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| [9] | 1 | .define __send, __receive, __sendrec
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| 2 |
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| 3 | ! See ../h/com.h for C definitions
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| 4 | SEND = 1
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| 5 | RECEIVE = 2
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| 6 | BOTH = 3
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| 7 | SYSVEC = 32
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| 8 |
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| 9 | !*========================================================================*
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| 10 | ! _send and _receive *
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| 11 | !*========================================================================*
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| 12 | ! _send(), _receive(), _sendrec() all save bp, but destroy ax, bx, and cx.
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| 13 | .extern __send, __receive, __sendrec
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| 14 | __send: mov cx,*SEND ! _send(dest, ptr)
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| 15 | jmp L0
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| 16 |
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| 17 | __receive:
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| 18 | mov cx,*RECEIVE ! _receive(src, ptr)
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| 19 | jmp L0
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| 20 |
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| 21 | __sendrec:
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| 22 | mov cx,*BOTH ! _sendrec(srcdest, ptr)
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| 23 | jmp L0
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| 24 |
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| 25 | L0: push bp ! save bp
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| 26 | mov bp,sp ! can't index off sp
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| 27 | mov ax,4(bp) ! ax = dest-src
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| 28 | mov bx,6(bp) ! bx = message pointer
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| 29 | int SYSVEC ! trap to the kernel
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| 30 | pop bp ! restore bp
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| 31 | ret ! return
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| 32 |
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