From 71d13501431fcd27e983c1e5624144f5924e08ec Mon Sep 17 00:00:00 2001
From: Virgil Dupras <hsoft@hardcoded.net>
Date: Tue, 7 Apr 2020 13:37:52 -0400
Subject: [PATCH] emul/hw/rc2014: add memdump command

Why didn't I think of adding it before?
---
 emul/hw/rc2014/README.md | 4 ++++
 emul/hw/rc2014/classic.c | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/emul/hw/rc2014/README.md b/emul/hw/rc2014/README.md
index 2cef11f..d4ac64b 100644
--- a/emul/hw/rc2014/README.md
+++ b/emul/hw/rc2014/README.md
@@ -9,3 +9,7 @@ Run `make` to build.
 
 Run `./classic /path/to/rom` (for example, `os.bin` from RC2014's recipe).
 Serial I/O is hooked to stdin/stdout. `CTRL+D` to quit.
+
+## Memory dump
+
+You can press `CTRL+E` to dump the whole 64K of memory into `memdump`.
diff --git a/emul/hw/rc2014/classic.c b/emul/hw/rc2014/classic.c
index 1f58e49..561c259 100644
--- a/emul/hw/rc2014/classic.c
+++ b/emul/hw/rc2014/classic.c
@@ -101,6 +101,13 @@ int main(int argc, char *argv[])
         if (!tosend) {
             char c;
             if (read(fileno(stdin), &c, 1) == 1) {
+                if (c == 5) {
+                    fprintf(stderr, "Dumping memory to memdump\n");
+                    FILE *fp = fopen("memdump", "w");
+                    fwrite(m->mem, 0x10000, 1, fp);
+                    fclose(fp);
+                    c = 0; // don't send to RC2014
+                }
                 if (c == 4) {   // CTRL+D
                     // Stop here
                     break;