Hello Neo

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= 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)
* 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
* 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
=== 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)