From 002caab79120ee69ec6fd28b8a2b416496d7d252 Mon Sep 17 00:00:00 2001
From: "Morgan 'ARR\\!' Allen" <morganrallen@gmail.com>
Date: Sat, 18 Jan 2020 11:46:33 -0800
Subject: [PATCH] but will anyone....

---
 README.md                                 |  5 ++
 arduino-bin-loader/arduino-bin-loader.ino | 64 +++++++++++++++++++++++
 2 files changed, 69 insertions(+)
 create mode 100644 README.md
 create mode 100644 arduino-bin-loader/arduino-bin-loader.ino

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d1e85d7
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# 6502-hacking
+
+> HACKING <
+
+
diff --git a/arduino-bin-loader/arduino-bin-loader.ino b/arduino-bin-loader/arduino-bin-loader.ino
new file mode 100644
index 0000000..69cf5ba
--- /dev/null
+++ b/arduino-bin-loader/arduino-bin-loader.ino
@@ -0,0 +1,64 @@
+#define ROM_SIZE  (0xffff)
+#define SER_BUF   (1024)
+
+#define SIG_RESET ('r')
+#define SIG_WRITE ('w')
+
+enum states {
+  IDLE,
+  WRITE // write rom to memory
+};
+
+void do_reset() {
+  SCB->AIRCR = 0x05fa0004;
+}
+
+enum states state = IDLE;
+volatile static uint8_t rom[ROM_SIZE];
+uint8_t buf[SER_BUF];
+uint16_t rom_idx = 0;
+uint32_t start = 0;
+
+void setup() {
+  bzero(&buf, SER_BUF);
+  bzero((void*)&rom, ROM_SIZE);
+
+  Serial.begin(115200);
+
+  start = millis();
+  state = IDLE;
+
+  Serial.println("READY");
+}
+
+void flush_serial() {
+  while(Serial.available() > 0) Serial.read();
+}
+
+void loop() {
+  if(state == IDLE) {
+    char c = Serial.read();
+
+    if(c == SIG_RESET) {
+      Serial.println("resetting");
+      delay(1000);
+      do_reset();
+    } else if(c == SIG_WRITE) {
+      state = WRITE;
+      rom_idx = 0;
+
+      bzero((void*)&rom, ROM_SIZE);
+
+      start = millis();
+
+      Serial.println("Ready for ROM");
+    }
+  } else if(state == WRITE) {
+    while(true && rom_idx < 0x7ffe && millis() - start < 3000) {
+      while(Serial.available()) rom[rom_idx++] = Serial.read();
+    }
+
+    state = IDLE;
+    Serial.printf("Read 0x%04X bytes into memory\r\n", rom_idx);
+  }
+}