mirror of https://github.com/pret/pokecrystal.git
49 lines
742 B
NASM
49 lines
742 B
NASM
FarCall_de::
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; Call a:de.
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; Preserves other registers.
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ldh [hTempBank], a
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ldh a, [hROMBank]
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push af
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ldh a, [hTempBank]
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rst Bankswitch
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call FarCall_JumpToDE
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jr ReturnFarCall
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FarCall_JumpToDE:
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push de
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ret
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FarCall_hl::
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; Call a:hl.
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; Preserves other registers.
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ldh [hTempBank], a
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ldh a, [hROMBank]
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push af
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ldh a, [hTempBank]
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rst Bankswitch
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call FarCall_JumpToHL
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; fallthrough
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ReturnFarCall::
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; We want to retain the contents of f.
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; To do this, we can pop to bc instead of af.
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ld a, b
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ld [wFarCallBC], a
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ld a, c
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ld [wFarCallBC + 1], a
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; Restore the working bank.
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pop bc
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ld a, b
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rst Bankswitch
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; Restore the contents of bc.
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ld a, [wFarCallBC]
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ld b, a
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ld a, [wFarCallBC + 1]
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ld c, a
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ret
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FarCall_JumpToHL::
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jp hl
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