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Diffstat (limited to 'src/mess/formats/cbm_snqk.c')
-rw-r--r--src/mess/formats/cbm_snqk.c184
1 files changed, 184 insertions, 0 deletions
diff --git a/src/mess/formats/cbm_snqk.c b/src/mess/formats/cbm_snqk.c
new file mode 100644
index 00000000000..99ffe81b7ef
--- /dev/null
+++ b/src/mess/formats/cbm_snqk.c
@@ -0,0 +1,184 @@
+/***********************************************
+
+ CBM Quickloads
+
+ ***********************************************/
+
+#include "emu.h"
+#include "cbm_snqk.h"
+
+/* prg file format
+ * sfx file format
+ * sda file format
+ * 0 lsb 16bit address
+ * 2 chip data */
+
+/* p00 file format (p00 .. p63, s00 .. s63, ..)
+ * 0x0000 C64File
+ * 0x0007 0
+ * 0x0008 Name in commodore encoding?
+ * 0x0018 0 0
+ * 0x001a lsb 16bit address
+ * 0x001c data */
+
+
+static int general_cbm_loadsnap( device_image_interface &image, const char *file_type, int snapshot_size,
+ offs_t offset, void (*cbm_sethiaddress)(running_machine &machine, UINT16 hiaddress) )
+{
+ char buffer[7];
+ UINT8 *data = NULL;
+ UINT32 bytesread;
+ UINT16 address = 0;
+ int i;
+ address_space *space = image.device().machine().firstcpu->memory().space(AS_PROGRAM);
+
+ if (!file_type)
+ goto error;
+
+ if (!mame_stricmp(file_type, "prg"))
+ {
+ /* prg files */
+ }
+ else if (!mame_stricmp(file_type, "p00"))
+ {
+ /* p00 files */
+ if (image.fread( buffer, sizeof(buffer)) != sizeof(buffer))
+ goto error;
+ if (memcmp(buffer, "C64File", sizeof(buffer)))
+ goto error;
+ image.fseek(26, SEEK_SET);
+ snapshot_size -= 26;
+ }
+ else if (!mame_stricmp(file_type, "t64"))
+ {
+ /* t64 files - for GB64 Single T64s loading to x0801 - header is always the same size */
+ if (image.fread( buffer, sizeof(buffer)) != sizeof(buffer))
+ goto error;
+ if (memcmp(buffer, "C64 tape image file", sizeof(buffer)))
+ goto error;
+ image.fseek(94, SEEK_SET);
+ snapshot_size -= 94;
+ }
+ else
+ {
+ goto error;
+ }
+
+ image.fread( &address, 2);
+ address = LITTLE_ENDIANIZE_INT16(address);
+ if (!mame_stricmp(file_type, "t64"))
+ address = 2049;
+ snapshot_size -= 2;
+
+ data = (UINT8*)malloc(snapshot_size);
+ if (!data)
+ goto error;
+
+ bytesread = image.fread( data, snapshot_size);
+ if (bytesread != snapshot_size)
+ goto error;
+
+ for (i = 0; i < snapshot_size; i++)
+ space->write_byte(address + i + offset, data[i]);
+
+ cbm_sethiaddress(image.device().machine(), address + snapshot_size);
+ free(data);
+ return IMAGE_INIT_PASS;
+
+error:
+ if (data)
+ free(data);
+ return IMAGE_INIT_FAIL;
+}
+
+static void cbm_quick_sethiaddress( running_machine &machine, UINT16 hiaddress )
+{
+ address_space *space = machine.firstcpu->memory().space(AS_PROGRAM);
+
+ space->write_byte(0x31, hiaddress & 0xff);
+ space->write_byte(0x2f, hiaddress & 0xff);
+ space->write_byte(0x2d, hiaddress & 0xff);
+ space->write_byte(0x32, hiaddress >> 8);
+ space->write_byte(0x30, hiaddress >> 8);
+ space->write_byte(0x2e, hiaddress >> 8);
+}
+
+QUICKLOAD_LOAD( cbm_c16 )
+{
+ return general_cbm_loadsnap(image, file_type, quickload_size, 0, cbm_quick_sethiaddress);
+}
+
+QUICKLOAD_LOAD( cbm_c64 )
+{
+ return general_cbm_loadsnap(image, file_type, quickload_size, 0, cbm_quick_sethiaddress);
+}
+
+QUICKLOAD_LOAD( cbm_vc20 )
+{
+ return general_cbm_loadsnap(image, file_type, quickload_size, 0, cbm_quick_sethiaddress);
+}
+
+static void cbm_pet_quick_sethiaddress( running_machine &machine, UINT16 hiaddress )
+{
+ address_space *space = machine.firstcpu->memory().space(AS_PROGRAM);
+
+ space->write_byte(0x2e, hiaddress & 0xff);
+ space->write_byte(0x2c, hiaddress & 0xff);
+ space->write_byte(0x2a, hiaddress & 0xff);
+ space->write_byte(0x2f, hiaddress >> 8);
+ space->write_byte(0x2d, hiaddress >> 8);
+ space->write_byte(0x2b, hiaddress >> 8);
+}
+
+QUICKLOAD_LOAD( cbm_pet )
+{
+ return general_cbm_loadsnap(image, file_type, quickload_size, 0, cbm_pet_quick_sethiaddress);
+}
+
+static void cbm_pet1_quick_sethiaddress(running_machine &machine, UINT16 hiaddress)
+{
+ address_space *space = machine.firstcpu->memory().space(AS_PROGRAM);
+
+ space->write_byte(0x80, hiaddress & 0xff);
+ space->write_byte(0x7e, hiaddress & 0xff);
+ space->write_byte(0x7c, hiaddress & 0xff);
+ space->write_byte(0x81, hiaddress >> 8);
+ space->write_byte(0x7f, hiaddress >> 8);
+ space->write_byte(0x7d, hiaddress >> 8);
+}
+
+QUICKLOAD_LOAD( cbm_pet1 )
+{
+ return general_cbm_loadsnap(image, file_type, quickload_size, 0, cbm_pet1_quick_sethiaddress);
+}
+
+static void cbmb_quick_sethiaddress(running_machine &machine, UINT16 hiaddress)
+{
+ address_space *space = machine.firstcpu->memory().space(AS_PROGRAM);
+
+ space->write_byte(0xf0046, hiaddress & 0xff);
+ space->write_byte(0xf0047, hiaddress >> 8);
+}
+
+QUICKLOAD_LOAD( cbmb )
+{
+ return general_cbm_loadsnap(image, file_type, quickload_size, 0x10000, cbmb_quick_sethiaddress);
+}
+
+QUICKLOAD_LOAD( p500 )
+{
+ return general_cbm_loadsnap(image, file_type, quickload_size, 0, cbmb_quick_sethiaddress);
+}
+
+static void cbm_c65_quick_sethiaddress( running_machine &machine, UINT16 hiaddress )
+{
+ address_space *space = machine.firstcpu->memory().space(AS_PROGRAM);
+
+ space->write_byte(0x82, hiaddress & 0xff);
+ space->write_byte(0x83, hiaddress >> 8);
+}
+
+QUICKLOAD_LOAD( cbm_c65 )
+{
+ return general_cbm_loadsnap(image, file_type, quickload_size, 0, cbm_c65_quick_sethiaddress);
+}