|
Routines |
| Prev: 35140 | Up: Map | Next: 35445 |
| 35388 | LD A,(32957) | Update the game clock at 32957 | ||
| 35391 | SUB 4 | |||
| 35393 | LD (32957),A | |||
| 35396 | CP 252 | Was it just decreased from zero? | ||
| 35398 | JR NZ,35413 | Jump if not | ||
| 35400 | LD A,(32956) | Pick up the value of the remaining air supply from 32956 | ||
| 35403 | CP 36 | Has the air supply run out? | ||
| 35405 | RET Z | Return (with the zero flag set) if so | ||
| 35406 | DEC A | Decrement the air supply at 32956 | ||
| 35407 | LD (32956),A | |||
| 35410 | LD A,(32957) | Pick up the value of the game clock at 32957 | ||
| 35413 | AND 224 | A=INT(A/32); this value specifies how many pixels to draw from left to right in the cell at the right end of the air bar | ||
| 35415 | RLCA | |||
| 35416 | RLCA | |||
| 35417 | RLCA | |||
| 35418 | LD E,0 | Initialise E to 0 (all bits reset) | ||
| 35420 | OR A | Do we need to draw any pixels in the cell at the right end of the air bar? | ||
| 35421 | JR Z,35430 | Jump if not | ||
| 35423 | LD B,A | Copy the number of pixels to draw (1-7) to B | ||
| 35424 | RRC E | Set this many bits in E (from bit 7 towards bit 0) | ||
| 35426 | SET 7,E | |||
| 35428 | DJNZ 35424 | |||
| 35430 | LD A,(32956) | Pick up the value of the remaining air supply from 32956 | ||
| 35433 | LD L,A | Set HL to the display file address at which to draw the top row of pixels in the cell at the right end of the air bar | ||
| 35434 | LD H,82 | |||
| 35436 | LD B,4 | There are four rows of pixels to draw | ||
| 35438 | LD (HL),E | Draw the four rows of pixels at the right end of the air bar | ||
| 35439 | INC H | |||
| 35440 | DJNZ 35438 | |||
| 35442 | XOR A | Reset the zero flag to indicate that there is still some air remaining; these instructions are redundant, since the zero flag is already reset at this point | ||
| 35443 | INC A | |||
| 35444 | RET | |||
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