xxxxxxxx tot_clks 23bit val (0x7FFFFF). This is a 33.33mhz clock value.
Think this is the time the GPU takes to process the frame, used by software to
estimate the frame rate.
0x01: -------- -------- -------- -------- spare2
-------- -xxxxxxx xxxxxxxx xxxxxxxx vpt0_clks - not sure what this is used for (if anything). It's not used by the SDK
0x02: -------- -------- -------- -------- spare3
-------- -xxxxxxx xxxxxxxx xxxxxxxx vpt1_clks - not sure what this is used for (if anything). It's not used by the SDK
0x03: -------- -------- -------- -------- spare4
-------- -xxxxxxx xxxxxxxx xxxxxxxx vpt2_clks - not sure what this is used for (if anything). It's not used by the SDK
0x04: -------- -------- -------- -------- spare5
-------- -xxxxxxx xxxxxxxx xxxxxxxx vpt3_clks - not sure what this is used for (if anything). It's not used by the SDK
0x05: range0 (float) Line of sight value for priority level 0
0x06: range1 (float) Line of sight value for priority level 1
0x07: range2 (float) Line of sight value for priority level 2
0x08: range3 (float) Line of sight value for priority level 3
0x09: ls_cycle (uint32) Think this is the frame number, don't think it's used by model3, since games never read this far into memory
*/
uint32_t CReal3D::ReadRegister(unsigned reg)
{
DebugLog("Real3D: Read reg %X\n", reg);