Mednafen per-game override configuration for Layer Section AKA Rayforce AKA Galactic Attack AKA Gunlock for the SEGA Saturn, with custom DualShock 4 mappings for ergonomic in-game controls and save scumming

Layer Section (Japan) (6M).ss.cfg

;;;;;;;;;;;;;;;;;;;
;; == Visuals == ;;
;;;;;;;;;;;;;;;;;;;

; Stretch to fill screen.
; Default: aspect_mult2 - Aspect Preserve + Integer Multiple-of-2 Scale
; aspect_int - Aspect Preserve + Integer Scale: Full-screen stretch, same as "aspect" except that the equivalent xscalefs and yscalefs are rounded down to the nearest integer.
ss.stretch aspect_int

;Enable scanlines with specified opacity. (0 makes them invisible)
ss.scanlines 0

;Taste the pixel art
; ss.special nn3x
ss.shader autoipsharper


;;;;;;;;;;;;;;;;;
;; == Input == ;;
;;;;;;;;;;;;;;;;;

; Analog axis binary press detection threshold.
; Threshold for detecting a digital-like "button" press on analog axis, in percent.
; 0 through 100, default = 75
; NOTE: This doesn't seem to change anything, so I'll have to resort to finding a [SCALE] value for abs_[01][-+] below
input.joystick.axis_threshold 10

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; === DualShock 4 controls === ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; My DS4's ID: 0x05c4054c000000000000504944564944
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; button_0  -->  □
; button_1  -->  x
; button_2  -->  ○
; button_3  -->  △
; button_4  -->  [L1]
; button_5  -->  [R1]
; button_6  -->  \L2/
; button_7  -->  \R2/
; button_8  -->  SHARE
; button_9  -->  OPTIONS
; button_10 -->  (L3)
; button_11 -->  (R3)
; button_12 -->  PS button
; button_13 -->  touchpad
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; abs_0-  -->  left stick ←
; abs_0+  -->  left stick →
; abs_1-  -->  left stick ↑
; abs_1+  -->  left stick ↓
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; abs_2-  -->  right stick ←
; abs_2+  -->  right stick →
; abs_5-  -->  right stick ↑
; abs_5+  -->  right stick ↓
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; abs_6-  -->  d-pad ←
; abs_6+  -->  d-pad →
; abs_7-  -->  d-pad ↑
; abs_7+  -->  d-pad ↓
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;


;ss, Virtual Port 1, Digital Gamepad: A  -- SHOOT --  PlayStation SQUARE □ or R2
ss.input.port1.gamepad.a joystick 0x05c4054c000000000000504944564944 button_0 || joystick 0x05c4054c000000000000504944564944 button_7

;ss, Virtual Port 1, Digital Gamepad: B  -- LASER --  PlayStation CROSS x or CIRCLE ○ or TRIANGLE △ or R1 or L1 or L2
; joystick 0x05c4054c000000000000504944564944 abs_4-
ss.input.port1.gamepad.b joystick 0x05c4054c000000000000504944564944 button_1 || joystick 0x05c4054c000000000000504944564944 button_2 || joystick 0x05c4054c000000000000504944564944 button_3 || joystick 0x05c4054c000000000000504944564944 button_5 || joystick 0x05c4054c000000000000504944564944 button_4 || joystick 0x05c4054c000000000000504944564944 button_6

; [8 CREDITS CHEAT] Make my DS4's touchpad press L R Left C START simultaneously
ss.input.port1.gamepad.ls joystick 0x05c4054c000000000000504944564944 button_13
ss.input.port1.gamepad.rs joystick 0x05c4054c000000000000504944564944 button_13
ss.input.port1.gamepad.c  joystick 0x05c4054c000000000000504944564944 button_13

; -------------------------  "joystick"  DEVICE_ID  DEVICE_INPUT  [SCALE]  [LOGIC]  [...]
; [SCALE] is a 4.12 fixed point number (4 bits for the integer part, 12 bits for the fractional part)
; written as an unsigned 16-bit integer (`u16` in Rust) in this configuration file (0-65535, with 1 corresponding to ~0.0244%)
; Useful values
;   0.50 --> 0000.1000 0000 0000 --> 2048
;   1.00 --> 0001.0000 0000 0000 --> 4096 (default)
;   2.00 --> 0010.0000 0000 0000 --> 8192
;   2.50 --> 0010.1000 0000 0000 --> 10240 (what I'm using below right now)
;   4.00 --> 0100.0000 0000 0000 --> 16384
;   8.00 --> 1000.0000 0000 0000 --> 32768
; Tip: Look for a "Programmer" mode with a bit toggling keypad in your desktop's Calculator app (if it has any)

;ss, Virtual Port 1, Digital Gamepad: UP ↑
ss.input.port1.gamepad.up    joystick 0x05c4054c000000000000504944564944 abs_1- 10240 || joystick 0x05c4054c000000000000504944564944 abs_7-

;ss, Virtual Port 1, Digital Gamepad: DOWN ↓
ss.input.port1.gamepad.down  joystick 0x05c4054c000000000000504944564944 abs_1+ 10240 || joystick 0x05c4054c000000000000504944564944 abs_7+

;ss, Virtual Port 1, Digital Gamepad: LEFT ←  (also used for 8 credits cheat)
ss.input.port1.gamepad.left  joystick 0x05c4054c000000000000504944564944 abs_0- 10240 || joystick 0x05c4054c000000000000504944564944 abs_6- || joystick 0x05c4054c000000000000504944564944 button_13

;ss, Virtual Port 1, Digital Gamepad: RIGHT →
ss.input.port1.gamepad.right joystick 0x05c4054c000000000000504944564944 abs_0+ 10240 || joystick 0x05c4054c000000000000504944564944 abs_6+

;ss, Virtual Port 1, Digital Gamepad: START   (also used for 8 credits cheat)
ss.input.port1.gamepad.start joystick 0x05c4054c000000000000504944564944 button_9 || joystick 0x05c4054c000000000000504944564944 button_13

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; === Command bindings to DS4 === ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;Advance frame
command.advance_frame keyboard 0x0 4+alt

;Return to normal mode after advancing frames
command.run_normal keyboard 0x0 21+alt


;Insert coin
command.insert_coin keyboard 0x0 65

;Pause/Unpause
command.pause keyboard 0x0 72

;Reset
command.reset keyboard 0x0 67


;Save state        F5                 PS button + [R1]
command.save_state keyboard 0x0 62 || joystick 0x05c4054c000000000000504944564944 button_12 && joystick 0x05c4054c000000000000504944564944 button_5

;Load state        F7                 PS button + [L1]
command.load_state keyboard 0x0 64 || joystick 0x05c4054c000000000000504944564944 button_12 && joystick 0x05c4054c000000000000504944564944 button_4

;Decrease selected save state slot by 1   PS button + d-pad left
command.state_slot_dec keyboard 0x0 45 || joystick 0x05c4054c000000000000504944564944 button_12 && joystick 0x05c4054c000000000000504944564944 abs_6-

;Increase selected save state slot by 1   PS button + d-pad right
command.state_slot_inc keyboard 0x0 46 || joystick 0x05c4054c000000000000504944564944 button_12 && joystick 0x05c4054c000000000000504944564944 abs_6+


;Take scaled(and filtered) screen snapshot
command.take_scaled_snapshot keyboard 0x0 66+shift || joystick 0x05c4054c000000000000504944564944 button_8 &! joystick 0x05c4054c000000000000504944564944 button_12

;Take screen snapshot
command.take_snapshot keyboard 0x0 66 || joystick 0x05c4054c000000000000504944564944 button_12 && joystick 0x05c4054c000000000000504944564944 button_8


;Rotate screen        Alt+O                  PS button + ○
command.rotate_screen keyboard 0x0 18+alt || joystick 0x05c4054c000000000000504944564944 button_12 && joystick 0x05c4054c000000000000504944564944 button_2

;Toggle state rewind functionality       Alt+S     PS button + △
command.toggle_state_rewind keyboard 0x0 22+alt || joystick 0x05c4054c000000000000504944564944 button_12 && joystick 0x05c4054c000000000000504944564944 button_3


;Rewind              Backspace          PS button + [L2]                                                                                                 right stick ←
command.state_rewind keyboard 0x0 42 || joystick 0x05c4054c000000000000504944564944 button_12 && joystick 0x05c4054c000000000000504944564944 button_6 || joystick 0x05c4054c000000000000504944564944 abs_2-

;Fast-forward        `                  PS button + [R2]                                                                                                 right stick →
command.fast_forward keyboard 0x0 53 || joystick 0x05c4054c000000000000504944564944 button_12 && joystick 0x05c4054c000000000000504944564944 button_7 || joystick 0x05c4054c000000000000504944564944 abs_2+

;Slow-forward        \                  right stick ↓
command.slow_forward keyboard 0x0 49 || joystick 0x05c4054c000000000000504944564944 abs_5+

mednafen-cfg.sublime-syntax

%YAML 1.2
---
# See http://www.sublimetext.com/docs/3/syntax.html
name: Mednafen configuration
version: 2
file_extensions:
  - cfg
scope: source.mednafen-cfg

variables:
  systems: apple2|lynx|cdplay|gb|gba|ngp|nes|pce|pce_fast|pcfx|sasplay|gg|md|sms|ss|ssfplay|psx|snes|snes_faust|vb|wswan
  DEVICE_TYPE: '\b(?:3dpad|dmission|gamepad|gun|gun_chairs|joystick|jpkeyboard|keyboard|mission|mouse|wheel)\b'
  DEVICE_ID: '\b0x[0-9a-fA-F]+\b'
  input_buttons: '\bbutton_\d+|\babs_\d+[-+]{,2}g?|\b(?:a|b|c|x|y|z|ls|rs|up|down|left|right|start)\b'
  input_keys: '\b\d+(?:\+(?:ctrl|alt|shift))*\b'
  input_mouse: '(?:cursor|rel)_(?:x|y)(?:-|+|-+|+-)|button_(?:left|middle|right|x1|x2|\d{1,2})'
  DEVICE_INPUT: '{{input_buttons}}|{{input_keys}}|{{input_mouse}}'

contexts:
  # The prototype context is prepended to all contexts but those setting
  # meta_include_prototype: false.
  prototype:
    - include: comments

  main:
    # The main context is the initial starting point of our syntax.
    # Include other contexts from here (or specify them directly).
    - include: mapping

  mapping:
    - match: ^(?=\S)
      push:
        - key-meta
        - key-identifier

  key-meta:
    - meta_scope: meta.mapping.key.mednafen-cfg  # meta.path.mednafen-cfg
    - match: ''
      set: separator

  key-identifier:
    - meta_scope: entity.name.class.mednafen-cfg
    - match: '{{systems}}'
      scope: entity.name.namespace.mednafen-cfg
    - match: '{{DEVICE_INPUT}}'
      scope: entity.name.constant.mednafen-cfg
    - match: '[^\s.]+'
      scope: entity.name.type.mednafen-cfg
    - match: \.
      scope: punctuation.separator.namespace.mednafen-cfg
    - match: (?=\s)
      pop: true

  separator:
    - meta_scope: meta.mapping.mednafen-cfg
    - match: \s+
      scope: punctuation.separator.key-value.mednafen-cfg
    - match: ''
      set: value

  value:
    - meta_scope: meta.mapping.value.mednafen-cfg
    - include: button-names
    - include: logic
    - include: numbers
    - include: bare-string
    - match: '$\n'
      pop: true

  button-names:
    - match: '({{DEVICE_TYPE}}\s+{{DEVICE_ID}})\s+({{DEVICE_INPUT}})'
      captures:
        1: variable.other.constant.mednafen-cfg
        2: entity.name.constant.mednafen-cfg

  logic:
    - match: '(\|\||&&|&!)'
      scope: keyword.operator.logical.js

  numbers:
    - match: '\b(-)?[0-9.]+\b'
      scope: constant.numeric.mednafen-cfg

  bare-string:
    - match: \S+
      scope: string.unquoted.mednafen-cfg



  comments:
    # Comments begin with a ';' and finish at the end of the line.
    - match: ';'
      scope: punctuation.definition.comment.mednafen-cfg
      push:
        # This is an anonymous context push for brevity.
        - meta_scope: comment.line.semi-colon.mednafen-cfg
        - match: '((={2,})\s+(.*)\s+(\2))'
          captures:
            1: meta.toc-list.mednafen-cfg
            2: punctuation.definition.heading.begin.mednafen-cfg
            3: markup.heading
            4: punctuation.definition.heading.end.mednafen-cfg
        - match: $\n?
          pop: true