43 lines
537 B
Z80 Assembly
43 lines
537 B
Z80 Assembly
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.global syscall
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syscall:
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push af
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push ix
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sla a
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ld ix, syscall_table
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add a, ixl
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ld ixl, a
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ld a, (ix+0)
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ld (syscall_jump+1), a
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ld a, (ix+1)
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ld (syscall_jump+2), a
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pop ix
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pop af
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syscall_jump: jp 0x0
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print:
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ld a, (hl)
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cp 0
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ret z
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ld bc, 0x200
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out (c), a
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inc hl
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jp print
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gff:
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.align 8
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syscall_table:
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.dc.w print ; 0
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.dc.w get_free_frame ; 1
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.dc.w set_frame ; 2
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.dc.w new_process ; 3
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.dc.w yield ; 4
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.dc.w mb_send ; 5
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.dc.w mb_read ; 6
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.dc.w get_free_mailbox ; 7
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.dc.w proc_map_set ; 8
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.dc.w proc_map_load ; 9
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.dc.w find_first_card ; 10
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