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--- vc-3_system_interrupt_table [2026/01/09 12:56] – created appledog
+++ vc-3_system_interrupt_table [Unknown date] (current) – removed - external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
-= VC-3 System Interrupt Table
-The VC-3 is a system, running on the SD-8516.
-== Introduction
-I guess this interrupt system is part of the KERNAL, so should be more "VC-3" as it is system software. What follows is a simple list of the interrupt, what it does, it's calling parameters and it's return codes. I guess this should be called "Stellar BIOS V1".
-== INT 10h - Video Services
-; ============================================================================
-; INT 10h - VIDEO SERVICES
-; Stellar BIOS Video interrupt handler
-; ============================================================================
-; Function dispatch via AH register:
-;   AH=00h: Set video mode
-;   AH=01h: Set cursor shape (reserved)
-;   AH=02h: Set cursor position
-;   AH=03h: Get cursor position
-;   AH=0Eh: Write character at cursor (teletype)
-;   AH=0Fh: Get current video mode
-;   AH=13h: Write string at cursor
-;   AH=14h: Scroll screen up
-;   AH=15h: Clear screen
-;   AH=16h: Get video parameters (rows, cols)
-; ============================================================================
-=== AH=00h: Set video mode
-* Returns: AL is 00 on success, 01 if the mode failed to init.
-Available modes:
-* Mode 0: 22x23 console
-* Mode 1: 40x25 console
-* Mode 2: 80x25 console
-* Mode 3: still thinking, graphics, or superterminal? 1280x800 "128x40"font via 10x20 charset??
-=== AH=01h: Set cursor shape
-=== AH=02h: Set cursor position
-=== AH=03h: Get cursor position
-=== AH=0Eh: Write character (teletype)
-=== AH=13h: Write string
-== INT 11h - Keyboard Services
-=== AH=00h: Read character (non-blocking)
-=== AH=01h: Read character (blocking)
-=== AH=02h: Get keyboard flags
-=== AH=03h: Check if key available
-== INT 12h - String Services
-=== AH=00h: strlen
-=== AH=01h: strcpy
-=== AH=02h: strcmp
-=== AH=03h: strcat
-=== AH=04h: atoi
-=== AH=05h: itoa
-== INT 13h - Math Services
-=== AH=00h: Multiply 16-bit
-=== AH=01h: Divide 16-bit
-=== AH=02h: Random number
-=== AH=03h: Absolute value
-== INT 14h - Memory Services
-=== AH=00h: memcpy
-=== AH=01h: memset
-=== AH=02h: memcmp
-== INT 15h - File/Storage (future)