From d295be457035b42c4451610c50e520c2fecead54 Mon Sep 17 00:00:00 2001
From: Tianhao Wang <shrik3@riseup.net>
Date: Fri, 24 Mar 2023 15:25:13 +0100
Subject: minimal support for keyctrl, not complete

---
 src/machine/kbd_defs.rs | 78 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 src/machine/kbd_defs.rs

(limited to 'src/machine/kbd_defs.rs')

diff --git a/src/machine/kbd_defs.rs b/src/machine/kbd_defs.rs
new file mode 100644
index 0000000..94026e6
--- /dev/null
+++ b/src/machine/kbd_defs.rs
@@ -0,0 +1,78 @@
+use core::ffi::c_uchar;
+
+// bit masks for modifier keys
+pub enum Mbit {
+    Shift = 0b00000001,
+    AltLeft = 0b00000010,
+    AltRight = 0b00000100,
+    CtrlLeft = 0b00001000,
+    CtrlRight = 0b00010000,
+    CapsLock = 0b00100000,
+    NumLock = 0b01000000,
+    ScrollLock = 0b10000000,
+}
+
+// scan codes of a few specific keys
+pub enum Scan {
+    F1 = 0x3b,
+    Del = 0x53,
+    Up = 72,
+    Down = 80,
+    Left = 75,
+    Right = 77,
+    Div = 8,
+}
+
+// Decoding tables ... this shit is so ugly, thanks to rust's strong typing system!!!
+// Also, this is a german layout keyboard
+// oh btw, the code translation is done by ChatGPT if it's wrong complain to the AI!
+const NORMAL_TAB: [c_uchar; 89] = [
+    0, 0, 49, 50, 51, 52, 53, 54, 55, 56, 57, 48, 225, 39, 8, 0, 113, 119, 101, 114, 116, 122, 117,
+    105, 111, 112, 129, 43, 10, 0, 97, 115, 100, 102, 103, 104, 106, 107, 108, 148, 132, 94, 0, 35,
+    121, 120, 99, 118, 98, 110, 109, 44, 46, 45, 0, 42, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 45, 0, 0, 0, 43, 0, 0, 0, 0, 0, 0, 0, 60, 0, 0,
+];
+
+const SHIFT_TAB: [c_uchar; 89] = [
+    0, 0, 33, 34, 21, 36, 37, 38, 47, 40, 41, 61, 63, 96, 0, 0, 81, 87, 69, 82, 84, 90, 85, 73, 79,
+    80, 154, 42, 0, 0, 65, 83, 68, 70, 71, 72, 74, 75, 76, 153, 142, 248, 0, 39, 89, 88, 67, 86,
+    66, 78, 77, 59, 58, 95, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0,
+];
+
+const ALT_TAB: [c_uchar; 89] = [
+    0, 0, 0, 253, 0, 0, 0, 0, 123, 91, 93, 125, 92, 0, 0,   0, 64, 0,
+    0, 0, 0, 0,   0, 0, 0, 0, 0,   126, 0,   0,   0,    0, 0,   0, 0,   0,
+    0, 0, 0, 0,   0, 0, 0, 0, 0,   0,   0,   0,   0,    0, 230, 0, 0,   0,
+    0, 0, 0, 0,   0, 0, 0, 0, 0,   0,   0,   0,   0,    0, 0,   0, 0,   0,
+    0, 0, 0, 0,   0, 0, 0, 0, 0,   0,   0,   0,   0,    0, 124, 0, 0
+];
+
+const ASC_NUM_TAB: [c_uchar; 13] = [55, 56, 57, 45, 52, 53, 54, 43, 49, 50, 51, 48, 44];
+const SCAN_NUM_TAB: [c_uchar; 13] = [8,  9, 10, 53, 5,  6, 7, 27, 2, 3,  4,  11, 51];
+
+// I think constants are more handy than enum for these...
+// Keyboard controller commands
+pub const KC_CMD_SET_LED: u8 = 0xed;
+pub const KC_CMD_SET_SPEED: u8 = 0xf3;
+
+// CPU reset .. (reboot)
+pub const KC_CPU_RESET: u8 = 0xfe;
+
+// Status register bits
+pub const KC_SR_OUTB: u8 = 0x01;
+pub const KC_SR_INPB: u8 = 0x02;
+pub const KC_SR_AUXB: u8 = 0x20;
+
+// Keyboard Controller LED bits
+pub const KC_LED_CAPS_LOCK: u8 = 4;
+pub const KC_LED_NUM_LOCK: u8 = 2;
+pub const KC_LED_SCROLL_LOCK: u8 = 1;
+
+// ACK
+pub const KC_REPLY_ACK: u8 = 0xfa;
+
+// some stuffs for decoding
+pub const BREAK_BIT: u8 = 0x80;
+pub const PREFIX1: u8 = 0xe0;
+pub const PREFIX2: u8 = 0xe1;
-- 
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