Add basic UART driver

This didn't have a chance to get tested so I hope it works. There is not fancy stuff here, just write to the register and wait till it is done.
2022-03-14 00:24:08 -05:00
parent b48438f6b2
commit 0b5ccf48b8
3 changed files with 46 additions and 1 deletions
--- a/sw/io.inc65
+++ b/sw/io.inc65
@@ -1 +1,6 @@
-SEVEN_SEG  = $7ff0
+SEVEN_SEG   = $7ff0
+
+UART        = $7ff4
+UART_TXB    = UART
+UART_RXB    = UART
+UART_STATUS = UART + 1