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authorAstrid Smith2010-06-14 20:26:49 -0700
committerAstrid Smith2010-06-14 20:26:49 -0700
commitddd3b3267a0c434561840080eb73493572aaffa0 (patch)
tree9d3b31c7b6f7571dd5a67d94c926690b8f6be0dd
parent110b54c9beb0d1bcdd52d8a2247da035bab28b01 (diff)
Done with my first pass through the 1-byte opcodes.
-rw-r--r--flags.asm12
-rw-r--r--interrupts.asm4
-rw-r--r--main.asm193
-rw-r--r--ports.asm1035
4 files changed, 1220 insertions, 24 deletions
diff --git a/flags.asm b/flags.asm
index aa04118..928a6e7 100644
--- a/flags.asm
+++ b/flags.asm
@@ -84,6 +84,18 @@ FNPV_ok:
andi.b #%00000100,d1
rts
+ ;; Normalize and return Sign bit (loaded into Z bit).
+ ;; Destroys d1
+f_norm_sign:
+ move.b flag_valid-flag_storage(a3),d1
+ andi.b #%01000000,d1
+ bne.s FNsign_ok ; Bit is already valid
+ bsr flags_normalize
+FNsign_ok:
+ move.b flag_byte-flag_storage(a3),d1
+ andi.b #%01000000,d1
+ rts
+
;; Routine to turn 68k flags into z80 flags.
;; Preconditions:
;; Flags to change are noted in d0 by a 1 bit
diff --git a/interrupts.asm b/interrupts.asm
new file mode 100644
index 0000000..f76a0ff
--- /dev/null
+++ b/interrupts.asm
@@ -0,0 +1,4 @@
+ints_stop:
+ rts
+ints_start:
+ rts
diff --git a/main.asm b/main.asm
index 7a5d870..df9dc2c 100644
--- a/main.asm
+++ b/main.asm
@@ -46,15 +46,17 @@
;; Macro to read a byte from main memory at register \1. Puts
;; the byte read in \2.
-FETCHB MACRO ; 14 cycles, 4 bytes
- ;; XXX deref
- move.b 0(a6,\1.w),\2
+FETCHB MACRO
+ move.w \1,d1
+ bsr deref
+ move.b (a0),\2
ENDM
;; Macro to write a byte in \1 to main memory at \2 (regs only)
-PUTB MACRO ; 14 cycles, 4 bytes
- ;; XXX deref
- move.b \1,0(a6,\2)
+PUTB MACRO
+ move.w \2,d1
+ bsr deref
+ move.b \1,(a0)
ENDM
;; Macro to read a word from main memory at register \1
@@ -79,6 +81,7 @@ PUTW MACRO ; 14 cycles, 4 bytes
ENDM
;; Push the word in \1 (register) using stack register a4.
+ ;; Sadly, I can't trust the stack register to be aligned.
;; Destroys d0.
;; (SP-2) <- \1_l
@@ -166,13 +169,6 @@ DONE MACRO
;; == Special Opcode Macros ========================================
- ;; Do an ADD \1,\2
-F_ADD_W MACRO
- ENDM
- ;; Do an SUB \1,\2
-F_SUB_W MACRO
- ENDM
-
;; INC and DEC macros
F_INC_B MACRO
ENDM
@@ -206,6 +202,7 @@ _main:
include "flags.asm"
include "ports.asm"
+ include "interrupts.asm"
emu_setup:
movea emu_plain_op,a5
@@ -1868,7 +1865,8 @@ emu_op_c3: ; S12 T36
emu_op_c4:
;; CALL NZ,immed.w
;; If ~Z, CALL immed.w
- ;; XXX do this
+ bsr f_norm_z
+ bne emu_op_cd
DONE
START
@@ -1886,8 +1884,8 @@ emu_op_c6:
START
emu_op_c7:
- ;; RST immed.b
- ;; CALL 0
+ ;; RST &0
+ ;; == CALL 0
;; XXX check
;; XXX FIX D2
move.l d2,d1
@@ -1930,7 +1928,8 @@ emu_op_cb: ; prefix
START
emu_op_cc:
;; CALL Z,immed.w
- ;; XXX do this
+ bsr f_norm_z
+ beq emu_op_cd
DONE
START
@@ -1993,7 +1992,8 @@ emu_op_d3:
START
emu_op_d4:
;; CALL NC,immed.w
- ;; XXX do this
+ bsr f_norm_c
+ beq emu_op_cd
DONE
START
@@ -2049,7 +2049,8 @@ emu_op_db:
START
emu_op_dc:
;; CALL C,immed.w
- ;; XXX do this
+ bsr f_norm_c
+ bne emu_op_cd
DONE
START
@@ -2086,24 +2087,71 @@ emu_op_e1:
START
emu_op_e2:
- ;; EX (SP),HL
- ;; Exchange
+ ;; JP PO,immed.w
+ bsr f_norm_pv
+ beq emu_op_c3
+ DONE
+
START
emu_op_e3:
+ ;; EX (SP),HL
+ ;; Exchange
+ POPW d1
+ PUSHW d6
+ move.w d1,d6
+ DONE
+
START
emu_op_e4:
+ ;; CALL PO,immed.w
+ ;; if parity odd (P=0), call
+ bsr f_norm_pv
+ beq emu_op_cd
+ DONE
+
START
emu_op_e5:
+ ;; PUSH HL
+ PUSHW d6
+ DONE
+
START
emu_op_e6:
+ ;; AND immed.b
+ FETCHBI d1
+ F_AND_B d1,d3
+ DONE
+
START
emu_op_e7:
+ ;; RST &20
+ ;; == CALL 20
+ ;; XXX do this
+ DONE
+
START
emu_op_e8:
+ ;; RET PE
+ ;; If parity odd (P zero), return
+ bsr f_norm_pv
+ bne emu_op_c9
+ DONE
+
START
emu_op_e9:
+ ;; JP (HL)
+ FETCHB d6,d1
+ bsr deref
+ movea a0,a6
+ DONE
+
START
emu_op_ea:
+ ;; JP PE,immed.w
+ bsr f_norm_pv
+ bne emu_op_c3
+ DONE
+
START
emu_op_eb:
;; EX DE,HL
@@ -2112,51 +2160,148 @@ emu_op_eb:
START
emu_op_ec:
+ ;; CALL PE,immed.w
+ ;; If parity even (P=1), call
+ bsr f_norm_c
+ bne emu_op_cd
+ DONE
+
START
emu_op_ed: ; prefix
-
movea.w emu_op_undo_ed(pc),a2
+ DONE
+
START
emu_op_ee:
+ ;; XOR immed.b
+ FETCHBI d1
+ F_XOR_B d1,d3
+ DONE
+
START
emu_op_ef:
+ ;; RST &28
+ ;; == CALL 28
+ ;; XXX DO THIS
+ DONE
+
START
emu_op_f0:
+ ;; RET P
+ ;; Return if Positive
+ bsr f_norm_sign
+ beq emu_op_c9 ; RET
+ DONE
+
START
emu_op_f1:
+ ;; POP AF
+ ;; SPEED this can be made faster ...
+ POPW d3
+ move.w d3,flag_byte-flag_storage(a3)
+ move.b #$ff,flag_valid-flag_storage(a3)
+ DONE
+
START
emu_op_f2:
+ ;; JP P,immed.w
+ bsr f_norm_sign
+ beq emu_op_c3 ; JP
+ DONE
+
START
emu_op_f3:
+ ;; DI
+ bsr ints_stop
+
START
emu_op_f4:
+ ;; CALL P,&0000
+ ;; Call if positive (S=0)
+ bsr f_norm_sign
+ beq emu_op_cd
+ DONE
+
START
emu_op_f5:
+ ;; PUSH AF
+ bsr flags_normalize
+ LOHI d3
+ move.b flag_byte-flag_storage(a3),d3
+ HILO d3
+ PUSHW d3
+ DONE
+
START
emu_op_f6:
+ ;; OR immed.b
+ FETCHBI d1
+ F_OR_B d1,d3
+ DONE
+
START
emu_op_f7:
+ ;; RST &30
+ ;; == CALL 30
+ ;; XXX do this
+ DONE
+
START
emu_op_f8:
+ ;; RET M
+ ;; Return if Sign == 1, minus
+ bsr f_norm_sign
+ bne emu_op_c9 ; RET
+ DONE
+
START
emu_op_f9:
+ ;; LD SP,HL
+ ;; SP <- HL
+ move.w d6,d1
+ bsr deref
+ movea a0,a4
+ DONE
+
START
emu_op_fa:
+ ;; JP M,immed.w
+ bsr f_norm_sign
+ bne emu_op_c3 ; JP
+ DONE
+
START
-emu_op_fb:p
+emu_op_fb:
;; EI
+ bsr ints_start
+ DONE
START
emu_op_fc:
+ ;; CALL M,immed.w
+ ;; Call if minus (S=1)
+ bsr f_norm_sign
+ bne emu_op_cd
+ DONE
+
START
emu_op_fd: ; prefix
;; swap IY, HL
-
movea.w emu_op_undo_fd(pc),a2
+
START
emu_op_fe:
+ ;; CP immed.b
+ FETCHBI d1
+ F_CP_B d1,d3
+ DONE
+
START
emu_op_ff:
+ ;; RST &38
+ ;; == CALL 38
+ ;; XXX do this
+ DONE
emu_op_undo_cb:
diff --git a/ports.asm b/ports.asm
index 4ca60f7..8244c3d 100644
--- a/ports.asm
+++ b/ports.asm
@@ -2,8 +2,1043 @@
;; bit that's unique to TI calculators.
;; Port is in d0, byte is in d1
+ ;; Destroys a0
port_in:
+ movea lut_ports_in(pc,d0),a0
+ jmp (a0)
rts
port_out:
+ ;; Fix this to work properly ...
+; movea lut_ports_in(pc,d0),a0
+ jmp (a0)
rts
+
+lut_ports_in:
+ dc.l port_in_00
+ dc.l port_in_01
+ dc.l port_in_02
+ dc.l port_in_03
+ dc.l port_in_04
+ dc.l port_in_05
+ dc.l port_in_06
+ dc.l port_in_07
+ dc.l port_in_08
+ dc.l port_in_09
+ dc.l port_in_0a
+ dc.l port_in_0b
+ dc.l port_in_0c
+ dc.l port_in_0d
+ dc.l port_in_0e
+ dc.l port_in_0f
+ dc.l port_in_10
+ dc.l port_in_11
+ dc.l port_in_12
+ dc.l port_in_13
+ dc.l port_in_14
+ dc.l port_in_15
+ dc.l port_in_16
+ dc.l port_in_17
+ dc.l port_in_18
+ dc.l port_in_19
+ dc.l port_in_1a
+ dc.l port_in_1b
+ dc.l port_in_1c
+ dc.l port_in_1d
+ dc.l port_in_1e
+ dc.l port_in_1f
+ dc.l port_in_20
+ dc.l port_in_21
+ dc.l port_in_22
+ dc.l port_in_23
+ dc.l port_in_24
+ dc.l port_in_25
+ dc.l port_in_26
+ dc.l port_in_27
+ dc.l port_in_28
+ dc.l port_in_29
+ dc.l port_in_2a
+ dc.l port_in_2b
+ dc.l port_in_2c
+ dc.l port_in_2d
+ dc.l port_in_2e
+ dc.l port_in_2f
+ dc.l port_in_30
+ dc.l port_in_31
+ dc.l port_in_32
+ dc.l port_in_33
+ dc.l port_in_34
+ dc.l port_in_35
+ dc.l port_in_36
+ dc.l port_in_37
+ dc.l port_in_38
+ dc.l port_in_39
+ dc.l port_in_3a
+ dc.l port_in_3b
+ dc.l port_in_3c
+ dc.l port_in_3d
+ dc.l port_in_3e
+ dc.l port_in_3f
+ dc.l port_in_40
+ dc.l port_in_41
+ dc.l port_in_42
+ dc.l port_in_43
+ dc.l port_in_44
+ dc.l port_in_45
+ dc.l port_in_46
+ dc.l port_in_47
+ dc.l port_in_48
+ dc.l port_in_49
+ dc.l port_in_4a
+ dc.l port_in_4b
+ dc.l port_in_4c
+ dc.l port_in_4d
+ dc.l port_in_4e
+ dc.l port_in_4f
+ dc.l port_in_50
+ dc.l port_in_51
+ dc.l port_in_52
+ dc.l port_in_53
+ dc.l port_in_54
+ dc.l port_in_55
+ dc.l port_in_56
+ dc.l port_in_57
+ dc.l port_in_58
+ dc.l port_in_59
+ dc.l port_in_5a
+ dc.l port_in_5b
+ dc.l port_in_5c
+ dc.l port_in_5d
+ dc.l port_in_5e
+ dc.l port_in_5f
+ dc.l port_in_60
+ dc.l port_in_61
+ dc.l port_in_62
+ dc.l port_in_63
+ dc.l port_in_64
+ dc.l port_in_65
+ dc.l port_in_66
+ dc.l port_in_67
+ dc.l port_in_68
+ dc.l port_in_69
+ dc.l port_in_6a
+ dc.l port_in_6b
+ dc.l port_in_6c
+ dc.l port_in_6d
+ dc.l port_in_6e
+ dc.l port_in_6f
+ dc.l port_in_70
+ dc.l port_in_71
+ dc.l port_in_72
+ dc.l port_in_73
+ dc.l port_in_74
+ dc.l port_in_75
+ dc.l port_in_76
+ dc.l port_in_77
+ dc.l port_in_78
+ dc.l port_in_79
+ dc.l port_in_7a
+ dc.l port_in_7b
+ dc.l port_in_7c
+ dc.l port_in_7d
+ dc.l port_in_7e
+ dc.l port_in_7f
+ dc.l port_in_80
+ dc.l port_in_81
+ dc.l port_in_82
+ dc.l port_in_83
+ dc.l port_in_84
+ dc.l port_in_85
+ dc.l port_in_86
+ dc.l port_in_87
+ dc.l port_in_88
+ dc.l port_in_89
+ dc.l port_in_8a
+ dc.l port_in_8b
+ dc.l port_in_8c
+ dc.l port_in_8d
+ dc.l port_in_8e
+ dc.l port_in_8f
+ dc.l port_in_90
+ dc.l port_in_91
+ dc.l port_in_92
+ dc.l port_in_93
+ dc.l port_in_94
+ dc.l port_in_95
+ dc.l port_in_96
+ dc.l port_in_97
+ dc.l port_in_98
+ dc.l port_in_99
+ dc.l port_in_9a
+ dc.l port_in_9b
+ dc.l port_in_9c
+ dc.l port_in_9d
+ dc.l port_in_9e
+ dc.l port_in_9f
+ dc.l port_in_a0
+ dc.l port_in_a1
+ dc.l port_in_a2
+ dc.l port_in_a3
+ dc.l port_in_a4
+ dc.l port_in_a5
+ dc.l port_in_a6
+ dc.l port_in_a7
+ dc.l port_in_a8
+ dc.l port_in_a9
+ dc.l port_in_aa
+ dc.l port_in_ab
+ dc.l port_in_ac
+ dc.l port_in_ad
+ dc.l port_in_ae
+ dc.l port_in_af
+ dc.l port_in_b0
+ dc.l port_in_b1
+ dc.l port_in_b2
+ dc.l port_in_b3
+ dc.l port_in_b4
+ dc.l port_in_b5
+ dc.l port_in_b6
+ dc.l port_in_b7
+ dc.l port_in_b8
+ dc.l port_in_b9
+ dc.l port_in_ba
+ dc.l port_in_bb
+ dc.l port_in_bc
+ dc.l port_in_bd
+ dc.l port_in_be
+ dc.l port_in_bf
+ dc.l port_in_c0
+ dc.l port_in_c1
+ dc.l port_in_c2
+ dc.l port_in_c3
+ dc.l port_in_c4
+ dc.l port_in_c5
+ dc.l port_in_c6
+ dc.l port_in_c7
+ dc.l port_in_c8
+ dc.l port_in_c9
+ dc.l port_in_ca
+ dc.l port_in_cb
+ dc.l port_in_cc
+ dc.l port_in_cd
+ dc.l port_in_ce
+ dc.l port_in_cf
+ dc.l port_in_d0
+ dc.l port_in_d1
+ dc.l port_in_d2
+ dc.l port_in_d3
+ dc.l port_in_d4
+ dc.l port_in_d5
+ dc.l port_in_d6
+ dc.l port_in_d7
+ dc.l port_in_d8
+ dc.l port_in_d9
+ dc.l port_in_da
+ dc.l port_in_db
+ dc.l port_in_dc
+ dc.l port_in_dd
+ dc.l port_in_de
+ dc.l port_in_df
+ dc.l port_in_e0
+ dc.l port_in_e1
+ dc.l port_in_e2
+ dc.l port_in_e3
+ dc.l port_in_e4
+ dc.l port_in_e5
+ dc.l port_in_e6
+ dc.l port_in_e7
+ dc.l port_in_e8
+ dc.l port_in_e9
+ dc.l port_in_ea
+ dc.l port_in_eb
+ dc.l port_in_ec
+ dc.l port_in_ed
+ dc.l port_in_ee
+ dc.l port_in_ef
+ dc.l port_in_f0
+ dc.l port_in_f1
+ dc.l port_in_f2
+ dc.l port_in_f3
+ dc.l port_in_f4
+ dc.l port_in_f5
+ dc.l port_in_f6
+ dc.l port_in_f7
+ dc.l port_in_f8
+ dc.l port_in_f9
+ dc.l port_in_fa
+ dc.l port_in_fb
+ dc.l port_in_fc
+ dc.l port_in_fd
+ dc.l port_in_fe
+ dc.l port_in_ff
+
+lut_ports_out:
+ dc.l port_out_00
+ dc.l port_out_01
+ dc.l port_out_02
+ dc.l port_out_03
+ dc.l port_out_04
+ dc.l port_out_05
+ dc.l port_out_06
+ dc.l port_out_07
+ dc.l port_out_08
+ dc.l port_out_09
+ dc.l port_out_0a
+ dc.l port_out_0b
+ dc.l port_out_0c
+ dc.l port_out_0d
+ dc.l port_out_0e
+ dc.l port_out_0f
+ dc.l port_out_10
+ dc.l port_out_11
+ dc.l port_out_12
+ dc.l port_out_13
+ dc.l port_out_14
+ dc.l port_out_15
+ dc.l port_out_16
+ dc.l port_out_17
+ dc.l port_out_18
+ dc.l port_out_19
+ dc.l port_out_1a
+ dc.l port_out_1b
+ dc.l port_out_1c
+ dc.l port_out_1d
+ dc.l port_out_1e
+ dc.l port_out_1f
+ dc.l port_out_20
+ dc.l port_out_21
+ dc.l port_out_22
+ dc.l port_out_23
+ dc.l port_out_24
+ dc.l port_out_25
+ dc.l port_out_26
+ dc.l port_out_27
+ dc.l port_out_28
+ dc.l port_out_29
+ dc.l port_out_2a
+ dc.l port_out_2b
+ dc.l port_out_2c
+ dc.l port_out_2d
+ dc.l port_out_2e
+ dc.l port_out_2f
+ dc.l port_out_30
+ dc.l port_out_31
+ dc.l port_out_32
+ dc.l port_out_33
+ dc.l port_out_34
+ dc.l port_out_35
+ dc.l port_out_36
+ dc.l port_out_37
+ dc.l port_out_38
+ dc.l port_out_39
+ dc.l port_out_3a
+ dc.l port_out_3b
+ dc.l port_out_3c
+ dc.l port_out_3d
+ dc.l port_out_3e
+ dc.l port_out_3f
+ dc.l port_out_40
+ dc.l port_out_41
+ dc.l port_out_42
+ dc.l port_out_43
+ dc.l port_out_44
+ dc.l port_out_45
+ dc.l port_out_46
+ dc.l port_out_47
+ dc.l port_out_48
+ dc.l port_out_49
+ dc.l port_out_4a
+ dc.l port_out_4b
+ dc.l port_out_4c
+ dc.l port_out_4d
+ dc.l port_out_4e
+ dc.l port_out_4f
+ dc.l port_out_50
+ dc.l port_out_51
+ dc.l port_out_52
+ dc.l port_out_53
+ dc.l port_out_54
+ dc.l port_out_55
+ dc.l port_out_56
+ dc.l port_out_57
+ dc.l port_out_58
+ dc.l port_out_59
+ dc.l port_out_5a
+ dc.l port_out_5b
+ dc.l port_out_5c
+ dc.l port_out_5d
+ dc.l port_out_5e
+ dc.l port_out_5f
+ dc.l port_out_60
+ dc.l port_out_61
+ dc.l port_out_62
+ dc.l port_out_63
+ dc.l port_out_64
+ dc.l port_out_65
+ dc.l port_out_66
+ dc.l port_out_67
+ dc.l port_out_68
+ dc.l port_out_69
+ dc.l port_out_6a
+ dc.l port_out_6b
+ dc.l port_out_6c
+ dc.l port_out_6d
+ dc.l port_out_6e
+ dc.l port_out_6f
+ dc.l port_out_70
+ dc.l port_out_71
+ dc.l port_out_72
+ dc.l port_out_73
+ dc.l port_out_74
+ dc.l port_out_75
+ dc.l port_out_76
+ dc.l port_out_77
+ dc.l port_out_78
+ dc.l port_out_79
+ dc.l port_out_7a
+ dc.l port_out_7b
+ dc.l port_out_7c
+ dc.l port_out_7d
+ dc.l port_out_7e
+ dc.l port_out_7f
+ dc.l port_out_80
+ dc.l port_out_81
+ dc.l port_out_82
+ dc.l port_out_83
+ dc.l port_out_84
+ dc.l port_out_85
+ dc.l port_out_86
+ dc.l port_out_87
+ dc.l port_out_88
+ dc.l port_out_89
+ dc.l port_out_8a
+ dc.l port_out_8b
+ dc.l port_out_8c
+ dc.l port_out_8d
+ dc.l port_out_8e
+ dc.l port_out_8f
+ dc.l port_out_90
+ dc.l port_out_91
+ dc.l port_out_92
+ dc.l port_out_93
+ dc.l port_out_94
+ dc.l port_out_95
+ dc.l port_out_96
+ dc.l port_out_97
+ dc.l port_out_98
+ dc.l port_out_99
+ dc.l port_out_9a
+ dc.l port_out_9b
+ dc.l port_out_9c
+ dc.l port_out_9d
+ dc.l port_out_9e
+ dc.l port_out_9f
+ dc.l port_out_a0
+ dc.l port_out_a1
+ dc.l port_out_a2
+ dc.l port_out_a3
+ dc.l port_out_a4
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