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acia: protect DE during aciaInt
I don't know why I haven't noticed it wasn't protected. It must have been behind many random problems I've been having...
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@ -77,17 +77,19 @@ aciaInt:
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cp l
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cp l
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jr z, .end ; Equal? buffer is full
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jr z, .end ; Equal? buffer is full
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; Alrighty, buffer not full. let's write.
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push de ; <|
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ld de, ACIA_BUF
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; Alrighty, buffer not full|. let's write.
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; A already contains our write index, add it to DE
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ld de, ACIA_BUF ; |
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call addDE
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; A already contains our wr|ite index, add it to DE
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; increase our buf ptr while we still have it in A
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call addDE ; |
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call aciaIncIndex
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; increase our buf ptr whil|e we still have it in A
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ld (ACIA_BUFWRIDX), a
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call aciaIncIndex ; |
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ld (ACIA_BUFWRIDX), a ;
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; And finally, fetch the value and write it.
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; |
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in a, (ACIA_IO)
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; And finally, fetch the va|lue and write it.
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ld (de), a
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in a, (ACIA_IO) ; |
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ld (de), a ; |
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pop de ; <|
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.end:
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.end:
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pop hl
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pop hl
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