Routines
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55983: Draw Wide Entity Sprite
Used by the routines at Step_Wide_Entity_Approach, Kill_Wall_Bouncing_Enemy and Animate_Wall_Bouncing_Enemy_Death.
Draws a 3-byte-wide, 16-row entity sprite to the screen by toggling each row's pixel data against the existing screen content. Applying this routine twice draws and then erases a sprite, leaving the screen unchanged. Row screen addresses come from the row address lookup table at Sprite_Pixel_Data_Table, offset by the entity's column position. Rows outside the play area (16 top / 176 bottom) are skipped. Called to draw and erase entity sprites during normal gameplay and death animations.
Input
HL Entity record pointer
Read the sprite data pointer and compute the screen address origin.
Draw_Wide_Entity_Sprite_Pixels_Only 55983 LD B,H Stash the entity record pointer in BC.
55984 LD C,L
55985 LD E,(HL) Read the entity type, double it as an index into Sprite_Pixel_Data_Table, and load the sprite data pointer into DE.
55986 SLA E
55988 LD D,0
55990 LD HL,50700
55993 ADD HL,DE
55994 LD E,(HL)
55995 INC HL
55996 LD D,(HL)
55997 LD H,B Restore the entity record pointer and advance to the Y field.
55998 LD L,C
55999 INC HL
56000 LD B,70 Load row stride 70 into B, read the entity Y position, and save it in D'.
56002 LD C,(HL)
56003 LD A,C
56004 EXX
56005 LD D,A
56006 EXX
56007 SLA C Scale the Y position into the row address table range.
56009 RL B
56011 PUSH BC Stash the scaled Y and row stride on the stack.
56012 INC HL Read the X position and derive the column address via three-step rotation.
56013 LD A,(HL)
56014 AND A
56015 LD HL,0
56018 RRA
56019 RR L
56021 RRA
56022 RR L
56024 RRA
56025 RR L
56027 EXX Save the sub-column pixel offset in C'.
56028 LD C,A
56029 EXX
56030 LD A,L Adjust the column address to align with two-byte row table entries.
56031 RRCA
56032 ADD A,L
56033 LD L,A
56034 LD A,H
56035 ADC A,0
56037 LD H,A
56038 ADD HL,DE Combine the column address with the sprite data pointer and move the result to BC.
56039 LD B,H
56040 LD C,L
56041 POP HL Restore the scaled Y position from the stack.
56042 EXX Retrieve the entity Y position from D'.
56043 LD A,D
56044 EXX
56045 CP 176 Return if the entity is below the play area.
56047 RET NC
Row 0: skip if above the play area, compute screen address, draw.
56048 CP 16 Skip row 0 if the entity is above the play area.
56050 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row1
56052 EXX Load the column pixel offset from C'.
56053 LD A,C
56054 EXX
56055 ADD A,(HL) Add the column offset to the row address and load the screen address into DE.
56056 LD E,A
56057 INC HL
56058 LD D,(HL)
56059 INC HL
56060 EX DE,HL Exchange DE and HL to point at the screen address.
56061 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56062 XOR (HL)
56063 LD (HL),A
56064 INC BC
56065 INC HL
56066 LD A,(BC)
56067 XOR (HL)
56068 LD (HL),A
56069 INC BC
56070 INC HL
56071 LD A,(BC)
56072 XOR (HL)
56073 LD (HL),A
56074 EX DE,HL Restore HL to the row address table pointer.
56075 DEC BC Step the sprite data pointer back two bytes to the row start.
56076 DEC BC
Row 1: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row1 56077 INC BC Advance the sprite data pointer to row 1.
56078 INC BC
56079 INC BC
56080 EXX Advance Y by the row stride and decrement the step count.
56081 LD A,B
56082 ADD A,D
56083 LD D,A
56084 LD A,B
56085 EXX
56086 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row1_Step 56087 INC HL Step HL through the row address table.
56088 INC HL
56089 DEC A
56090 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row1_Step
56092 EXX Retrieve Y; return if below the play area.
56093 LD A,D
56094 EXX
56095 CP 176
56097 RET NC
56098 CP 16 Skip row 1 if above the play area.
56100 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row2
56102 EXX Load the column offset and compute the screen address.
56103 LD A,C
56104 EXX
56105 ADD A,(HL)
56106 LD E,A
56107 INC HL
56108 LD D,(HL)
56109 INC HL
56110 EX DE,HL
56111 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56112 XOR (HL)
56113 LD (HL),A
56114 INC BC
56115 INC HL
56116 LD A,(BC)
56117 XOR (HL)
56118 LD (HL),A
56119 INC BC
56120 INC HL
56121 LD A,(BC)
56122 XOR (HL)
56123 LD (HL),A
56124 EX DE,HL Restore the row table pointer and step back the sprite data.
56125 DEC BC
56126 DEC BC
Row 2: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row2 56127 INC BC Advance the sprite data pointer to row 2.
56128 INC BC
56129 INC BC
56130 EXX Advance Y by the row stride and decrement the step count.
56131 LD A,B
56132 ADD A,D
56133 LD D,A
56134 LD A,B
56135 EXX
56136 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row2_Step 56137 INC HL Step HL through the row address table.
56138 INC HL
56139 DEC A
56140 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row2_Step
56142 EXX Retrieve Y; return if below the play area.
56143 LD A,D
56144 EXX
56145 CP 176
56147 RET NC
56148 CP 16 Skip row 2 if above the play area.
56150 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row3
56152 EXX Load the column offset and compute the screen address.
56153 LD A,C
56154 EXX
56155 ADD A,(HL)
56156 LD E,A
56157 INC HL
56158 LD D,(HL)
56159 INC HL
56160 EX DE,HL
56161 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56162 XOR (HL)
56163 LD (HL),A
56164 INC BC
56165 INC HL
56166 LD A,(BC)
56167 XOR (HL)
56168 LD (HL),A
56169 INC BC
56170 INC HL
56171 LD A,(BC)
56172 XOR (HL)
56173 LD (HL),A
56174 EX DE,HL Restore the row table pointer and step back the sprite data.
56175 DEC BC
56176 DEC BC
Row 3: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row3 56177 INC BC Advance the sprite data pointer to row 3.
56178 INC BC
56179 INC BC
56180 EXX Advance Y by the row stride and decrement the step count.
56181 LD A,B
56182 ADD A,D
56183 LD D,A
56184 LD A,B
56185 EXX
56186 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row3_Step 56187 INC HL Step HL through the row address table.
56188 INC HL
56189 DEC A
56190 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row3_Step
56192 EXX Retrieve Y; return if below the play area.
56193 LD A,D
56194 EXX
56195 CP 176
56197 RET NC
56198 CP 16 Skip row 3 if above the play area.
56200 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row4
56202 EXX Load the column offset and compute the screen address.
56203 LD A,C
56204 EXX
56205 ADD A,(HL)
56206 LD E,A
56207 INC HL
56208 LD D,(HL)
56209 INC HL
56210 EX DE,HL
56211 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56212 XOR (HL)
56213 LD (HL),A
56214 INC BC
56215 INC HL
56216 LD A,(BC)
56217 XOR (HL)
56218 LD (HL),A
56219 INC BC
56220 INC HL
56221 LD A,(BC)
56222 XOR (HL)
56223 LD (HL),A
56224 EX DE,HL Restore the row table pointer and step back the sprite data.
56225 DEC BC
56226 DEC BC
Row 4: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row4 56227 INC BC Advance the sprite data pointer to row 4.
56228 INC BC
56229 INC BC
56230 EXX Advance Y by the row stride and decrement the step count.
56231 LD A,B
56232 ADD A,D
56233 LD D,A
56234 LD A,B
56235 EXX
56236 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row4_Step 56237 INC HL Step HL through the row address table.
56238 INC HL
56239 DEC A
56240 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row4_Step
56242 EXX Retrieve Y; return if below the play area.
56243 LD A,D
56244 EXX
56245 CP 176
56247 RET NC
56248 CP 16 Skip row 4 if above the play area.
56250 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row5
56252 EXX Load the column offset and compute the screen address.
56253 LD A,C
56254 EXX
56255 ADD A,(HL)
56256 LD E,A
56257 INC HL
56258 LD D,(HL)
56259 INC HL
56260 EX DE,HL
56261 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56262 XOR (HL)
56263 LD (HL),A
56264 INC BC
56265 INC HL
56266 LD A,(BC)
56267 XOR (HL)
56268 LD (HL),A
56269 INC BC
56270 INC HL
56271 LD A,(BC)
56272 XOR (HL)
56273 LD (HL),A
56274 EX DE,HL Restore the row table pointer and step back the sprite data.
56275 DEC BC
56276 DEC BC
Row 5: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row5 56277 INC BC Advance the sprite data pointer to row 5.
56278 INC BC
56279 INC BC
56280 EXX Advance Y by the row stride and decrement the step count.
56281 LD A,B
56282 ADD A,D
56283 LD D,A
56284 LD A,B
56285 EXX
56286 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row5_Step 56287 INC HL Step HL through the row address table.
56288 INC HL
56289 DEC A
56290 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row5_Step
56292 EXX Retrieve Y; return if below the play area.
56293 LD A,D
56294 EXX
56295 CP 176
56297 RET NC
56298 CP 16 Skip row 5 if above the play area.
56300 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row6
56302 EXX Load the column offset and compute the screen address.
56303 LD A,C
56304 EXX
56305 ADD A,(HL)
56306 LD E,A
56307 INC HL
56308 LD D,(HL)
56309 INC HL
56310 EX DE,HL
56311 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56312 XOR (HL)
56313 LD (HL),A
56314 INC BC
56315 INC HL
56316 LD A,(BC)
56317 XOR (HL)
56318 LD (HL),A
56319 INC BC
56320 INC HL
56321 LD A,(BC)
56322 XOR (HL)
56323 LD (HL),A
56324 EX DE,HL Restore the row table pointer and step back the sprite data.
56325 DEC BC
56326 DEC BC
Row 6: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row6 56327 INC BC Advance the sprite data pointer to row 6.
56328 INC BC
56329 INC BC
56330 EXX Advance Y by the row stride and decrement the step count.
56331 LD A,B
56332 ADD A,D
56333 LD D,A
56334 LD A,B
56335 EXX
56336 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row6_Step 56337 INC HL Step HL through the row address table.
56338 INC HL
56339 DEC A
56340 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row6_Step
56342 EXX Retrieve Y; return if below the play area.
56343 LD A,D
56344 EXX
56345 CP 176
56347 RET NC
56348 CP 16 Skip row 6 if above the play area.
56350 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row7
56352 EXX Load the column offset and compute the screen address.
56353 LD A,C
56354 EXX
56355 ADD A,(HL)
56356 LD E,A
56357 INC HL
56358 LD D,(HL)
56359 INC HL
56360 EX DE,HL
56361 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56362 XOR (HL)
56363 LD (HL),A
56364 INC BC
56365 INC HL
56366 LD A,(BC)
56367 XOR (HL)
56368 LD (HL),A
56369 INC BC
56370 INC HL
56371 LD A,(BC)
56372 XOR (HL)
56373 LD (HL),A
56374 EX DE,HL Restore the row table pointer and step back the sprite data.
56375 DEC BC
56376 DEC BC
Row 7: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row7 56377 INC BC Advance the sprite data pointer to row 7.
56378 INC BC
56379 INC BC
56380 EXX Advance Y by the row stride and decrement the step count.
56381 LD A,B
56382 ADD A,D
56383 LD D,A
56384 LD A,B
56385 EXX
56386 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row7_Step 56387 INC HL Step HL through the row address table.
56388 INC HL
56389 DEC A
56390 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row7_Step
56392 EXX Retrieve Y; return if below the play area.
56393 LD A,D
56394 EXX
56395 CP 176
56397 RET NC
56398 CP 16 Skip row 7 if above the play area.
56400 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row8
56402 EXX Load the column offset and compute the screen address.
56403 LD A,C
56404 EXX
56405 ADD A,(HL)
56406 LD E,A
56407 INC HL
56408 LD D,(HL)
56409 INC HL
56410 EX DE,HL
56411 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56412 XOR (HL)
56413 LD (HL),A
56414 INC BC
56415 INC HL
56416 LD A,(BC)
56417 XOR (HL)
56418 LD (HL),A
56419 INC BC
56420 INC HL
56421 LD A,(BC)
56422 XOR (HL)
56423 LD (HL),A
56424 EX DE,HL Restore the row table pointer and step back the sprite data.
56425 DEC BC
56426 DEC BC
Row 8: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row8 56427 INC BC Advance the sprite data pointer to row 8.
56428 INC BC
56429 INC BC
56430 EXX Advance Y by the row stride and decrement the step count.
56431 LD A,B
56432 ADD A,D
56433 LD D,A
56434 LD A,B
56435 EXX
56436 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row8_Step 56437 INC HL Step HL through the row address table.
56438 INC HL
56439 DEC A
56440 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row8_Step
56442 EXX Retrieve Y; return if below the play area.
56443 LD A,D
56444 EXX
56445 CP 176
56447 RET NC
56448 CP 16 Skip row 8 if above the play area.
56450 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row9
56452 EXX Load the column offset and compute the screen address.
56453 LD A,C
56454 EXX
56455 ADD A,(HL)
56456 LD E,A
56457 INC HL
56458 LD D,(HL)
56459 INC HL
56460 EX DE,HL
56461 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56462 XOR (HL)
56463 LD (HL),A
56464 INC BC
56465 INC HL
56466 LD A,(BC)
56467 XOR (HL)
56468 LD (HL),A
56469 INC BC
56470 INC HL
56471 LD A,(BC)
56472 XOR (HL)
56473 LD (HL),A
56474 EX DE,HL Restore the row table pointer and step back the sprite data.
56475 DEC BC
56476 DEC BC
Row 9: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row9 56477 INC BC Advance the sprite data pointer to row 9.
56478 INC BC
56479 INC BC
56480 EXX Advance Y by the row stride and decrement the step count.
56481 LD A,B
56482 ADD A,D
56483 LD D,A
56484 LD A,B
56485 EXX
56486 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row9_Step 56487 INC HL Step HL through the row address table.
56488 INC HL
56489 DEC A
56490 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row9_Step
56492 EXX Retrieve Y; return if below the play area.
56493 LD A,D
56494 EXX
56495 CP 176
56497 RET NC
56498 CP 16 Skip row 9 if above the play area.
56500 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row10
56502 EXX Load the column offset and compute the screen address.
56503 LD A,C
56504 EXX
56505 ADD A,(HL)
56506 LD E,A
56507 INC HL
56508 LD D,(HL)
56509 INC HL
56510 EX DE,HL
56511 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56512 XOR (HL)
56513 LD (HL),A
56514 INC BC
56515 INC HL
56516 LD A,(BC)
56517 XOR (HL)
56518 LD (HL),A
56519 INC BC
56520 INC HL
56521 LD A,(BC)
56522 XOR (HL)
56523 LD (HL),A
56524 EX DE,HL Restore the row table pointer and step back the sprite data.
56525 DEC BC
56526 DEC BC
Row 10: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row10 56527 INC BC Advance the sprite data pointer to row 10.
56528 INC BC
56529 INC BC
56530 EXX Advance Y by the row stride and decrement the step count.
56531 LD A,B
56532 ADD A,D
56533 LD D,A
56534 LD A,B
56535 EXX
56536 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row10_Step 56537 INC HL Step HL through the row address table.
56538 INC HL
56539 DEC A
56540 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row10_Step
56542 EXX Retrieve Y; return if below the play area.
56543 LD A,D
56544 EXX
56545 CP 176
56547 RET NC
56548 CP 16 Skip row 10 if above the play area.
56550 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row11
56552 EXX Load the column offset and compute the screen address.
56553 LD A,C
56554 EXX
56555 ADD A,(HL)
56556 LD E,A
56557 INC HL
56558 LD D,(HL)
56559 INC HL
56560 EX DE,HL
56561 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56562 XOR (HL)
56563 LD (HL),A
56564 INC BC
56565 INC HL
56566 LD A,(BC)
56567 XOR (HL)
56568 LD (HL),A
56569 INC BC
56570 INC HL
56571 LD A,(BC)
56572 XOR (HL)
56573 LD (HL),A
56574 EX DE,HL Restore the row table pointer and step back the sprite data.
56575 DEC BC
56576 DEC BC
Row 11: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row11 56577 INC BC Advance the sprite data pointer to row 11.
56578 INC BC
56579 INC BC
56580 EXX Advance Y by the row stride and decrement the step count.
56581 LD A,B
56582 ADD A,D
56583 LD D,A
56584 LD A,B
56585 EXX
56586 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row11_Step 56587 INC HL Step HL through the row address table.
56588 INC HL
56589 DEC A
56590 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row11_Step
56592 EXX Retrieve Y; return if below the play area.
56593 LD A,D
56594 EXX
56595 CP 176
56597 RET NC
56598 CP 16 Skip row 11 if above the play area.
56600 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row12
56602 EXX Load the column offset and compute the screen address.
56603 LD A,C
56604 EXX
56605 ADD A,(HL)
56606 LD E,A
56607 INC HL
56608 LD D,(HL)
56609 INC HL
56610 EX DE,HL
56611 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56612 XOR (HL)
56613 LD (HL),A
56614 INC BC
56615 INC HL
56616 LD A,(BC)
56617 XOR (HL)
56618 LD (HL),A
56619 INC BC
56620 INC HL
56621 LD A,(BC)
56622 XOR (HL)
56623 LD (HL),A
56624 EX DE,HL Restore the row table pointer and step back the sprite data.
56625 DEC BC
56626 DEC BC
Row 12: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row12 56627 INC BC Advance the sprite data pointer to row 12.
56628 INC BC
56629 INC BC
56630 EXX Advance Y by the row stride and decrement the step count.
56631 LD A,B
56632 ADD A,D
56633 LD D,A
56634 LD A,B
56635 EXX
56636 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row12_Step 56637 INC HL Step HL through the row address table.
56638 INC HL
56639 DEC A
56640 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row12_Step
56642 EXX Retrieve Y; return if below the play area.
56643 LD A,D
56644 EXX
56645 CP 176
56647 RET NC
56648 CP 16 Skip row 12 if above the play area.
56650 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row13
56652 EXX Load the column offset and compute the screen address.
56653 LD A,C
56654 EXX
56655 ADD A,(HL)
56656 LD E,A
56657 INC HL
56658 LD D,(HL)
56659 INC HL
56660 EX DE,HL
56661 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56662 XOR (HL)
56663 LD (HL),A
56664 INC BC
56665 INC HL
56666 LD A,(BC)
56667 XOR (HL)
56668 LD (HL),A
56669 INC BC
56670 INC HL
56671 LD A,(BC)
56672 XOR (HL)
56673 LD (HL),A
56674 EX DE,HL Restore the row table pointer and step back the sprite data.
56675 DEC BC
56676 DEC BC
Row 13: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row13 56677 INC BC Advance the sprite data pointer to row 13.
56678 INC BC
56679 INC BC
56680 EXX Advance Y by the row stride and decrement the step count.
56681 LD A,B
56682 ADD A,D
56683 LD D,A
56684 LD A,B
56685 EXX
56686 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row13_Step 56687 INC HL Step HL through the row address table.
56688 INC HL
56689 DEC A
56690 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row13_Step
56692 EXX Retrieve Y; return if below the play area.
56693 LD A,D
56694 EXX
56695 CP 176
56697 RET NC
56698 CP 16 Skip row 13 if above the play area.
56700 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row14
56702 EXX Load the column offset and compute the screen address.
56703 LD A,C
56704 EXX
56705 ADD A,(HL)
56706 LD E,A
56707 INC HL
56708 LD D,(HL)
56709 INC HL
56710 EX DE,HL
56711 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56712 XOR (HL)
56713 LD (HL),A
56714 INC BC
56715 INC HL
56716 LD A,(BC)
56717 XOR (HL)
56718 LD (HL),A
56719 INC BC
56720 INC HL
56721 LD A,(BC)
56722 XOR (HL)
56723 LD (HL),A
56724 EX DE,HL Restore the row table pointer and step back the sprite data.
56725 DEC BC
56726 DEC BC
Row 14: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row14 56727 INC BC Advance the sprite data pointer to row 14.
56728 INC BC
56729 INC BC
56730 EXX Advance Y by the row stride and decrement the step count.
56731 LD A,B
56732 ADD A,D
56733 LD D,A
56734 LD A,B
56735 EXX
56736 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row14_Step 56737 INC HL Step HL through the row address table.
56738 INC HL
56739 DEC A
56740 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row14_Step
56742 EXX Retrieve Y; return if below the play area.
56743 LD A,D
56744 EXX
56745 CP 176
56747 RET NC
56748 CP 16 Skip row 14 if above the play area.
56750 JR C,Draw_Wide_Entity_Sprite_Pixels_Only_Row15
56752 EXX Load the column offset and compute the screen address.
56753 LD A,C
56754 EXX
56755 ADD A,(HL)
56756 LD E,A
56757 INC HL
56758 LD D,(HL)
56759 INC HL
56760 EX DE,HL
56761 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56762 XOR (HL)
56763 LD (HL),A
56764 INC BC
56765 INC HL
56766 LD A,(BC)
56767 XOR (HL)
56768 LD (HL),A
56769 INC BC
56770 INC HL
56771 LD A,(BC)
56772 XOR (HL)
56773 LD (HL),A
56774 EX DE,HL Restore the row table pointer and step back the sprite data.
56775 DEC BC
56776 DEC BC
Row 15: advance sprite data, step Y, walk address table, draw.
Draw_Wide_Entity_Sprite_Pixels_Only_Row15 56777 INC BC Advance the sprite data pointer to row 15.
56778 INC BC
56779 INC BC
56780 EXX Advance Y by the row stride and decrement the step count.
56781 LD A,B
56782 ADD A,D
56783 LD D,A
56784 LD A,B
56785 EXX
56786 DEC A
Draw_Wide_Entity_Sprite_Pixels_Only_Row15_Step 56787 INC HL Step HL through the row address table.
56788 INC HL
56789 DEC A
56790 JR NZ,Draw_Wide_Entity_Sprite_Pixels_Only_Row15_Step
56792 EXX Retrieve Y; return if below the play area.
56793 LD A,D
56794 EXX
56795 CP 176
56797 RET NC
56798 CP 16 Return if the entity is above the play area.
56800 RET C
56801 EXX Load the column offset and compute the screen address.
56802 LD A,C
56803 EXX
56804 ADD A,(HL)
56805 LD E,A
56806 INC HL
56807 LD D,(HL)
56808 INC HL
56809 EX DE,HL
56810 LD A,(BC) Toggle the sprite row's three pixel bytes onto the screen.
56811 XOR (HL)
56812 LD (HL),A
56813 INC BC
56814 INC HL
56815 LD A,(BC)
56816 XOR (HL)
56817 LD (HL),A
56818 INC BC
56819 INC HL
56820 LD A,(BC)
56821 XOR (HL)
56822 LD (HL),A
56823 EX DE,HL Restore HL to the row address table pointer.
56824 RET Return.
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