typo

recipes/rc2014/selfhost/README.md

@@ -42,14 +42,14 @@ close the binary with a hook word. We're finished with cross-compiling.
 
 We're at the offset that will be `CURRENT` on boot, so we update `LATEST`.
 
-Then, we spit the course code that will be interpreted by stage 1 on boot so
+Then, we spit the source code that will be interpreted by stage 1 on boot so
 that it bootstraps itself to a full interpreter. Not all units are there
 because they don't fit in 8K, but they're sufficient for our needs. We also
 need the linker so that we can relink ourselves to stage 2.
 
 Finally, we have initialization code, then a spit of the ending offset.
 
-Go ahead, run that.  However, one thing you should know is that because the SD
+Go ahead, run that. However, one thing you should know is that because the SD
 card driver is a bit slow, some of these commands take a long time. Multiple
 minutes. Be patient.
 
@@ -77,3 +77,14 @@ You're looking at the offset of the last wordref of the *previous* LOAD
 operation. That offset is going in `XCURRENT`. Then, you're looking at the end
 of that word. That offset goes in `HERE`. Once you've done that, relaunch your
 LOAD.
+
+### Verifying
+
+You can use `/tools/memdump` to dump the memory between your begin/end offsets
+so that you can compare against your reference stage 1. Before you do, you have
+to take yourself out of xcomp mode. First, run `XCOFF` to go back to your
+regular dict. Then, run `FORGET CODE` to undo the xcomp overrides you've added
+before. That will rewind `HERE`. You don't want that. Put `HERE` back to after
+your ending offset so that you don't overwrite your binary.
+
+Then, you can run `/tools/memdump`.

tools/memdump.c

@@ -5,7 +5,7 @@
 
 #include "common.h"
 
-/* Read specified number of bytes at specified memory address through a BASIC
+/* Read specified number of bytes at specified memory address through a Forth
  * remote shell and dump it to stdout.
  */
 
@@ -29,9 +29,7 @@ int main(int argc, char **argv)
 
     int fd = open(argv[1], O_RDWR|O_NOCTTY);
     char s[0x30];
-    sprintf(s, "m=0x%04x", memptr);
-    sendcmdp(fd, s);
-    sprintf(s, "while m<0x%04x peek m:puth a:m=m+1", memptr+bytecount);
+    sprintf(s, ": _ 0x%04x 0x%04x DO I @ .x LOOP ; _", memptr+bytecount, memptr);
     sendcmd(fd, s);
 
     for (int i=0; i<bytecount; i++) {
@@ -41,5 +39,6 @@ int main(int argc, char **argv)
         putchar(c);
     }
     read(fd, s, 2); // read prompt
+    sendcmdp(fd, "FORGET _");
     return 0;
 }