File format to output SIMH deposit commands.

"dump -Osimh" will convert an input file to a series of SIMH deposit
commands.  If there is a start address, there will also be a GO
command at the end.

Author: larsbrinkhoff

Makefile

@@ -4,7 +4,7 @@ CFLAGS = -g -W -Wall -Ilibword
 FILES =  sblk-file.o pdump-file.o dmp-file.o raw-file.o exe-file.o \
 	 mdl-file.o rim10-file.o fasl-file.o palx-file.o lda-file.o \
 	 cross-file.o hex-file.o atari-file.o iml-file.o exb-file.o \
-	 tenex-file.o csave-file.o hiseg-file.o
+	 tenex-file.o csave-file.o hiseg-file.o simh-file.o
 
 LIBWORD = libword/libword.a
 

README.md

@@ -57,6 +57,7 @@ Most tools that work with executable programs support these formats:
 - TOPS-10 highseg sharable .SHR and nonsharable .HGH format.
 - TOPS-20 and TOPS-10 sharable save .EXE files.
 - TENEX sharable save .SAV files.
+- SIMH deposit commands; output only.
 
 In addition, some mini and micro computer program formats are supported:
 

dis.h

@@ -69,6 +69,7 @@ extern struct file_format raw_file_format;
 extern struct file_format rim10_file_format;
 extern struct file_format sblk_file_format;
 extern struct file_format shr_file_format;
+extern struct file_format simh_file_format;
 extern struct file_format tenex_file_format;
 
 extern void     usage_file_format (void);

file.c

@@ -43,6 +43,7 @@ static struct file_format *file_formats[] = {
   &rim10_file_format,
   &sblk_file_format,
   &shr_file_format,
+  &simh_file_format,
   &tenex_file_format,
   NULL
 };

simh-file.c

@@ -0,0 +1,64 @@
+/* Copyright (C) 2024 Lars Brinkhoff <[email protected]>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/*
+  File format to output SIMH deposit commands.
+
+  Converts a core image to file to a series of SIMH deposit commands.
+  If there is a start address, there will also be a GO command at the end.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "dis.h"
+#include "memory.h"
+
+static void
+write_location (FILE *f, struct pdp10_memory *memory, int address)
+{
+  word_t data = get_word_at (memory, address);
+  if (data >= 0)
+    {
+      data &= 0777777777777LL;
+      fprintf (f, "d %06o %012llo\n", address, data);
+    }
+}
+
+static void
+write_simh (FILE *f, struct pdp10_memory *memory)
+{
+  int i;
+
+  /* Memory contents, as deposit commands. */
+  for (i = 0; i <= 0777777; i++)
+    write_location (f, memory, i);
+
+  /* Start. */
+  if (start_instruction <= 0)
+    ;
+  else if (((start_instruction & 0777000000000LL) == JRST) ||
+	   start_instruction <= 0777777)
+    fprintf (f, "go %06llo\n", start_instruction & 0777777);
+  else
+    fprintf (f, ";execute %012llo\n", start_instruction);
+}
+
+struct file_format simh_file_format = {
+  "simh",
+  NULL,
+  write_simh
+};