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--- vc-3_system_interrupt_table [2026/01/09 12:56] – created appledog
+++ vc-3_system_interrupt_table [2026/01/09 13:00] (current) – appledog
@@ Line 6: / Line 6: @@
 == INT 10h - Video Services
-; ============================================================================
+    ; ============================================================================
-; INT 10h - VIDEO SERVICES
+    ; INT 10h - VIDEO SERVICES
-; Stellar BIOS Video interrupt handler
+    ; Stellar BIOS Video interrupt handler
-; ============================================================================
+    ; ============================================================================
-; Function dispatch via AH register:
+    ; Function dispatch via AH register:
-;   AH=00h: Set video mode
+    ;   AH=00h: Set video mode
-;   AH=01h: Set cursor shape (reserved)
+    ;   AH=01h: Set cursor shape (reserved)
-;   AH=02h: Set cursor position
+    ;   AH=02h: Set cursor position
-;   AH=03h: Get cursor position
+    ;   AH=03h: Get cursor position
-;   AH=0Eh: Write character at cursor (teletype)
+    ;   AH=0Eh: Write character at cursor (teletype)
-;   AH=0Fh: Get current video mode
+    ;   AH=0Fh: Get current video mode
-;   AH=13h: Write string at cursor
+    ;   AH=13h: Write string at cursor
-;   AH=14h: Scroll screen up
+    ;   AH=14h: Scroll screen up
-;   AH=15h: Clear screen
+    ;   AH=15h: Clear screen
-;   AH=16h: Get video parameters (rows, cols)
+    ;   AH=16h: Get video parameters (rows, cols)
-; ============================================================================
+    ; ============================================================================
 === AH=00h: Set video mode
@@ Line 40: / Line 40: @@
 == INT 11h - Keyboard Services
 === AH=00h: Read character (non-blocking)
+* returns character code in AL and keyboard flags in BL.
 === AH=01h: Read character (blocking)
+* returns character code in AL, keyboard flags in BL, and time spent waiting in ms in C
 === AH=02h: Get keyboard flags
-=== AH=03h: Check if key available
+* returns keyboard flags in AL.
+=== AH=03h: Check if key available
+* returns the number of keys waiting in AL. I.E. 0=no keys available, 1+= has keys waiting.
 == INT 12h - String Services