Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-24 17:30:55 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

Updated notes for Alba ZG driver, nw

Browse Source
This commit is contained in:
Angelo Salese 2011-04-30 14:14:30 +00:00
parent 383b8b4421
commit 43edd7c59f
1 changed files with 17 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
src/mame/drivers/albazg.c
View File

@ -17,40 +17,19 @@ TODO:
there's an heavy x offsetting with the flip screen right now due of that (sets register
0x0d to 0x80 when the screen is upside-down)
-You can actually configure the coin chutes / coin lockout active high/low (!), obviously
MAME isn't really suitable for it at the current time;
MAME framework isn't really suitable for it at the current time;
PCB:
- HD46505SP-2 / HD68B45SP Japan
- Mostek MK3880P CPU, Z80 clone
- NEC D8255AC-2
- AY38910A/P
- X1-009 (labeled 8732K5), X1-0198 (or X1-019B, can't read)
- X2-004, X2-003, AX-014 (all with epoxy modulese apparently)
- X1-007
- CR-203 lithium battery, near X1-009 and X1-0198. There is also a switch near it
- Xtal 12 MHz at top right corner
============================================================================================
Code disassembling
(anything that I don't know the meaning is in brackets):
[0458]-> (Writes to ports 00 & 01)
[04bd]-> Enables prot lock
[04d9]-> Palette RAM init
[0c55]-> Video Ram Init
[04c3]-> Disables prot lock
[2603]-> Custom Ram Math
[008b]-> Custom Ram Check 1 [without prot lock]
[009A]-> Custom Ram Check 2 [must be NZ]
[010e]-> Video Ram Math 1 [$c000]
[00A0]-> Video Ram Check 1 [must be Z]
[013b]-> Video Ram Math 2 [$d000]
[00A6]-> Video Ram Check 2 [must be Z]
[0197]-> Eeprom Check 1
[2344] -> Eeprom sub check 1
[2318] -> Eeprom sub check 2
...
[0222]-> Back Up Check
[047c]-> (Writes to ports 83 & 80)
[0488]-> Multiple writes to sound ports 40 & 41
[04b4]-> Disables prot lock
[0810]->[08b5]->write & read to sound port 40
[08dd]->
[079d]->(write to port c0)
[0985]->Nvram lock enable/disable
...
[0b44]-> Nvram Check
[0b1a]-> Nvram Check
[090a]-> (?)
[0312]-> Eeprom init msg
*******************************************************************************************/
#include "emu.h"
@ -58,8 +37,9 @@ Code disassembling
#include "machine/eeprom.h"
#include "sound/ay8910.h"
#include "video/mc6845.h"
#include "machine/8255ppi.h"
#include "machine/i8255.h"
#define MASTER_CLOCK XTAL_12MHz
class albazg_state : public driver_device
{
@ -83,9 +63,6 @@ public:
UINT8 m_prot_lock;
};
#define MASTER_CLOCK XTAL_12MHz
static TILE_GET_INFO( y_get_bg_tile_info )
{
albazg_state *state = machine.driver_data<albazg_state>();
@ -238,7 +215,7 @@ static const mc6845_interface mc6845_intf =
NULL /* update address callback */
};
static const ppi8255_interface ppi8255_intf =
static I8255A_INTERFACE( ppi8255_intf )
{
DEVCB_NULL, /* Port A read */
DEVCB_INPUT_PORT("SYSTEM"), /* Port B read */
@ -269,7 +246,7 @@ static ADDRESS_MAP_START( port_map, AS_IO, 8 )
AM_RANGE(0x01, 0x01) AM_DEVWRITE("crtc", mc6845_register_w)
AM_RANGE(0x40, 0x40) AM_DEVREAD("aysnd", ay8910_r)
AM_RANGE(0x40, 0x41) AM_DEVWRITE("aysnd", ay8910_address_data_w)
AM_RANGE(0x80, 0x83) AM_DEVREADWRITE("ppi8255_0", ppi8255_r, ppi8255_w)
AM_RANGE(0x80, 0x83) AM_DEVREADWRITE_MODERN("ppi8255_0", i8255_device, read, write)
AM_RANGE(0xc0, 0xc0) AM_WRITE(watchdog_reset_w)
ADDRESS_MAP_END
@ -408,7 +385,7 @@ static MACHINE_CONFIG_START( yumefuda, albazg_state )
MCFG_WATCHDOG_VBLANK_INIT(8) // timing is unknown
MCFG_PPI8255_ADD( "ppi8255_0", ppi8255_intf )
MCFG_I8255A_ADD( "ppi8255_0", ppi8255_intf )
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)