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+++ b/doc/csr.txt
@@ -30,6 +30,8 @@ The following standard CSRs are available:
* 0xf13: mimpid ("RVCo")
* 0xf14: mhartid (0)
+=========================================
+
The following custom CSRs are also available:
0x800 - Clock Configuration
@@ -56,6 +58,12 @@ the Address field selects the base address of the 256-byte MMIO region.
When set to 0x00000000, MMIO is disabled.
See mmio.txt for MMIO region contents.
+0xbf1 - h3.misa
+
+Stores enhanced ISA identification information, see the Hazard3 reference manual for more information: https://wren.wtf/hazard3/doc/#reg-h3.misa
+
+=========================================
+
Additionally, the mip and mie CSRs have some interrupts that are not yet implemented,
while some of the platform-use bits have been assigned to additional interrupts.