diff options
Diffstat (limited to 'opcodes.asm')
| -rw-r--r-- | opcodes.asm | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/opcodes.asm b/opcodes.asm index fdff23c..f887f81 100644 --- a/opcodes.asm +++ b/opcodes.asm @@ -470,12 +470,10 @@ emu_op_20: ;; JR NZ,immed.b ;; if ~Z, ;; PC <- PC+immed.b - ;; SPEED can be made faster ;; No flags - beq.s end_20 - FETCHBI d1 - add.w d1,epc ; XXX deref? -end_20: + bsr f_norm_z + bne emu_op_18 ; branch taken: zero clear + add.l #1,epc DONE ;nok START @@ -548,6 +546,7 @@ emu_op_28: ;; No flags bsr f_norm_z bne emu_op_18 + add.l #1,epc DONE ;nok START @@ -606,6 +605,7 @@ emu_op_30: ;; PC <- PC+immed.b bsr f_norm_c beq emu_op_18 ; branch taken: carry clear + add.l #1,epc DONE ;nok START @@ -680,6 +680,7 @@ emu_op_38: ;; PC <- PC+immed.b bsr f_norm_c bne emu_op_18 + add.l #1,epc DONE ;nok START @@ -1797,6 +1798,7 @@ emu_op_c2: ;; PC <- immed.w bsr f_norm_z bne.s emu_op_c3 + add.l #2,epc DONE ;nok START @@ -1814,6 +1816,7 @@ emu_op_c4: ;; If ~Z, CALL immed.w bsr f_norm_z bne emu_op_cd + add.l #2,epc DONE ;nok START @@ -1866,6 +1869,7 @@ emu_op_ca: ;; If Z, jump bsr f_norm_z beq emu_op_c3 + add.l #2,epc DONE ;nok START @@ -1878,6 +1882,7 @@ emu_op_cc: ;; CALL Z,immed.w bsr f_norm_z beq.s emu_op_cd + add.l #2,epc DONE ;nok START @@ -1931,6 +1936,7 @@ emu_op_d2: ;; JP NC,immed.w bsr f_norm_c beq emu_op_c3 + add.l #2,epc DONE START @@ -1946,6 +1952,7 @@ emu_op_d4: ;; CALL NC,immed.w bsr f_norm_c beq emu_op_cd + add.l #2,epc DONE ;nok START @@ -2008,6 +2015,7 @@ emu_op_dc: ;; CALL C,immed.w bsr f_norm_c bne emu_op_cd + add.l #2,epc DONE ;nok START @@ -2052,6 +2060,7 @@ emu_op_e2: ;; JP PO,immed.w bsr f_norm_pv beq emu_op_c3 + add.l #2,epc DONE ;nok START @@ -2069,6 +2078,7 @@ emu_op_e4: ;; if parity odd (P=0), call bsr f_norm_pv beq emu_op_cd + add.l #2,epc DONE ;nok START @@ -2117,6 +2127,7 @@ emu_op_ea: ;; JP PE,immed.w bsr f_norm_pv bne emu_op_c3 + add.l #2,epc DONE ;nok START @@ -2131,6 +2142,7 @@ emu_op_ec: ;; If parity even (P=1), call bsr f_norm_c bne emu_op_cd + add.l #2,epc DONE ;nok START @@ -2180,6 +2192,7 @@ emu_op_f2: ;; JP P,immed.w bsr f_norm_sign beq emu_op_c3 ; JP + add.l #2,epc DONE ;nok START @@ -2247,6 +2260,7 @@ emu_op_fa: ;; JP M,immed.w bsr f_norm_sign bne emu_op_c3 ; JP + add.l #2,epc DONE ;nok START @@ -2261,6 +2275,7 @@ emu_op_fc: ;; Call if minus (S=1) bsr f_norm_sign bne emu_op_cd + add.l #2,epc DONE ;nok START |