From 5cec7afd1fb261e9242e7817b7a9860ef2feab21 Mon Sep 17 00:00:00 2001
From: sanni <sanni@users.noreply.github.com>
Date: Tue, 17 Mar 2020 14:09:47 +0100
Subject: [PATCH] V4.6: Increase SA1 compatibility

---
 Cart_Reader/Cart_Reader.ino |  8 ++++----
 Cart_Reader/SNES.ino        | 20 ++++++++++++++++++++
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/Cart_Reader/Cart_Reader.ino b/Cart_Reader/Cart_Reader.ino
index 52c2c8b..ffd3353 100644
--- a/Cart_Reader/Cart_Reader.ino
+++ b/Cart_Reader/Cart_Reader.ino
@@ -2,15 +2,15 @@
                     Cartridge Reader for Arduino Mega2560
 
    Author:           sanni
-   Date:             03.03.2020
-   Version:          4.5
+   Date:             17.03.2020
+   Version:          4.6
 
    SD  lib:         https://github.com/greiman/SdFat
    LCD lib:         https://github.com/adafruit/Adafruit_SSD1306
    Clockgen:        https://github.com/etherkit/Si5351Arduino
    RGB Tools lib:   https://github.com/joushx/Arduino-RGB-Tools
 
-   Compiled with Arduino 1.8.10
+   Compiled with Arduino 1.8.12
 
    Thanks to:
    MichlK - ROM-Reader for Super Nintendo
@@ -43,7 +43,7 @@
 **********************************************************************************/
 #include <SdFat.h>
 
-char ver[5] = "4.5";
+char ver[5] = "4.6";
 
 /******************************************
    Options
diff --git a/Cart_Reader/SNES.ino b/Cart_Reader/SNES.ino
index 2a665bb..ad73d52 100644
--- a/Cart_Reader/SNES.ino
+++ b/Cart_Reader/SNES.ino
@@ -547,6 +547,26 @@ void readHiRomBanks( unsigned int start, unsigned int total, SdFile *file)
 void getCartInfo_SNES() {
   boolean manualConfig = 0;
 
+  //Prime SA1 cartridge
+  uint16_t c = 0;
+  uint16_t currByte = 0;
+  byte buffer[1024] = { 0 };
+  PORTL = 192;
+  while (c < 1024) {
+    PORTF = (currByte & 0xFF);
+    PORTK = ((currByte >> 8) & 0xFF);
+
+    // Wait for the Byte to appear on the data bus
+    // Arduino running at 16Mhz -> one nop = 62.5ns
+    // slowRom is good for 200ns, fastRom is <= 120ns; S-CPU best case read speed: 3.57MHz / 280ns
+    // let's be conservative and use 6 x 62.5 = 375ns
+    NOP; NOP; NOP; NOP; NOP; NOP;
+
+    buffer[c] = PINC;
+    c++;
+    currByte++;
+  }
+
   // Print start page
   if (checkcart_SNES() == 0) {
     // Checksum either corrupt or 0000