(MESS) a78_slot: added logging of the A78 header, fixed identification of
some games when loaded from fullpath, and hopefully fixed crash when loading carts from the internal UI. nw.
This commit is contained in:
Fabio Priuli
parent
d19ac463a0
commit
c658d6e55e
@ -39,7 +39,9 @@ const device_type A78_CART_SLOT = &device_creator<a78_cart_slot_device>;
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//-------------------------------------------------
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device_a78_cart_interface::device_a78_cart_interface (const machine_config &mconfig, device_t &device)
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: device_slot_card_interface(mconfig, device)
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: device_slot_card_interface(mconfig, device),
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m_base_rom(0x8000),
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m_bank_mask(0)
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{
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}
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@ -60,7 +62,6 @@ void device_a78_cart_interface::rom_alloc(UINT32 size)
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{
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if (m_rom == NULL)
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{
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// allocate rom
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m_rom.resize(size);
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// setup other helpers
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@ -207,6 +208,8 @@ static const char *a78_get_slot(int type)
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bool a78_cart_slot_device::call_load()
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{
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if (m_cart)
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{
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UINT8 *ROM;
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UINT32 len;
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@ -233,7 +236,7 @@ bool a78_cart_slot_device::call_load()
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if (verify_header((char *)head) == IMAGE_VERIFY_FAIL)
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return IMAGE_INIT_FAIL;
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len = (head[49] << 24) |(head[50] << 16) |(head[51] << 8) | head[52];
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len = (head[49] << 24) | (head[50] << 16) | (head[51] << 8) | head[52];
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if (len + 128 > length())
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{
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logerror("Invalid length in the header. The game might be corrupted.\n");
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@ -275,8 +278,7 @@ bool a78_cart_slot_device::call_load()
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}
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logerror("Cart type: %x\n", m_type);
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// This field is currently only used for logging
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m_stick_type = head[55];
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internal_header_logging((UINT8 *)head, length());
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m_cart->rom_alloc(len);
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ROM = m_cart->get_rom_base();
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@ -296,7 +298,7 @@ bool a78_cart_slot_device::call_load()
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m_cart->nvram_alloc(0x800);
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battery_load(m_cart->get_nvram_base(), 0x800, 0xff);
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}
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}
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return IMAGE_INIT_PASS;
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}
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@ -380,7 +382,7 @@ void a78_cart_slot_device::get_default_card_software(astring &result)
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case 0x0003:
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type = A78_TYPE3;
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break;
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case 0x0004:
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case 0x0006:
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type = A78_TYPE6;
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break;
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case 0x000a:
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@ -477,38 +479,113 @@ WRITE8_MEMBER(a78_cart_slot_device::write_40xx)
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}
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/* Header format
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0 Header version - 1 byte
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1..16 "ATARI7800 " - 16 bytes
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17..48 Cart title - 32 bytes
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49..52 data length - 4 bytes
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53..54 cart type - 2 bytes
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bit 0 0x01 - pokey cart
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bit 1 0x02 - supercart bank switched
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bit 2 0x04 - supercart RAM at $4000
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bit 3 0x08 - additional ROM at $4000
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bit 4 0x10 - bank 6 at $4000
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bit 5 0x20 - supercart banked RAM
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/*-------------------------------------------------
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A78 header logging
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-------------------------------------------------*/
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bit 8-15 - Special
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0 = Normal cart
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1 = Absolute (F18 Hornet)
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2 = Activision
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void a78_cart_slot_device::internal_header_logging(UINT8 *header, UINT32 len)
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{
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char head_title[35];
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UINT32 head_length = (header[49] << 24) | (header[50] << 16) | (header[51] << 8) | header[52];
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UINT16 head_mapper = (header[53] << 8) | header[54];
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UINT8 head_ctrl1 = header[55];
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UINT8 head_ctrl2 = header[56];
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UINT8 head_ispal = header[57];
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astring cart_mapper, ctrl1, ctrl2;
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memcpy(head_title, header + 0x11, 0x20);
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55 controller 1 type - 1 byte
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56 controller 2 type - 1 byte
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0 = None
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1 = Joystick
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2 = Light Gun
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57 0 = NTSC/1 = PAL
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switch (head_mapper)
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{
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case 0x0000:
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cart_mapper.cpy("No Bankswitch");
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break;
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case 0x0001:
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cart_mapper.cpy("No Bankswitch + POKEY");
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break;
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case 0x0002:
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cart_mapper.cpy("SuperCart Bankswitch");
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break;
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case 0x0003:
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cart_mapper.cpy("SuperCart Bankswitch + POKEY");
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break;
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case 0x0006:
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cart_mapper.cpy("SuperCart Bankswitch + RAM");
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break;
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case 0x000a:
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cart_mapper.cpy("SuperCart 9Banks");
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break;
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case 0x000b:
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cart_mapper.cpy("SuperCart XM Compatible");
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break;
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case 0x0020:
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cart_mapper.cpy("SuperCart Bankswitch + 32K RAM");
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break;
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case 0x0100:
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cart_mapper.cpy("Absolute Bankswitch");
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break;
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case 0x0200:
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cart_mapper.cpy("Activision Bankswitch");
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break;
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default:
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cart_mapper.cpy("Unknown mapper");
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break;
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}
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100..127 "ACTUAL CART DATA STARTS HERE" - 28 bytes
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switch (head_ctrl1)
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{
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case 0x00:
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ctrl1.cpy("None");
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break;
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case 0x01:
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ctrl1.cpy("Joystick");
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break;
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case 0x02:
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ctrl1.cpy("Light Gun");
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break;
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default:
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ctrl1.cpy("Unknown controller");
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break;
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}
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Versions:
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Version 0: Initial release
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Version 1: Added PAL/NTSC bit. Added Special cart byte.
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Changed 53 bit 2, added bit 3
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switch (head_ctrl2)
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{
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case 0x00:
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ctrl2.cpy("None");
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break;
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case 0x01:
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ctrl2.cpy("Joystick");
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break;
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case 0x02:
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ctrl2.cpy("Light Gun");
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break;
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default:
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ctrl2.cpy("Unknown controller");
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break;
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}
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*/
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// TODO: log all properties from the header
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logerror( "ROM DETAILS\n" );
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logerror( "===========\n\n" );
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logerror( "\tTotal length (with header): 0x%x (%dK + 128b header)\n\nn", len, len/0x400);
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logerror( "HEADER DETAILS\n" );
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logerror( "==============\n\n" );
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logerror( "\tTitle: %.32s\n", head_title);
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logerror( "\tLength: 0x%X [real 0x%X]\n", head_length, len);
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logerror( "\tMapper: %s\n", cart_mapper.cstr());
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logerror( "\t\tPOKEY: %s\n", BIT(head_mapper, 0) ? "Yes" : "No");
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logerror( "\t\tSC Bankswitch: %s\n", BIT(head_mapper, 1) ? "Yes" : "No");
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logerror( "\t\tRAM at $4000: %s\n", BIT(head_mapper, 2) ? "Yes" : "No");
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logerror( "\t\tbank0 at $4000: %s\n", BIT(head_mapper, 3) ? "Yes" : "No");
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logerror( "\t\tbank6 at $4000: %s\n", BIT(head_mapper, 4) ? "Yes" : "No");
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logerror( "\t\tbanked RAM: %s\n", BIT(head_mapper, 5) ? "Yes" : "No");
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logerror( "\t\tSpecial: %s ", (head_mapper & 0xff00) ? "Yes" : "No");
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if (head_mapper & 0xff00)
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{
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logerror( "[%s]\n", (head_mapper & 0xff00) == 0x100 ? "Absolute" :
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(head_mapper & 0xff00) == 0x200 ? "Activision" : "Unknown" );
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}
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else
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logerror( "\n");
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logerror( "\tController 1: 0x%.2X [%s]\n", head_ctrl1, ctrl1.cstr());
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logerror( "\tController 2: 0x%.2X [%s]\n", head_ctrl2, ctrl2.cstr());
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logerror( "\tVideo: %s\n", (head_ispal) ? "PAL" : "NTSC");
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}
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@ -123,6 +123,7 @@ private:
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int m_stick_type;
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int verify_header(char *header);
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void internal_header_logging(UINT8 *header, UINT32 len);
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};
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@ -37,7 +37,8 @@
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TODO:
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- verify what happens when 2 POKEYs are present
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- verify whether high score works fine with XM
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- understand why high score in XM is not written to NVRAM
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- add Yamaha YM2151 when more clear specs are available
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***********************************************************************************************************/
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