diff options
| -rw-r--r-- | alu.asm | 4 | ||||
| -rw-r--r-- | main.asm | 15 |
2 files changed, 15 insertions, 4 deletions
@@ -0,0 +1,4 @@ + ;; Parting out the big math/logic routines from the + ;; instruction dispatch table. + + @@ -219,6 +219,13 @@ emu_setup: rts +;; |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| +;; _ __ ___ ___ _ __ ___ ___ _ __ _ _ ||||||||||||||||||||||||||| +;; | '_ ` _ \ / _ \ '_ ` _ \ / _ \| '__| | | | \\\\\\\\\\\\\\\\\\\\\\\\\\\ +;; | | | | | | __/ | | | | | (_) | | | |_| | ||||||||||||||||||||||||||| +;; |_| |_| |_|\___|_| |_| |_|\___/|_| \__, | /////////////////////////// +;; of the virtual type |___/ ||||||||||||||||||||||||||| +;; =============================================JJJJJJJJJJJJJJJJJJJJJJJJJJJ ;; Take a virtual address in d1 and dereference it. Returns the ;; host address in a0. Destroys a0, d0. @@ -240,24 +247,24 @@ ref_3: dc.l 0 ; bank 3 ;; Take a physical address in a0 and turn it into a virtual ;; address in d0 - ;; Destroys + ;; Destroys d0 underef: move.l a0,d0 sub.l ref_0(pc,d0),d0 bmi underef_not0 - cmpi.l #$10000,d0 + cmpi.l #$4000,d0 bmi underef_thatsit underef_not0: move.l a0,d0 sub.l ref_1(pc,d0),d0 bmi underef_not1 - cmpi.l #$10000,d0 + cmpi.l #$4000,d0 bmi underef_thatsit underef_not1: move.l a0,d0 sub.l ref_2(pc,d0),d0 bmi underef_not2 - cmpi.l #$10000,d0 + cmpi.l #$4000,d0 bmi underef_thatsit underef_not2: move.l a0,d0 |