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Changeset 4f508e6 in buchla-68k for ram/seexec.s
- Timestamp:
- 07/01/2017 02:34:46 PM (7 years ago)
- Branches:
- master
- Children:
- 08e1da1
- Parents:
- f40a309
- File:
-
- 1 edited
-
ram/seexec.s (modified) (3 diffs)
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- Unmodified
- Added
- Removed
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ram/seexec.s
rf40a309 r4f508e6 1 *------------------------------------------------------------------------------2 *seexec.s -- score event execution driver3 *Version 40 -- 1988-10-06 -- D.N. Lynx Crowe4 * 5 * struct s_entry * 6 *se_exec(ep, sd)7 * struct s_entry *ep;8 *short sd;9 * 10 *Executes the event at 'ep', scrolling in direction 'sd'.11 * 12 *------------------------------------------------------------------------------1 | ------------------------------------------------------------------------------ 2 | seexec.s -- score event execution driver 3 | Version 40 -- 1988-10-06 -- D.N. Lynx Crowe 4 5 | struct s_entry | 6 | se_exec(ep, sd) 7 | struct s_entry |ep; 8 | short sd; 9 10 | Executes the event at 'ep', scrolling in direction 'sd'. 11 12 | ------------------------------------------------------------------------------ 13 13 .text 14 * 14 15 15 .xdef _se_exec 16 * 16 17 17 .xdef BadEvnt 18 * 18 19 19 .xdef _xevent 20 * 20 21 21 .xref _asgvce 22 22 .xref _clkset … … 31 31 .xref _settune 32 32 .xref _setv2gi 33 * 33 34 34 .xref _anrs 35 35 .xref _var2src … … 48 48 .xref _vce2trg 49 49 .xref _veltab 50 * 51 .page 52 * 53 *parameter offsets54 *-----------------55 P_EP .equ 8 *WORD - 'ep' parameter offset56 P_SD .equ 12 *WORD - 'sd' parameter offset57 * 58 *event structure offsets -- MUST match score.h definitions59 *----------------------- ------------------------------60 *offset length61 *------ ------62 E_TIME .equ 0 *LONG63 E_SIZE .equ 4 *BYTE64 E_TYPE .equ 5 *BYTE65 E_DATA1 .equ 6 *BYTE66 E_NOTE .equ 6 *BYTE67 E_DATA2 .equ 7 *BYTE68 E_GROUP .equ 7 *BYTE69 E_BAK .equ 8 *LONG70 E_FWD .equ 12 *LONG71 E_DN .equ 16 *LONG72 E_VEL .equ 16 *WORD73 E_DATA4 .equ 18 *WORD74 E_UP .equ 20 *LONG75 E_LFT .equ 24 *LONG76 E_RGT .equ 28 *LONG77 * 78 *Miscellaneous constants79 *-----------------------80 N_ETYPES .equ 25 *number of event types81 * 82 M_KSTATE .equ $01 *keys status bit83 N_KSTATE .equ $FE *keys status bit complement84 * 85 D_BAK .equ 1 *code for backward scrolling86 * 87 LCL_PRT .equ 2 *0-origin local port number88 LCL_PCH .equ $1080 *port and channel for trigger89 * 90 .page 91 * 92 *A few words about se_exec:93 * 94 *se_exec has to be very fast, so it's written in assembly language,95 *rather than C, which is usually pretty good, but not quite good enough96 *for this application. The faster this routine runs, the higher the97 *tempo we can keep up with. If this code is fast enough, we end up98 *hardware limited by the timer.99 * 100 _se_exec: link a6,#0 *link stack frames101 movea.l P_EP(a6),a0 *get event pointer 'ep' into a0102 move.l a0,_xevent *save in xevent103 move.b E_TYPE(a0),d1 *get event type into d1.W104 andi.w # $007F,d1 *... and mask off new-data flag105 cmp.b #N_ETYPES,d1 *see if it's valid106 blt sexc1 *jump if it is107 * 108 BadEvnt: move.l a0,d0 *setup to return pointer we got109 bra done *exit110 * 111 exexit: movea.l _xevent,a0 *point at next event112 move.l E_FWD(a0),d0 *...113 * 114 done: unlk a6 *done -- unlink stack frames115 rts *return to caller116 * 117 sexc1: lea sextab,a1 *get base of dispatch table118 lsl.w #2,d1 *multiplty event by 4 for index119 movea.l 0(a1,d1.W),a2 *get address of event routine120 jmp (a2) *jump to event execution routine121 * 122 *On entry, the individual execution routines only depend on a0 pointing at the123 *event they were dispatched for.124 * 125 *The usual C function register usage conventions apply:126 * 127 *d0..d2 and a0..a2 are used for scratch, and are not preserved.128 * 129 *d3..d6 and a3..a5 are register variables, and are preserved.130 *a6 = frame pointer, a7 = stack pointer, and are preserved.131 * 132 .page 133 * 134 *exnbeg -- execute note begin135 *------ ------------------136 *If things need to be sped up, we could incorporate the functions of137 *asgvce() here, rather than calling it. asgvce() could also be re-written in138 *assembly language to make it a shade faster.139 * 140 exnbeg: cmpi.w #D_BAK,P_SD(a6) *check direction141 beq nendex *if backward, treat as note end142 * 143 nbegex: clr.w d1 *clear d1144 move.b E_GROUP(a0),d1 *get group number145 add.w d1,d1 * ... *2146 lea _grpstat,a1 *point at grpstat147 tst.w 0(a1,d1.W) *see if group is enabled148 beq exexit *done if not149 * 150 move.b E_NOTE(a0),d1 *d1 = note number nn (0..127)151 move.w #LCL_PCH,d2 *put port and channel in d2152 add.w d1,d2 * d2 = trg153 lea _trgtab,a1 *point at trgtab[trg]154 move.b 0(a1,d2.W),d0 *...155 or.b #M_KSTATE,d0 *set trigger table entry on156 move.b d0,0(a1,d2.W) *...157 lea _veltab,a1 *point at veltab158 add.w d2,d2 *...159 move.w E_VEL(a0),0(a1,d2.W) *put velocity in veltab160 move.w E_VEL(a0),-(a7) *put velocity on the stack161 move.w d1,-(a7) *put note number on the stack162 move.w #1,-(a7) *put channel on the stack163 move.w #LCL_PRT,-(a7) *put port on the stack164 move.b E_GROUP(a0),d1 *d1 = group number (0..11)165 move.w d1,-(a7) *put group number on the stack166 jsr _asgvce *start the note167 add.l #10,a7 * clean up the stack168 bra exexit *done169 * 170 .page 171 * 172 *exnend -- execute note end173 *------ ----------------174 *If things need to be sped up, we could incorporate the functions of175 *procpfl() here, rather than calling it. procpfl() could also be re-written in176 *assembly language to make it a shade faster.177 * 178 exnend: cmpi.w #D_BAK,P_SD(a6) *check direction179 beq nbegex *if backward, treat as beginning180 * 181 nendex: clr.w d1 *clear d1182 move.b E_GROUP(a0),d1 *get group number183 add.w d1,d1 * ... *2184 lea _grpstat,a1 *point at grpstat185 tst.w 0(a1,d1.W) *check group status186 beq exexit *done if disabled187 * 188 move.b E_NOTE(a0),d1 *d1 = note number nn (0..127)189 move.w #LCL_PCH,d2 *put port and channel in d2190 add.w d1,d2 * d2 = trg *2191 add.w d2,d2 *...192 lea _trgtab,a1 *set trigger table entry off193 move.b 0(a1,d2.W),d0 *...194 and.b #N_KSTATE,d0 *...195 move.b d0,0(a1,d2.W) *...196 bne exexit *done if note still active197 * 198 .page 199 * 200 lsr.w #1,d2 *adjust d2201 clr.w d1 *set loop index202 lea _vce2trg,a2 *point at vce2trg table203 * 204 exnend1: cmp.w (a2),d2 *see if this voice uses trg205 bne exnend2 *jump if not206 * 207 move.w #-1,(a2) *set entry to -1208 move.l a2,-(a7) *save a2 on stack209 move.w d1,-(a7) *save d1 on stack210 move.w d2,-(a7) *save d2 on stack211 lea _vce2grp,a1 *put group on stack212 move.w d1,d0 *...213 add.w d0,d0 *...214 move.w 0(a1,d0.W),-(a7) *...215 move.w d2,-(a7) *put trg on stack216 jsr _procpfl *process sustained voices217 addq.l #4,a7 *clean up stack218 move.w (a7)+,d2 *restore d2219 move.w (a7)+,d1 *restore d1220 movea.l (a7)+,a2 *restore a2221 * 222 exnend2: addq.l #2,a2 *point at next vce2trg entry223 addq.w #1,d1 *loop until all are checked224 cmp.w #12,d1 *...225 bne exnend1 *...226 * 227 bra exexit *done228 * 229 .page 230 * 231 *exsbgn -- execute section begin232 *------ ---------------------233 exsbgn: clr.w d0 *get section number234 move.b E_DATA1(a0),d0 *...235 move.w d0,_cursect *set section number236 bra exexit *done237 * 238 *exasgn -- execute assignment event239 *------ ------------------------240 exasgn: clr.w d0 *get assignment241 move.b E_DATA1(a0),d0 *...242 move.w d0,-(a7) *getasg(curasg = asgn)243 move.w d0,_curasg *...244 jsr _getasg *...245 tst.w (a7)+ *...246 bra exexit *done247 * 248 *extune -- execute tuning event249 *------ --------------------250 extune: clr.w d0 *get tuning251 move.b E_DATA1(a0),d0 *...252 move.w d0,-(a7) *gettun(tuning)253 jsr _gettun *...254 tst.w (a7)+ *...255 bra exexit *done256 * 257 *extrns -- execute transposition event258 *------ ---------------------------259 extrns: clr.w d0 *get group number260 move.b E_DATA1(a0),d0 *...261 add.w d0,d0 *... as an index in d0262 lea _grpstat,a1 *check grpstat[grp]263 tst.w 0(a1,d0.W) *...264 beq exexit *done if disabled265 * 266 lea _s_trns,a1 *set group transposition267 move.w E_LFT(a0),0(a1,d0.W) *...268 jsr _settune *...269 bra exexit *done270 * 271 .page 272 * 273 *extmpo -- execute tempo event274 *------ -------------------275 extmpo: clr.w d0 *get tempo276 move.b E_DATA1(a0),d0 *...277 move.w d0,-(a7) *settmpo(tempo)278 jsr _settmpo *...279 tst.w (a7)+ *...280 bra exexit *done281 * 282 *exstop -- execute stop event283 *------ ------------------284 exstop: clr.w -(a7) *stop the clock285 jsr _clkset *...286 tst.w (a7)+ *...287 bra exexit *that's all, folks288 * 289 *exintp -- execute interpolate event290 *------ -------------------------291 exintp: move.w E_DATA1(a0),_curintp *set interpolate value292 bra exexit *done293 * 294 .page 295 * 296 *exinst -- execute instrument change event297 *------ -------------------------------298 exinst: clr.w d0 *get group number299 move.b E_DATA1(a0),d0 *... in d0300 add.w d0,d0 *... as a word offset301 lea _grpstat,a1 *check grpstat[grp]302 tst.w 0(a1,d0.W) *...303 beq exexit *done if not enabled304 * 305 lea _ins2grp,a1 *point at ins2grp[]306 clr.w d0 *get instrument number307 move.b E_DATA2(a0),d0 *... in d0308 clr.w d1 *get group number309 move.b E_DATA1(a0),d1 *... in d1310 move.w d1,-(a7) *put group number on stack311 add.w d1,d1 *make d1 a word pointer312 move.w 0(a1,d1.W),d2 *get ins2grp[group]313 and.w # $FF00,d2 *mask off GTAG1..GTAG8314 or.w d0,d2 *OR in new instrument number315 move.w d2,0(a1,d1.W) *set ins2grp[group]316 jsr _setv2gi *setv2gi(group)317 tst.w (a7)+ *clean up stack318 bra exexit *done319 * 320 .page 321 * 322 *exdyn -- execute dynamics event323 *----- ----------------------324 exdyn: clr.w d0 *get group number325 move.b E_DATA1(a0),d0 *... in d0326 add.w d0,d0 *... as a word offset327 lea _grpstat,a1 *check grpstat[grp]328 tst.w 0(a1,d0.W) *...329 beq exexit *done if not enabled330 * 331 clr.w d0 *get dynamics332 move.b E_DATA2(a0),d0 *... in d0333 clr.w d1 *get group number334 move.b E_DATA1(a0),d1 *... in d1335 move.w d0,-(a7) *setdyn(group, dyn)336 move.w d1,-(a7) *...337 jsr _setdyn *...338 adda.l #4,a7 *clean up stack339 bra exexit *done340 * 341 *exlocn -- execute location event342 *------ ----------------------343 exlocn: clr.w d0 *get group number344 move.b E_DATA1(a0),d0 *... in d0345 add.w d0,d0 *... as a word offset346 lea _grpstat,a1 *check grpstat[grp]347 tst.w 0(a1,d0.W) *...348 beq exexit *done if not enabled349 * 350 clr.w d0 *get location351 move.b E_DATA2(a0),d0 *... in d0352 clr.w d1 *get group number353 move.b E_DATA1(a0),d1 *... in d1354 move.w d0,-(a7) *setloc(group, loc)355 move.w d1,-(a7) *...356 jsr _setloc *...357 adda.l #4,a7 *clean up stack358 bra exexit *done359 * 360 .page 361 * 362 *exanrs -- execute analog resolution event363 *------ -------------------------------364 exanrs: move.b E_DATA1(a0),d0 *get group number365 andi.w # $000F,d0 *... in d0366 add.w d0,d0 *... as a word offset367 lea _grpstat,a1 *check grpstat[grp]368 tst.w 0(a1,d0.W) *...369 beq exexit *done if not enabled370 * 371 clr.w d1 *get variable / group numbers372 move.b E_DATA1(a0),d1 *...373 add.w d1,d1 *convert to word index374 clr.w d0 *get resolution375 move.b E_DATA2(a0),d0 *... in d0376 lea _anrs,a1 *point at resolution table base377 move.w d0,0(a1,d1.W) *save resolution in table378 bra exexit *done379 * 380 *exanvl -- execute analog value event381 *------ --------------------------382 exanvl: move.b E_DATA1(a0),d0 *get group number383 andi.w # $000F,d0 *... in d0384 add.w d0,d0 *... as a word offset385 lea _grpstat,a1 *check grpstat[grp]386 tst.w 0(a1,d0.W) *...387 beq exexit *done if not enabled388 * 389 move.w E_DN(a0),-(a7) *put value on stack390 clr.w d2 *get variable / group numbers391 move.b E_DATA1(a0),d2 *... into d2392 move.w d2,d1 *extract group number393 andi.w # $000F,d1 *... into d1394 lsr.w #3,d2 *extract variable number395 andi.w # $001E,d2 *... as a word index in d2396 lea _var2src,a1 *point at variable map397 move.w 0(a1,d2.W),-(a7) *put source number on stack398 move.w d1,-(a7) *put group number on stack399 jsr _setsv *setsv(group, src, val)400 adda.l #6,a7 *clean up stack401 bra exexit *done402 * 403 *exnext -- next score404 *------ ----------405 exnext: move.w #1,_nxtflag *set next score flag406 bra exexit *done407 * 408 .page 409 * 410 *expnch -- execute punch in/out411 *------ --------------------412 expnch: tst.w _recsw *recording ?413 beq exexit *ignore if not414 * 415 tst.w E_DATA1(a0) *punch in ?416 bne expnch5 *jump if so417 * 418 *punch out419 * 420 lea _grpmode,a1 *setup for group modes421 move.w #11,d0 *...422 * 423 expnch0: cmpi.w #2,(a1) *in record mode ?424 bne expnch1 *jump if not425 * 426 clr.w (a1) *set to play mode427 * 428 expnch1: addq.l #2,a1 *point at next entry429 dbra d0,expnch0 *loop through all groups430 * 431 lea _varmode,a1 *setup for variable modes432 move.w #5,d1 *set variable count433 * 434 expnch4: clr.w d0 *clear offset435 * 436 expnch2: cmpi.w #2,0(a1,d0.W) *in record mode ?437 bne expnch3 *jump if not438 * 439 clr.w 0(a1,d0.W) *set to play mode440 * 441 expnch3: addq.w #2,d0 *update offset442 cmpi.w #24,d0 *check for final group443 bne expnch2 *loop through all groups444 * 445 add.l #32,a1 *point at next variable446 dbra d1,expnch4 *loop through all variables447 * 50 51 .page 52 53 | parameter offsets 54 | ----------------- 55 P_EP = 8 | WORD - 'ep' parameter offset 56 P_SD = 12 | WORD - 'sd' parameter offset 57 58 | event structure offsets -- MUST match score.h definitions 59 | ----------------------- ------------------------------ 60 | offset length 61 | ------ ------ 62 E_TIME = 0 | LONG 63 E_SIZE = 4 | BYTE 64 E_TYPE = 5 | BYTE 65 E_DATA1 = 6 | BYTE 66 E_NOTE = 6 | BYTE 67 E_DATA2 = 7 | BYTE 68 E_GROUP = 7 | BYTE 69 E_BAK = 8 | LONG 70 E_FWD = 12 | LONG 71 E_DN = 16 | LONG 72 E_VEL = 16 | WORD 73 E_DATA4 = 18 | WORD 74 E_UP = 20 | LONG 75 E_LFT = 24 | LONG 76 E_RGT = 28 | LONG 77 78 | Miscellaneous constants 79 | ----------------------- 80 N_ETYPES = 25 | number of event types 81 82 M_KSTATE = 0x01 | keys status bit 83 N_KSTATE = 0xFE | keys status bit complement 84 85 D_BAK = 1 | code for backward scrolling 86 87 LCL_PRT = 2 | 0-origin local port number 88 LCL_PCH = 0x1080 | port and channel for trigger 89 90 .page 91 92 | A few words about se_exec: 93 94 | se_exec has to be very fast, so it's written in assembly language, 95 | rather than C, which is usually pretty good, but not quite good enough 96 | for this application. The faster this routine runs, the higher the 97 | tempo we can keep up with. If this code is fast enough, we end up 98 | hardware limited by the timer. 99 100 _se_exec: link a6,#0 | link stack frames 101 movea.l P_EP(a6),a0 | get event pointer 'ep' into a0 102 move.l a0,_xevent | save in xevent 103 move.b E_TYPE(a0),d1 | get event type into d1.W 104 andi.w #0x007F,d1 | ... and mask off new-data flag 105 cmp.b #N_ETYPES,d1 | see if it's valid 106 blt sexc1 | jump if it is 107 108 BadEvnt: move.l a0,d0 | setup to return pointer we got 109 bra done | exit 110 111 exexit: movea.l _xevent,a0 | point at next event 112 move.l E_FWD(a0),d0 | ... 113 114 done: unlk a6 | done -- unlink stack frames 115 rts | return to caller 116 117 sexc1: lea sextab,a1 | get base of dispatch table 118 lsl.w #2,d1 | multiplty event by 4 for index 119 movea.l 0(a1,d1.W),a2 | get address of event routine 120 jmp (a2) | jump to event execution routine 121 122 | On entry, the individual execution routines only depend on a0 pointing at the 123 | event they were dispatched for. 124 125 | The usual C function register usage conventions apply: 126 127 | d0..d2 and a0..a2 are used for scratch, and are not preserved. 128 129 | d3..d6 and a3..a5 are register variables, and are preserved. 130 | a6 = frame pointer, a7 = stack pointer, and are preserved. 131 132 .page 133 134 | exnbeg -- execute note begin 135 | ------ ------------------ 136 | If things need to be sped up, we could incorporate the functions of 137 | asgvce() here, rather than calling it. asgvce() could also be re-written in 138 | assembly language to make it a shade faster. 139 140 exnbeg: cmpi.w #D_BAK,P_SD(a6) | check direction 141 beq nendex | if backward, treat as note end 142 143 nbegex: clr.w d1 | clear d1 144 move.b E_GROUP(a0),d1 | get group number 145 add.w d1,d1 | ... | 2 146 lea _grpstat,a1 | point at grpstat 147 tst.w 0(a1,d1.W) | see if group is enabled 148 beq exexit | done if not 149 150 move.b E_NOTE(a0),d1 | d1 = note number nn (0..127) 151 move.w #LCL_PCH,d2 | put port and channel in d2 152 add.w d1,d2 | d2 = trg 153 lea _trgtab,a1 | point at trgtab[trg] 154 move.b 0(a1,d2.W),d0 | ... 155 or.b #M_KSTATE,d0 | set trigger table entry on 156 move.b d0,0(a1,d2.W) | ... 157 lea _veltab,a1 | point at veltab 158 add.w d2,d2 | ... 159 move.w E_VEL(a0),0(a1,d2.W) | put velocity in veltab 160 move.w E_VEL(a0),-(a7) | put velocity on the stack 161 move.w d1,-(a7) | put note number on the stack 162 move.w #1,-(a7) | put channel on the stack 163 move.w #LCL_PRT,-(a7) | put port on the stack 164 move.b E_GROUP(a0),d1 | d1 = group number (0..11) 165 move.w d1,-(a7) | put group number on the stack 166 jsr _asgvce | start the note 167 add.l #10,a7 | clean up the stack 168 bra exexit | done 169 170 .page 171 172 | exnend -- execute note end 173 | ------ ---------------- 174 | If things need to be sped up, we could incorporate the functions of 175 | procpfl() here, rather than calling it. procpfl() could also be re-written in 176 | assembly language to make it a shade faster. 177 178 exnend: cmpi.w #D_BAK,P_SD(a6) | check direction 179 beq nbegex | if backward, treat as beginning 180 181 nendex: clr.w d1 | clear d1 182 move.b E_GROUP(a0),d1 | get group number 183 add.w d1,d1 | ... | 2 184 lea _grpstat,a1 | point at grpstat 185 tst.w 0(a1,d1.W) | check group status 186 beq exexit | done if disabled 187 188 move.b E_NOTE(a0),d1 | d1 = note number nn (0..127) 189 move.w #LCL_PCH,d2 | put port and channel in d2 190 add.w d1,d2 | d2 = trg | 2 191 add.w d2,d2 | ... 192 lea _trgtab,a1 | set trigger table entry off 193 move.b 0(a1,d2.W),d0 | ... 194 and.b #N_KSTATE,d0 | ... 195 move.b d0,0(a1,d2.W) | ... 196 bne exexit | done if note still active 197 198 .page 199 200 lsr.w #1,d2 | adjust d2 201 clr.w d1 | set loop index 202 lea _vce2trg,a2 | point at vce2trg table 203 204 exnend1: cmp.w (a2),d2 | see if this voice uses trg 205 bne exnend2 | jump if not 206 207 move.w #-1,(a2) | set entry to -1 208 move.l a2,-(a7) | save a2 on stack 209 move.w d1,-(a7) | save d1 on stack 210 move.w d2,-(a7) | save d2 on stack 211 lea _vce2grp,a1 | put group on stack 212 move.w d1,d0 | ... 213 add.w d0,d0 | ... 214 move.w 0(a1,d0.W),-(a7) | ... 215 move.w d2,-(a7) | put trg on stack 216 jsr _procpfl | process sustained voices 217 addq.l #4,a7 | clean up stack 218 move.w (a7)+,d2 | restore d2 219 move.w (a7)+,d1 | restore d1 220 movea.l (a7)+,a2 | restore a2 221 222 exnend2: addq.l #2,a2 | point at next vce2trg entry 223 addq.w #1,d1 | loop until all are checked 224 cmp.w #12,d1 | ... 225 bne exnend1 | ... 226 227 bra exexit | done 228 229 .page 230 231 | exsbgn -- execute section begin 232 | ------ --------------------- 233 exsbgn: clr.w d0 | get section number 234 move.b E_DATA1(a0),d0 | ... 235 move.w d0,_cursect | set section number 236 bra exexit | done 237 238 | exasgn -- execute assignment event 239 | ------ ------------------------ 240 exasgn: clr.w d0 | get assignment 241 move.b E_DATA1(a0),d0 | ... 242 move.w d0,-(a7) | getasg(curasg = asgn) 243 move.w d0,_curasg | ... 244 jsr _getasg | ... 245 tst.w (a7)+ | ... 246 bra exexit | done 247 248 | extune -- execute tuning event 249 | ------ -------------------- 250 extune: clr.w d0 | get tuning 251 move.b E_DATA1(a0),d0 | ... 252 move.w d0,-(a7) | gettun(tuning) 253 jsr _gettun | ... 254 tst.w (a7)+ | ... 255 bra exexit | done 256 257 | extrns -- execute transposition event 258 | ------ --------------------------- 259 extrns: clr.w d0 | get group number 260 move.b E_DATA1(a0),d0 | ... 261 add.w d0,d0 | ... as an index in d0 262 lea _grpstat,a1 | check grpstat[grp] 263 tst.w 0(a1,d0.W) | ... 264 beq exexit | done if disabled 265 266 lea _s_trns,a1 | set group transposition 267 move.w E_LFT(a0),0(a1,d0.W) | ... 268 jsr _settune | ... 269 bra exexit | done 270 271 .page 272 273 | extmpo -- execute tempo event 274 | ------ ------------------- 275 extmpo: clr.w d0 | get tempo 276 move.b E_DATA1(a0),d0 | ... 277 move.w d0,-(a7) | settmpo(tempo) 278 jsr _settmpo | ... 279 tst.w (a7)+ | ... 280 bra exexit | done 281 282 | exstop -- execute stop event 283 | ------ ------------------ 284 exstop: clr.w -(a7) | stop the clock 285 jsr _clkset | ... 286 tst.w (a7)+ | ... 287 bra exexit | that's all, folks 288 289 | exintp -- execute interpolate event 290 | ------ ------------------------- 291 exintp: move.w E_DATA1(a0),_curintp | set interpolate value 292 bra exexit | done 293 294 .page 295 296 | exinst -- execute instrument change event 297 | ------ ------------------------------- 298 exinst: clr.w d0 | get group number 299 move.b E_DATA1(a0),d0 | ... in d0 300 add.w d0,d0 | ... as a word offset 301 lea _grpstat,a1 | check grpstat[grp] 302 tst.w 0(a1,d0.W) | ... 303 beq exexit | done if not enabled 304 305 lea _ins2grp,a1 | point at ins2grp[] 306 clr.w d0 | get instrument number 307 move.b E_DATA2(a0),d0 | ... in d0 308 clr.w d1 | get group number 309 move.b E_DATA1(a0),d1 | ... in d1 310 move.w d1,-(a7) | put group number on stack 311 add.w d1,d1 | make d1 a word pointer 312 move.w 0(a1,d1.W),d2 | get ins2grp[group] 313 and.w #0xFF00,d2 | mask off GTAG1..GTAG8 314 or.w d0,d2 | OR in new instrument number 315 move.w d2,0(a1,d1.W) | set ins2grp[group] 316 jsr _setv2gi | setv2gi(group) 317 tst.w (a7)+ | clean up stack 318 bra exexit | done 319 320 .page 321 322 | exdyn -- execute dynamics event 323 | ----- ---------------------- 324 exdyn: clr.w d0 | get group number 325 move.b E_DATA1(a0),d0 | ... in d0 326 add.w d0,d0 | ... as a word offset 327 lea _grpstat,a1 | check grpstat[grp] 328 tst.w 0(a1,d0.W) | ... 329 beq exexit | done if not enabled 330 331 clr.w d0 | get dynamics 332 move.b E_DATA2(a0),d0 | ... in d0 333 clr.w d1 | get group number 334 move.b E_DATA1(a0),d1 | ... in d1 335 move.w d0,-(a7) | setdyn(group, dyn) 336 move.w d1,-(a7) | ... 337 jsr _setdyn | ... 338 adda.l #4,a7 | clean up stack 339 bra exexit | done 340 341 | exlocn -- execute location event 342 | ------ ---------------------- 343 exlocn: clr.w d0 | get group number 344 move.b E_DATA1(a0),d0 | ... in d0 345 add.w d0,d0 | ... as a word offset 346 lea _grpstat,a1 | check grpstat[grp] 347 tst.w 0(a1,d0.W) | ... 348 beq exexit | done if not enabled 349 350 clr.w d0 | get location 351 move.b E_DATA2(a0),d0 | ... in d0 352 clr.w d1 | get group number 353 move.b E_DATA1(a0),d1 | ... in d1 354 move.w d0,-(a7) | setloc(group, loc) 355 move.w d1,-(a7) | ... 356 jsr _setloc | ... 357 adda.l #4,a7 | clean up stack 358 bra exexit | done 359 360 .page 361 362 | exanrs -- execute analog resolution event 363 | ------ ------------------------------- 364 exanrs: move.b E_DATA1(a0),d0 | get group number 365 andi.w #0x000F,d0 | ... in d0 366 add.w d0,d0 | ... as a word offset 367 lea _grpstat,a1 | check grpstat[grp] 368 tst.w 0(a1,d0.W) | ... 369 beq exexit | done if not enabled 370 371 clr.w d1 | get variable / group numbers 372 move.b E_DATA1(a0),d1 | ... 373 add.w d1,d1 | convert to word index 374 clr.w d0 | get resolution 375 move.b E_DATA2(a0),d0 | ... in d0 376 lea _anrs,a1 | point at resolution table base 377 move.w d0,0(a1,d1.W) | save resolution in table 378 bra exexit | done 379 380 | exanvl -- execute analog value event 381 | ------ -------------------------- 382 exanvl: move.b E_DATA1(a0),d0 | get group number 383 andi.w #0x000F,d0 | ... in d0 384 add.w d0,d0 | ... as a word offset 385 lea _grpstat,a1 | check grpstat[grp] 386 tst.w 0(a1,d0.W) | ... 387 beq exexit | done if not enabled 388 389 move.w E_DN(a0),-(a7) | put value on stack 390 clr.w d2 | get variable / group numbers 391 move.b E_DATA1(a0),d2 | ... into d2 392 move.w d2,d1 | extract group number 393 andi.w #0x000F,d1 | ... into d1 394 lsr.w #3,d2 | extract variable number 395 andi.w #0x001E,d2 | ... as a word index in d2 396 lea _var2src,a1 | point at variable map 397 move.w 0(a1,d2.W),-(a7) | put source number on stack 398 move.w d1,-(a7) | put group number on stack 399 jsr _setsv | setsv(group, src, val) 400 adda.l #6,a7 | clean up stack 401 bra exexit | done 402 403 | exnext -- next score 404 | ------ ---------- 405 exnext: move.w #1,_nxtflag | set next score flag 406 bra exexit | done 407 408 .page 409 410 | expnch -- execute punch in/out 411 | ------ -------------------- 412 expnch: tst.w _recsw | recording ? 413 beq exexit | ignore if not 414 415 tst.w E_DATA1(a0) | punch in ? 416 bne expnch5 | jump if so 417 418 | punch out 419 420 lea _grpmode,a1 | setup for group modes 421 move.w #11,d0 | ... 422 423 expnch0: cmpi.w #2,(a1) | in record mode ? 424 bne expnch1 | jump if not 425 426 clr.w (a1) | set to play mode 427 428 expnch1: addq.l #2,a1 | point at next entry 429 dbra d0,expnch0 | loop through all groups 430 431 lea _varmode,a1 | setup for variable modes 432 move.w #5,d1 | set variable count 433 434 expnch4: clr.w d0 | clear offset 435 436 expnch2: cmpi.w #2,0(a1,d0.W) | in record mode ? 437 bne expnch3 | jump if not 438 439 clr.w 0(a1,d0.W) | set to play mode 440 441 expnch3: addq.w #2,d0 | update offset 442 cmpi.w #24,d0 | check for final group 443 bne expnch2 | loop through all groups 444 445 add.l #32,a1 | point at next variable 446 dbra d1,expnch4 | loop through all variables 447 448 448 bra exexit 449 * 450 .page 451 * 452 *punch in453 * 454 expnch5: lea _grpmode,a1 *setup for group modes455 move.w #11,d0 *...456 * 457 expnch6: cmpi.w #1,(a1) *in standby mode ?458 bne expnch7 *jump if not459 * 460 move.w #2,(a1) *set to record mode461 * 462 expnch7: addq.l #2,a1 *point at next entry463 dbra d0,expnch6 *loop through all groups464 * 465 lea _varmode,a1 *setup for variable modes466 move.w #5,d1 *set variable count467 * 468 expnch10: clr.w d0 *clear offset469 * 470 expnch8: cmpi.w #1,0(a1,d0.W) *in standby mode ?471 bne expnch9 *jump if not472 * 473 move.w #2,0(a1,d0.W) *set to record mode474 * 475 expnch9: addq.w #2,d0 *update offset476 cmpi.w #24,d0 *check for final group477 bne expnch8 *loop through all groups478 * 479 adda.l #32,a1 *point at next variable480 dbra d1,expnch10 *loop through all variables481 * 449 450 .page 451 452 | punch in 453 454 expnch5: lea _grpmode,a1 | setup for group modes 455 move.w #11,d0 | ... 456 457 expnch6: cmpi.w #1,(a1) | in standby mode ? 458 bne expnch7 | jump if not 459 460 move.w #2,(a1) | set to record mode 461 462 expnch7: addq.l #2,a1 | point at next entry 463 dbra d0,expnch6 | loop through all groups 464 465 lea _varmode,a1 | setup for variable modes 466 move.w #5,d1 | set variable count 467 468 expnch10: clr.w d0 | clear offset 469 470 expnch8: cmpi.w #1,0(a1,d0.W) | in standby mode ? 471 bne expnch9 | jump if not 472 473 move.w #2,0(a1,d0.W) | set to record mode 474 475 expnch9: addq.w #2,d0 | update offset 476 cmpi.w #24,d0 | check for final group 477 bne expnch8 | loop through all groups 478 479 adda.l #32,a1 | point at next variable 480 dbra d1,expnch10 | loop through all variables 481 482 482 bra exexit 483 * 484 .page 485 * 486 *sextab -- score execution dispatch table -- MUST match score.h definitions487 *------ ----------------------------------------------------------------488 sextab: dc.l exexit *0 null489 dc.l exexit *1 score begin490 dc.l exsbgn *2 section begin491 dc.l exexit *3 section end492 dc.l exinst *4 instrument change493 dc.l exnbeg *5 note begin494 dc.l exnend *6 note end495 dc.l exstop *7 stop496 dc.l exintp *8 interpolate497 dc.l extmpo *9 tempo498 dc.l extune *10 tuning499 dc.l exexit *11 group status500 dc.l exlocn *12 location501 dc.l exdyn *13 dynamics502 dc.l exanvl *14 analog value503 dc.l exanrs *15 analog resolution504 dc.l exasgn *16 I/O assign505 dc.l extrns *17 transposition506 dc.l exexit *18 repeat507 dc.l expnch *19 punch in/out508 dc.l exexit *20 -unused- (polyphonic pressure)509 dc.l exexit *21 score end510 dc.l exexit *22 -unused- (channel pressure)511 dc.l exexit *23 bar marker512 dc.l exnext *24 next score513 * 483 484 .page 485 486 | sextab -- score execution dispatch table -- MUST match score.h definitions 487 | ------ ---------------------------------------------------------------- 488 sextab: dc.l exexit | 0 null 489 dc.l exexit | 1 score begin 490 dc.l exsbgn | 2 section begin 491 dc.l exexit | 3 section end 492 dc.l exinst | 4 instrument change 493 dc.l exnbeg | 5 note begin 494 dc.l exnend | 6 note end 495 dc.l exstop | 7 stop 496 dc.l exintp | 8 interpolate 497 dc.l extmpo | 9 tempo 498 dc.l extune | 10 tuning 499 dc.l exexit | 11 group status 500 dc.l exlocn | 12 location 501 dc.l exdyn | 13 dynamics 502 dc.l exanvl | 14 analog value 503 dc.l exanrs | 15 analog resolution 504 dc.l exasgn | 16 I/O assign 505 dc.l extrns | 17 transposition 506 dc.l exexit | 18 repeat 507 dc.l expnch | 19 punch in/out 508 dc.l exexit | 20 -unused- (polyphonic pressure) 509 dc.l exexit | 21 score end 510 dc.l exexit | 22 -unused- (channel pressure) 511 dc.l exexit | 23 bar marker 512 dc.l exnext | 24 next score 513 514 514 .bss 515 * 516 *Variable storage areas517 *----------------------518 *globals:519 *--------520 _xevent: ds.l 1 *next event pointer521 * 515 516 | Variable storage areas 517 | ---------------------- 518 | globals: 519 | -------- 520 _xevent: ds.l 1 | next event pointer 521 522 522 .end
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