Pin windows and linux memory layout, document baud rate.

ueforth/Makefile

@@ -26,8 +26,10 @@ CFLAGS_MINIMIZE = \
                 -ffunction-sections -fdata-sections \
                 -fmerge-all-constants
 CFLAGS = $(CFLAGS_COMMON) \
+         $(CFLAGS_MINIMIZE) \
          -Wall \
          -Werror \
+         -no-pie \
          -Wl,--gc-sections
 STRIP_ARGS = -S \
              --strip-unneeded \

ueforth/posix/posix_main.c

@@ -18,7 +18,9 @@
 #include "gen/posix_boot.h"
 
 int main(int argc, char *argv[]) {
-  void *heap = mmap(0, HEAP_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+  void *heap = mmap(
+      (void *) 0x8000000, HEAP_SIZE,
+      PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
   forth_init(argc, argv, heap, boot, sizeof(boot));
   for (;;) { g_sys.rp = forth_run(g_sys.rp); }
   return 1;

ueforth/site/ESP32forth.html

@@ -66,6 +66,13 @@ Choose these options under Tools.
 </ul>
 </p>
 
+<h2>Use</h2>
+<p>
+Initially ESP32forth can be interacted with over a serial port (over USB).
+You can do this from the Arduino IDE's Serial Monitor option.
+Be sure to config the serial port to: <code>baud rate = 115200, data bits = 8, stop bits = 1, and parity = N</code>.
+</p>
+
 <h2>ESP32forth Features</h2>
 
 <h3>ESP32forth Specific Words</h3>

ueforth/windows/windows_main.c

@@ -38,7 +38,8 @@ int WINAPI WinMainCRTStartup(void) {
 int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmd, int show) {
 #endif
   void *heap = VirtualAlloc(
-      NULL, HEAP_SIZE, MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);
+      (void *) 0x8000000, HEAP_SIZE,
+      MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);
   forth_init(0, 0, heap, boot, sizeof(boot));
   for (;;) { g_sys.rp = forth_run(g_sys.rp); }
 }