Asynchronous serial interface with the 8251A to achieve two-way machine communication, baud rate 1200bps. Using query mode to send, receive interrupt. Look at the two sides usually the keyboard, waiting for interrupt reception state, and display relevant prompts.

3.asm

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．