Merge pull request #3 from orbit-systems/main

Author: spsandwichman

arch/quickref.md

@@ -3,17 +3,17 @@
 Registers - 64 bits wide
 
     rz      always reads zero, writes are ignored
-    ra      general purpose
-    rb      general purpose
-    rc      general purpose
-    rd      general purpose
+    ra      general purpose (function parameters)
+    rb      general purpose (function parameters)
+    rc      general purpose (function parameters)
+    rd      general purpose (function parameters)
     re      general purpose
     rf      general purpose
     rg      general purpose
     rh      general purpose
-    ri      general purpose
-    rj      general purpose
-    rk      general purpose
+    ri      general purpose (callee saved)
+    rj      general purpose (callee saved)
+    rk      general purpose (callee saved)
     pc      program counter - points to current instruction in memory
     sp      stack pointer - stack grows down
     fp      frame pointer

handbook/branch.txt

@@ -1,17 +1,17 @@
-instruction     func		description
+instruction     func        description
 
 bra             0 0000      true
-beq             1 0001 		equal
-bez             2 0010 		zero
-blt             3 0011 		less than
-ble             4 0100 		less than or equal to
-bltu            5 0101 		less than (unsigned)
-bleu            6 0110 		less than or equal to (unsigned)
-bpe             7 0111 		parity bit enabled (odd)
-bne             9 1001 		not equal
-bnz             A 1010 		not zero
-bge             B 1011 		greater than or equal to
-bgt             C 1100 		greater than
-bgeu            D 1101 		greater than or equal to (unsigned)
-bgtu            E 1110 		greater than (unsigned)
-bpd             F 1111 		parity bit disabled (even)
+beq             1 0001      equal
+bez             2 0010      zero
+blt             3 0011      less than
+ble             4 0100      less than or equal to
+bltu            5 0101      less than (unsigned)
+bleu            6 0110      less than or equal to (unsigned)
+bpe             7 0111      parity bit enabled (odd)
+bne             9 1001      not equal
+bnz             A 1010      not zero
+bge             B 1011      greater than or equal to
+bgt             C 1100      greater than
+bgeu            D 1101      greater than or equal to (unsigned)
+bgtu            E 1110      greater than (unsigned)
+bpd             F 1111      parity bit disabled (even)

handbook/registers.txt

@@ -9,4 +9,5 @@ D       sp      stack pointer
 E       fp      frame pointer
 F       st      status register, contains bit flags and information about the processor state
 
-note - fp and st are initialized to 0 and that the stack expands downward. in order to use the stack, you must relocate the stack somewhere specific.
+note - fp and st are initialized to 0 and that the stack expands downward. 
+in order to use the stack, you must relocate the stack somewhere specific.