23 lines
421 B
ArmAsm
23 lines
421 B
ArmAsm
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#
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#include "asm.h"
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! Calls a BIOS routine which returns its value in A.
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! a = BIOS offset
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.define call_bios_a
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call_bios_a:
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pop h ! pop return address
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pop d ! pop parameter (possibly junk)
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push d
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push h
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push b ! save FP as we'll corrupt it
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mov b, d ! put parameter in BC
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mov c, e
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call call_bios_raw
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pop b
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mov e, a ! put result in DE
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mvi d, 0
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ret
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