55 lines
698 B
ArmAsm
55 lines
698 B
ArmAsm
#
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! $Source$
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! $State$
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! $Revision$
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! Declare segments (the order is important).
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.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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.sect .text
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! Calls a BDOS routine.
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.define _cpm_bdos
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_cpm_bdos:
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push b
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lda _cpm_a_register
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lhld _cpm_bc_register
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mov b, h
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mov c, l
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lhld _cpm_de_register
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mov d, h
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mov e, l
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lhld _cpm_hl_register
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call 5
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shld _cpm_hl_register
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mov h, d
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mov l, e
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shld _cpm_de_register
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mov h, b
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mov l, c
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shld _cpm_bc_register
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sta _cpm_a_register
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pop b
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ret
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.sect .bss
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.define _cpm_a_register, _cpm_bc_register, _cpm_de_register, _cpm_hl_register
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.comm _cpm_a_register, 1
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.comm _cpm_bc_register, 2
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.comm _cpm_de_register, 2
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.comm _cpm_hl_register, 2
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