Difference between revisions of "68k:Ports:60000D"

Revision as of 23:12, 4 November 2006

Link status (interrupt reason)

According to 68k:Documents:J89hw.txt you have to read 60000C to begin acknowledging a link interrupt. Other documents don't seem to mention this though.

• Bit 7: Error (write 0xE0 then 0x8D to 60000C to acknowledge)
• Bit 6: Transmit buffer empty (write another byte or clear 60000C:1 to acknowledge)
• Bit 5: Received byte (read the byte to acknowledge)
• Bit 4: Interrupt pending (Always 1 in interrupt handler)
• Bit 3: Autostart
• Bit 2: (?) External activity
• Bit 1: (?)
• Bit 0: (?)