docs: Describe "bring up area" and ROM details

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/README.md b/README.md
index 420f4a5..4814622 100644
--- a/README.md
+++ b/README.md
@@ -209,6 +209,13 @@ A value of 0b1 indicates an immediate value is used for the second
 operand (``IMM_OP``) and a value of 0b0 indicates a register is used for
 the second operand (``REG_OP``).
 
+### Bring up area
+
+Upon power up, all general purpose registers (excluding x0), as well as the stack pointer
+and frame pointer registers are to all go high (all 1s), PC is to be set to an initial value
+of 0xFFF00000 referencing whats known as the "bring up area" containing platform firmware and
+initialization code located in the ROM.
+
 ### Opcode list
 
 - `NOP`: `0x00`