Add basic controller pad test (prints button presses to console)

Makefile

@@ -1,6 +1,7 @@
 TOPTARGETS = build clean
 
 IMAGES = common \
+		input/pad \
 		cdrom/disc-swap \
 		cdrom/getloc \
 		cdrom/timing \

input/pad/Makefile

@@ -0,0 +1,4 @@
+TARGET = pad.elf
+#CFLAGS = -g -msoft-float -O2 -D__PLAYSTATION__ -fno-builtin -fdata-sections -ffunction-sections -Wall -Wextra -Wno-strict-aliasing -Wno-sign-compare
+
+include ../../common-test.mk

input/pad/main.cpp

@@ -0,0 +1,99 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <psxapi.h>
+#include <psxgpu.h>
+#include <psxetc.h>
+#include <psxpad.h>
+#include <io.h>
+
+#define SCR_W 320
+#define SCR_H 240
+
+static DISPENV disp;
+static DRAWENV draw;
+
+static char padBuffer[2][34];
+static unsigned short buttons = 0xffff, prevButtons = 0xffff;
+
+static bool BUTTON(uint16_t button)
+{
+    return (buttons & button) == 0 && ((prevButtons & button) != 0);
+}
+
+static void ButtonUpdate(void)
+{
+    prevButtons = buttons;
+    buttons = ((PADTYPE*)padBuffer[0])->btn;
+}
+
+int main()
+{
+    printf("PAD test (PAD1)\n");
+
+    ResetGraph(0);
+    SetDefDispEnv(&disp, 0, 0, SCR_W, SCR_H);
+    SetDefDrawEnv(&draw, 0, 0, SCR_W, SCR_H);
+
+    PutDispEnv(&disp);
+    PutDrawEnv(&draw);
+    SetDispMask(1);
+
+    InitPAD(padBuffer[0], 34, padBuffer[1], 34);
+    StartPAD();
+    ChangeClearPAD(0);
+
+    while (1)
+    {
+        if (BUTTON(PAD_UP)) {
+            printf("PAD_UP\n");
+        }
+        if (BUTTON(PAD_DOWN)) {
+            printf("PAD_DOWN\n");
+        }
+        if (BUTTON(PAD_LEFT)) {
+            printf("PAD_LEFT\n");
+        }
+        if (BUTTON(PAD_RIGHT)) {
+            printf("PAD_RIGHT\n");
+        }
+        if (BUTTON(PAD_SQUARE)) {
+            printf("PAD_SQUARE\n");
+        }
+        if (BUTTON(PAD_TRIANGLE)) {
+            printf("PAD_TRIANGLE\n");
+        }
+        if (BUTTON(PAD_CROSS)) {
+            printf("PAD_X\n");
+        }
+        if (BUTTON(PAD_CIRCLE)) {
+            printf("PAD_CIRCLE\n");
+        }
+        if (BUTTON(PAD_SELECT)) {
+            printf("PAD_SEL\n");
+        }
+        if (BUTTON(PAD_START)) {
+            printf("PAD_START\n");
+        }
+        if (BUTTON(PAD_L3)) {
+            printf("PAD_L3\n");
+        }
+        if (BUTTON(PAD_R3)) {
+            printf("PAD_R3\n");
+        }
+        if (BUTTON(PAD_L2)) {
+            printf("PAD_L2\n");
+        }
+        if (BUTTON(PAD_R2)) {
+            printf("PAD_R2\n");
+        }
+        if (BUTTON(PAD_L1)) {
+            printf("PAD_L1\n");
+        }
+        if (BUTTON(PAD_R1)) {
+            printf("PAD_R1\n");
+        }
+        VSync(0);
+        ButtonUpdate();
+    }
+    return 0;
+}