Interrupt system implemented, some new programs.

2026-08-15 00:44:13 -04:00
parent 638b68b25c
commit 6d1966d500
79 changed files with 2778 additions and 88 deletions
@@ -0,0 +1,44 @@
+; Tests a hardware interrupt delivered to a handler named in the Vector Segment.
+;
+; A device is named by the port it is plugged into, because that is what decides which
+; vector it arrives through. The test device on port 0x10 puts its line up when anything
+; is written to it.
+;
+; The device is asked for attention while the Interrupt Flag is down, so the line waits.
+; SIF lets it through, and the handler runs before the next instruction does.
+;
+; Correct output is:
+;   O         printed with the line up and the flag down
+;   K         printed by the handler
+;   !         printed after RETI came back
+
+#Program
+
+start:
+  CIF               ; Hold devices off.
+  INIA 0d1
+  OUTA 0x10         ; The device asks. Its line goes up and stays up.
+
+  INIA 0d79         ; 'O'
+  OUTA 0x00
+  INIA 0x0A
+  OUTA 0x00
+
+  SIF               ; Let it through. It is answered on the very next step.
+
+  INIA 0d33         ; '!'. Reached only because RETI came back here.
+  OUTA 0x00
+  INIA 0x0A
+  OUTA 0x00
+  HALT
+
+deviceHandler:
+  INIA 0d75         ; 'K'
+  OUTA 0x00
+  INIA 0x0A
+  OUTA 0x00
+  RETI
+
+#Vectors
+
+  Device 0x10  deviceHandler