From 74fe4fda2a3059b97d1bfcc03e37be1a19ea82fe Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Sat, 26 Jun 2021 18:19:14 +0000
Subject: Fast mode working and partial text mode.  Plan on attempting a ULA
 emulation.

---
 source/main.c | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 81 insertions(+), 2 deletions(-)

(limited to 'source/main.c')

diff --git a/source/main.c b/source/main.c
index b41efe6..8ea8e00 100644
--- a/source/main.c
+++ b/source/main.c
@@ -69,6 +69,7 @@ static const char *main_menu[]=
 	    "Load Memory Snapshot",
 	    "Save Joypad/Key State",
 	    "Load Joypad/Key State",
+            "Help",
 	    "Exit 3DS81",
 	    "Cancel",
 	    NULL
@@ -84,6 +85,7 @@ typedef enum
     MenuLoadSnapshot,
     MenuSaveMappings,
     MenuLoadMappings,
+    MenuHelp,
     MenuExit
 } MenuOpt;
 
@@ -179,6 +181,80 @@ static void Splash(void)
 }
 
 
+/* ---------------------------------------- HELP
+*/
+static void ShowHelp(void)
+{
+    struct
+    {
+        FB_Colour col;
+        const char *text;
+    }
+    help[] =
+    {
+        {COL_RED, "KEYBOARD"},
+        {COL_BLACK, "Use the touchscreen to press keys on the computer."},
+        {COL_BLACK, "The ZX81 had a keyword entry system, so when the"},
+        {COL_BLACK, "cursor is an inverse K then the keyword printed"},
+        {COL_BLACK, "at the top of the key is displayed.  Therefore"},
+        {COL_BLACK, "to load a tape press the J key, then the SHIFT"},
+        {COL_BLACK, "key (which by default stays pressed until you"},
+        {COL_BLACK, "click it again) and press the P key to enter a"},
+        {COL_BLACK, "quote, press the SHIFT key to stop pressing it,"}, 
+        {COL_BLACK, "type the name of the .P file and close it with"},
+        {COL_BLACK, "another quote, then press ENTER"},
+        {COL_TRANSPARENT, ""},
+        {COL_RED, "LOADING TAPES"},
+        {COL_BLACK, "There are two ways of loading tapes in the"},
+        {COL_BLACK, "simulator.  The first is to put .P files in"},
+        {COL_BLACK, "either the root directory of the SD card"},
+        {COL_BLACK, "or a directory called ZX81SNAP.  Files from"},
+        {COL_BLACK, "either place can be loaded by typing"},
+        {COL_BLACK, "LOAD \"GAME\" to load GAME.P.  Alternatively"},
+        {COL_BLACK, "you can type LOAD \"*\" to display a file"},
+        {COL_BLACK, "selector that allows you to select the tape"},
+        {COL_BLACK, "to load.  LOAD \"\" can be used to load an"},
+        {COL_BLACK, "internal tape image once it has been selected."},
+        {COL_TRANSPARENT, NULL}
+    };
+
+    int done = FALSE;
+    u32 key;
+    Framebuffer upper;
+    Framebuffer lower;
+
+    while(!done)
+    {
+        int f;
+
+        FB_StartFrame(&upper, &lower);
+
+        FB_Clear(&upper, COL_WHITE);
+        FB_Clear(&lower, COL_BLACK);
+
+        for(f = 0; help[f].text; f++)
+        {
+            FB_Print(&upper, help[f].text, 0, upper.height - f * 8,
+                     help[f].col,COL_TRANSPARENT);
+        }
+
+        FB_Print(&lower, "Scroll around help by using the\n"
+                         "control pad\n"
+		         "Press A to finish.",
+                         0, lower.height - 40, COL_YELLOW,COL_TRANSPARENT);
+
+        FB_EndFrame();
+
+        key = hidKeysDown();
+
+        if (key & KEY_A)
+        {
+            done = TRUE;
+        }
+    }
+}
+
+
 /* ---------------------------------------- JOYPAD MAPPING
 */
 static void MapJoypad(void)
@@ -246,7 +322,6 @@ int main(int argc, char *argv[])
     int quit = FALSE;
 
     gfxInit(GSP_RGB565_OES, GSP_RGB565_OES, false);
-    consoleInit(GFX_TOP, NULL);
 
     FB_Init();
 
@@ -289,7 +364,7 @@ int main(int argc, char *argv[])
 
     	Z80Exec(z80);
 
-        ZX81RenderDisplay(&upper);
+        ZX81RenderDisplay(&upper, z80);
 
         FB_EndFrame();
 
@@ -338,6 +413,10 @@ int main(int argc, char *argv[])
 			    	SNAP_Load(z80, NULL, SNAP_TYPE_KEYBOARD);
 			    	break;
 
+                            case MenuHelp:
+                                ShowHelp();
+                                break;
+
                             case MenuExit:
                                 quit = TRUE;
                                 break;
-- 
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