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simple assembler help for newbie
- Thread starter sliver99
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SimonSellick
Programmer
If this is an 8251 or something like it, there is an RXRDY bit in the status port that becomes 1 when there is a character ready to read in the data port. You can read the status port and AND it with a mask that just leaves the interesting (RXRDY) bit intact. The z flag will then tell you if there is data ready in the data port. When you read the data port, the RXRDY flag will be reset by the USART.
HTH
HTH
)
SimonSellick
Programmer
Oh well, at least the archive read refreshed my dynamic and increasingly random memory.
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