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Routines |
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Called from the main loop at 25129.
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27022 | LD A,251 | Read keys Q-W-E-R-T. | ||||||
27024 | IN A,(254) | |||||||
27026 | AND 16 | Keep only bit 4 (corresponding to 'T'). | ||||||
27028 | LD HL,31850 | Pick up the last recorded 'T' pressed indicator. | ||||||
27031 | CP (HL) | Does the current value match? | ||||||
27032 | RET Z | Return if so. | ||||||
27033 | LD (HL),A | Save the current 'T' pressed indicator. | ||||||
27034 | AND A | Is 'T' being pressed? | ||||||
27035 | RET NZ | Return if not. | ||||||
27036 | LD HL,31849 | Toggle the sound on/off indicator by flipping bits 3 and 4. | ||||||
27039 | LD A,(HL) | |||||||
27040 | XOR 24 | |||||||
27042 | LD (HL),A | |||||||
27043 | RET |
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