-/* memory.c */
+/*
+ * memory.c
+ *
+ * Copyright (C) 1999 Jonathan St-André
+ * Copyright (C) 1999 Hugo Villeneuve <hugo@hugovil.com>
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#include <stdio.h>
+#include <string.h>
+#include "common.h"
+#include "cpu8051.h"
+#include "hexfile.h"
#include "memory.h"
-
-#define SFR_MEM_SIZE 128
#define PGM_MEM_SIZE 65536
-#define INT_MEM_SIZE 128
+#define INT_MEM_SIZE 256 /* IRAM = Direct addresses $00 to $7F
+ * SFR = Direct addresses $80 to $FF */
#define EXT_MEM_SIZE 65536
-
-u_int8_t sfr_mem[SFR_MEM_SIZE];
-u_int8_t pgm_mem[PGM_MEM_SIZE];
-u_int8_t int_mem[INT_MEM_SIZE];
-u_int8_t ext_mem[EXT_MEM_SIZE];
-
+static u_int8_t pgm_mem[PGM_MEM_SIZE];
+static u_int8_t int_mem[INT_MEM_SIZE];
+static u_int8_t ext_mem[EXT_MEM_SIZE];
void
-memory_write8( int memory_id, unsigned long address, u_int8_t value )
+memory_write8(int memory_id, unsigned long address, u_int8_t value)
{
- switch( memory_id ) {
- case SFR_MEM_ID:
- if( address >= SFR_MEM_SIZE ) {
- return;
- }
- else {
- sfr_mem[address] = value;
- }
- break;
- case PGM_MEM_ID:
- if( address >= PGM_MEM_SIZE ) {
- return;
- }
- else {
- pgm_mem[address] = value;
- }
- break;
- case INT_MEM_ID:
- if( address >= INT_MEM_SIZE ) {
- return;
- }
- else {
- int_mem[address] = value;
- }
- break;
- case EXT_MEM_ID:
- if( address >= EXT_MEM_SIZE ) {
- return;
- }
- else {
- ext_mem[address] = value;
- }
- break;
- default:
- /* Error. */
- break;
- }
+ switch (memory_id) {
+ case PGM_MEM_ID:
+ if (address >= PGM_MEM_SIZE) {
+ printf("Address (%lu) is greater than PGM_MEM_SIZE\n",
+ address);
+ return;
+ } else
+ pgm_mem[address] = value;
+ break;
+ case INT_MEM_ID:
+ if (address >= INT_MEM_SIZE) {
+ printf("Address (%lu) is greater than INT_MEM_SIZE\n",
+ address);
+ return;
+ } else
+ int_mem[address] = value;
+ break;
+ case EXT_MEM_ID:
+ if (address >= EXT_MEM_SIZE) {
+ printf("Address (%lu) is greater than EXT_MEM_SIZE\n",
+ address);
+ return;
+ } else
+ ext_mem[address] = value;
+ break;
+ default:
+ /* Error. */
+ break;
+ }
}
-
u_int8_t
-memory_read8( int memory_id, unsigned long address )
+memory_read8(int memory_id, unsigned long address)
{
- switch( memory_id ) {
- case SFR_MEM_ID:
- if( address < SFR_MEM_SIZE ) {
- return sfr_mem[address];
- }
- else {
- return 0;
- }
- break;
- case PGM_MEM_ID:
- if( address < PGM_MEM_SIZE ) {
- return pgm_mem[address];
- }
- else {
- return 0;
- }
- break;
- case INT_MEM_ID:
- if( address < INT_MEM_SIZE ) {
- return int_mem[address];
- }
- else {
- return 0;
- }
- break;
- case EXT_MEM_ID:
- if( address < EXT_MEM_SIZE ) {
- return ext_mem[address];
- }
- else {
- return 0;
- }
- break;
- default:
- /* Error. */
- return 0;
- break;
- }
+ switch (memory_id) {
+ case PGM_MEM_ID:
+ if (address < PGM_MEM_SIZE)
+ return pgm_mem[address];
+ else {
+ printf("Address (%lu) is greater than PGM_MEM_SIZE\n",
+ address);
+ return 0;
+ }
+ break;
+ case INT_MEM_ID:
+ if (address < INT_MEM_SIZE)
+ return int_mem[address];
+ else {
+ printf("Address (%lu) is greater than INT_MEM_SIZE\n",
+ address);
+ return 0;
+ }
+ break;
+ case EXT_MEM_ID:
+ if (address < EXT_MEM_SIZE)
+ return ext_mem[address];
+ else {
+ printf("Address (%lu) is greater than EXT_MEM_SIZE\n",
+ address);
+ return 0;
+ }
+ break;
+ default:
+ /* Error. */
+ return 0;
+ break;
+ }
+}
+
+/* Dump memory */
+void
+DumpMem(char *buf, char *Address, int memory_id)
+{
+ unsigned int MemAddress;
+ int Offset, Column;
+ int size = 256;
+ int k = 0;
+
+ if (strlen(Address) != 0) {
+ if (STREQ(Address, "PC"))
+ MemAddress = cpu8051.pc;
+ else
+ MemAddress = Ascii2Hex(Address, strlen(Address));
+ } else {
+ MemAddress = 0;
+ }
+
+ for (Offset = 0; Offset < size; Offset += 16) {
+ unsigned char data[16];
+
+ sprintf(&buf[k], "%.4X ", MemAddress + Offset);
+ k = strlen(buf);
+
+ for (Column = 0; Column < 16; Column++) {
+ data[Column] = memory_read8(memory_id, MemAddress +
+ Offset + Column);
+ sprintf(&buf[k], " %.2X", (int) data[Column]);
+ k = strlen(buf);
+ }
+ sprintf(&buf[k], " ");
+ k = strlen(buf);
+
+ /* Display any ASCII characters */
+ for (Column = 0; Column < 16; Column++) {
+ if ((int) data[Column] >= 32 &&
+ (int) data[Column] <= 126) {
+ sprintf(&buf[k], "%c", data[Column]);
+ k = strlen(buf);
+ } else {
+ sprintf(&buf[k], ".");
+ k = strlen(buf);
+ }
+ }
+ sprintf(&buf[k], "\n");
+ k = strlen(buf);
+ }
}
projects / emu8051.git / blobdiff