X-Git-Url: http://cloudbase.mooo.com/gitweb/z180-stamp.git/blobdiff_plain/976db69ffa80c4d499e53f6f22c26d784fdac0a1..18d57acbf4ccd7220e59fe1f2ac1556837c5da83:/avr/cmd_mem.c

diff --git a/avr/cmd_mem.c b/avr/cmd_mem.c
index 3e18770..85b5a44 100644
--- a/avr/cmd_mem.c
+++ b/avr/cmd_mem.c
@@ -23,6 +23,7 @@
 #include "eval_arg.h"
 #include "timer.h"
 #include "z80-if.h"
+#include "disas_z180.h"
 #include "debug.h"
 
 
@@ -33,6 +34,7 @@
 /* Display values from last command.
  * Memory modify remembered values are different from display memory.
  */
+static uint32_t	disas_last_addr;
 static uint32_t	dp_last_addr;
 static uint32_t	dp_last_length = 0x100;
 static uint32_t	mm_last_addr;
@@ -66,6 +68,52 @@ command_ret_t do_mem_size(cmd_tbl_t *cmdtp UNUSED, uint_fast8_t flag UNUSED, int
 	return CMD_RET_SUCCESS;
 }
 
+/*
+* Disassemble code from memory
+*
+* Usage:
+* 	disassemble address [# of lines]
+*
+ */
+command_ret_t do_disas(cmd_tbl_t *cmdtp, uint_fast8_t flag, int argc, char * const argv[])
+{
+	(void) cmdtp;
+
+	/* We use the last specified parameters, unless new ones are
+	 * entered.
+	 */
+	uint32_t addr = disas_last_addr;
+	int length = 16;
+	int ret = CMD_RET_SUCCESS;
+
+	if (argc < 2)
+		return CMD_RET_USAGE;
+
+	if ((flag & CMD_FLAG_REPEAT) == 0) {
+		/* Address is specified since argc > 1 */
+		addr = eval_arg(argv[1], NULL);
+		addr += base_address;
+
+		/* If another parameter, it is the length (Number of lines) to display. */
+		if (argc > 2)
+			length = (int) eval_arg(argv[2], NULL);
+	}
+
+	z80_bus_request_or_exit();
+	clear_ctrlc();					/* forget any previous Control-C */
+	for (; length > 0; --length) {
+		addr = dis_decode(addr);
+		if (had_ctrlc() || ctrlc()) {
+			ret = CMD_RET_FAILURE;
+			break;
+		}
+	}
+	z80_bus_cmd(Release);
+	disas_last_addr = addr;
+
+	return ret;
+}
+
 /* Memory Display
  *
  * Syntax: