Update isa.org add D register

2024-02-24 21:43:08 +01:00 · 2024-02-24 21:43:08 +01:00 · 87a44f2d3a
parent 7277a769fb
commit 87a44f2d3a
1 changed files with 5 additions and 4 deletions
--- a/doc/isa.org
+++ b/doc/isa.org
@ -4,10 +4,11 @@
 ** Registers

 - PC :: Program counter (32bit)
- AC :: Accumulator (32bit)
- X  :: X register (32bit)
- Y  :: Y register (32bit)
- SR :: status register (32bit)
+- A  :: Accumulator (32bit)
+- D  :: Direct register (32bit)
+- X  :: X index register (32bit)
+- Y  :: Y index register (32bit)
+- SR :: status register (8bit)
 - SP :: stack pointer (32bit)

 Status register flags