/***************************************************************************
Car Jamboree
Omori Electric CAD (OEC) 1983
c14 c.d19
c13 c.d18 c10
c12 c9
c11 2125 2125
2125 2125
2125 2125 2114 2114
2125 2125 2114 2114
2125 2125 c8
2125 2125 c7
c6
c5
c4
c3
5101 c2
5101 c1
6116
18.432MHz
6116
Z80A c15
Z80A
8910 SW
8910
Notes:
- some sprite glitches from sprite number/colour changes happening on
different frames, possibly original behaviour. eg cars changing colour
just before exploding, animals displaying as the wrong sprite for one
frame when entering the arena
- colours look wrong, maybe address bitswap?
- background colour calculation is a guess
***************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/*
* msx.c: MSX emulation
*
* Copyright (C) 2004 Sean Young
*
* Todo:
*
* - fix mouse support
* - cassette support doesn't work
* - Ensure changing cartridge after boot works
* - wd2793, nms8255
*/
#include "emu.h"
#include "includes/msx.h"
#define VERBOSE 0
void msx_state::machine_reset()
{
msx_memory_reset ();
msx_memory_map_all ();
}
void msx_state::machine_start()
{
m_leds.resolve();
m_port_c_old = 0xff;
}
void msx2_state::machine_start()
{
msx_state::machine_start();
for (device_t &device : device_iterator(*this))
{
msx_switched_interface *switched;
if (device.interface(switched))
{
m_switched.push_back(switched);
}
}
save_item(NAME(m_rtc_latch));
}
static const uint8_t cc_op[0x100] = {
4+1,10+1, 7+1, 6+1, 4+1, 4+1, 7+1, 4+1, 4+1,11+1, 7+1, 6+1, 4+1, 4+1, 7+1, 4+1,
8+1,10+1, 7+1, 6+1, 4+1, 4+1, 7+1, 4+1,12+1,11+1, 7+1, 6+1, 4+1, 4+1, 7+1, 4+1,
7+1,10+1,16+1, 6+1, 4+1, 4+1, 7+1, 4+1, 7+1,11+1,16+1, 6+1, 4+1, 4+1, 7+1, 4+1,
7+1,10+1,13+1, 6+1,11+1,11+1,10+1, 4+1, 7+1,11+1,13+1, 6+1, 4+1, 4+1, 7+1, 4+1,
4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1,
4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1,
4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1,
7+1, 7+1, 7+1, 7+1, 7+1, 7+1, 4+1, 7+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1,
4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1,
4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1,
4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1,
4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 4+1, 7+1, 4+1,
5+1,10+1,10+1,10+1,10+1,11+1, 7+1,11+1, 5+1,10+1,10+1, 0 ,10+1,17+1, 7+1,11+1,
5+1,10+1,10+1,11+1,10+1,11+1, 7+1,11+1, 5+1, 4+1,10+1,11+1,10+1, 0 , 7+1,11+1,
5+1,10+1,10+1,19+1,10+1,11+1, 7+1,11+1, 5+1, 4+1,10+1, 4+1,10+1, 0 , 7+1,11+1,
5+1,10+1,10+1, 4+1,10+1,11+1, 7+1,11+1, 5+1, 6+1,10+1, 4+1,10+1, 0 , 7+1,11+1
};
static const uint8_t cc_cb[0x100] = {
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,12+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,12+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,12+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,12+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,12+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,12+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,12+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,12+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,15+2, 8+2
};
static const uint8_t cc_ed[0x100] = {
8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,
12+2,12+2,15+2,20+2, 8+2,14+2, 8+2, 9+2,12+2,12+2,15+2,20+2, 8+2,14+2, 8+2, 9+2,
12+2,12+2,15+2,20+2, 8+2,14+2, 8+2, 9+2,12+2,12+2,15+2,20+2, 8+2,14+2, 8+2, 9+2,
12+2,12+2,15+2,20+2, 8+2,14+2, 8+2,18+2,12+2,12+2,15+2,20+2, 8+2,14+2, 8+2,18+2,
12+2,12+2,15+2,20+2, 8+2,14+2, 8+2, 8+2,12+2,12+2,15+2,20+2, 8+2,14+2, 8+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,
16+2,16+2,16+2,16+2, 8+2, 8+2, 8+2, 8+2,16+2,16+2,16+2,16+2, 8+2, 8+2, 8+2, 8+2,
16+2,16+2,16+2,16+2, 8+2, 8+2, 8+2, 8+2,16+2,16+2,16+2,16+2, 8+2, 8+2, 8+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2,
8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2, 8+2
};
static const uint8_t cc_xy[0x100] = {
4+4+2,10+4+2, 7+4+2, 6+4+2, 4+4+2, 4+4+2, 7+4+2, 4+4+2, 4+4+2,11+4+2, 7+4+2, 6+4+2, 4+4+2, 4+4+2, 7+4+2, 4+4+2,
8+4+2,10+4+2, 7+4+2, 6+4+2, 4+4+2, 4+4+2, 7+4+2, 4+4+2,12+4+2,11+4+2, 7+4+2, 6+4+2, 4+4+2, 4+4+2, 7+4+2, 4+4+2,
7+4+2,10+4+2,16+4+2, 6+4+2, 4+4+2, 4+4+2, 7+4+2, 4+4+2, 7+4+2,11+4+2,16+4+2, 6+4+2, 4+4+2, 4+4+2, 7+4+2, 4+4+2,
7+4+2,10+4+2,13+4+2, 6+4+2,23 +2,23 +2,19 +2, 4+4+2, 7+4+2,11+4+2,13+4+2, 6+4+2, 4+4+2, 4+4+2, 7+4+2, 4+4+2,
4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2,
4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2,
4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2,
19 +2,19 +2,19 +2,19 +2,19 +2,19 +2, 4+4+2,19 +2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2,
4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2,
4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2,
4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2,
4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2, 4+4+2,19 +2, 4+4+2,
5+4+2,10+4+2,10+4+2,10+4+2,10+4+2,11+4+2, 7+4+2,11+4+2, 5+4+2,10+4+2,10+4+2, 0 ,10+4+2,17+4+2, 7+4+2,11+4+2,
5+4+2,10+4+2,10+4+2,11+4+2,10+4+2,11+4+2, 7+4+2,11+4+2, 5+4+2, 4+4+2,10+4+2,11+4+2,10+4+2, 4 +1, 7+4+2,11+4+2,
5+4+2,10+4+2,10+4+2,19+4+2,10+4+2,11+4+2, 7+4+2,11+4+2, 5+4+2, 4+4+2,10+4+2, 4+4+2,10+4+2, 4 +1, 7+4+2,11+4+2,
5+4+2,10+4+2,10+4+2, 4+4+2,10+4+2,11+4+2, 7+4+2,11+4+2, 5+4+2, 6+4+2,10+4+2, 4+4+2,10+4+2, 4 +1, 7+4+2,11+4+2
};
static const uint8_t cc_xycb[0x100] = {
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,
20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,
20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,
20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,
20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,20+2,
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,
23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2,23+2
};
/* extra cycles if jr/jp/call taken and 'interrupt latency' on rst 0-7 */
static const uint8_t cc_ex[0x100] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* DJNZ */
5, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, /* JR NZ/JR Z */
5, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, /* JR NC/JR C */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
5, 5, 5, 5, 0, 0, 0, 0, 5, 5, 5, 5, 0, 0, 0, 0, /* LDIR/CPIR/INIR/OTIR LDDR/CPDR/INDR/OTDR */
6, 0, 0, 0, 7, 0, 0, 2, 6, 0, 0, 0, 7, 0, 0, 2,
6, 0, 0, 0, 7, 0, 0, 2, 6, 0, 0, 0, 7, 0, 0, 2,
6, 0, 0, 0, 7, 0, 0, 2, 6, 0, 0, 0, 7, 0, 0, 2,
6, 0, 0, 0, 7, 0, 0, 2, 6, 0, 0, 0, 7, 0, 0, 2+1
};
void msx_state::driver_start()
{
m_maincpu->set_input_line_vector(0, 0xff); // Z80
msx_memory_init();
m_maincpu->z80_set_cycle_tables( cc_op, cc_cb, cc_ed, cc_xy, cc_xycb, cc_ex );
save_item(NAME(m_psg_b));
save_item(NAME(m_mouse));
save_item(NAME(m_mouse_stat));
save_item(NAME(m_kanji_latch));
save_item(NAME(m_slot_expanded));
save_item(NAME(m_primary_slot));
save_item(NAME(m_secondary_slot));
save_item(NAME(m_port_c_old));
save_item(NAME(m_keylatch));
}
void msx_state::device_post_load()
{
for (int page = 0; page < 4; page++)
{
int slot_primary = (m_primary_slot >> (page * 2)) & 3;
int slot_secondary = (m_secondary_slot[slot_primary] >> (page * 2)) & 3;
m_current_page[page] = m_all_slots[slot_primary][slot_secondary][page];
}
}
INTERRUPT_GEN_MEMBER(msx_state::msx_interrupt)
{
m_mouse[0] = m_io_mouse[0]->read();
m_mouse_stat[0] = -1;
m_mouse[1] = m_io_mouse[1]->read();
m_mouse_stat[1] = -1;
}
/*
** The I/O functions
*/
uint8_t msx_state::msx_psg_port_a_r()
{
uint8_t data = (m_cassette->input() > 0.0038 ? 0x80 : 0);
if ( (m_psg_b ^ m_io_dsw->read() ) & 0x40)
{
/* game port 2 */
uint8_t inp = m_io_joy[1]->read();
if ( !(inp & 0x80) )
{
/* joystick */
data |= ( inp & 0x7f );
}
else
{
/* mouse */
data |= ( inp & 0x70 );
if (m_mouse_stat[1] < 0)
data |= 0xf;
else
data |= ~(m_mouse[1] >> (4*m_mouse_stat[1]) ) & 15;
}
}
else
{
/* game port 1 */
uint8_t inp = m_io_joy[0]->read();
if ( !(inp & 0x80) )
{
/* joystick */
data |= ( inp & 0x7f );
}
else
{
/* mouse */
data |= ( inp & 0x70 );
if (m_mouse_stat[0] < 0)
data |= 0xf;
else
data |= ~(m_mouse[0] >> (4*m_mouse_stat[0]) ) & 15;
}
}
return data;
}
uint8_t msx_state::msx_psg_port_b_r()
{
return m_psg_b;
}
void msx_state::msx_psg_port_a_w(uint8_t data)
{
}
void msx_state::msx_psg_port_b_w(uint8_t data)
{
/* Arabic or kana mode led */
if ( (data ^ m_psg_b) & 0x80)
m_leds[1] = BIT(~data, 7);
if ( (m_psg_b ^ data) & 0x10)
{
if (++m_mouse_stat[0] > 3) m_mouse_stat[0] = -1;
}
if ( (m_psg_b ^ data) & 0x20)
{
if (++m_mouse_stat[1] > 3) m_mouse_stat[1] = -1;
}
m_psg_b = data;
}
/*
** RTC functions
*/
void msx2_state::msx_rtc_latch_w(uint8_t data)
{
m_rtc_latch = data & 15;
}
void msx2_state::msx_rtc_reg_w(uint8_t data)
{
m_rtc->write(m_rtc_latch, data);
}
uint8_t msx2_state::msx_rtc_reg_r()
{
return m_rtc->read(m_rtc_latch);
}
/*
** The PPI functions
*/
void msx_state::msx_ppi_port_a_w(uint8_t data)
{
m_primary_slot = data;
if (VERBOSE)
logerror ("write to primary slot select: %02x\n", m_primary_slot);
msx_memory_map_all ();
}
void msx_state::msx_ppi_port_c_w(uint8_t data)
{
m_keylatch = data & 0x0f;
/* caps lock */
if ( BIT(m_port_c_old ^ data, 6) )
m_leds[0] = BIT(~data, 6);
/* key click */
if ( BIT(m_port_c_old ^ data, 7) )
m_dac->write(BIT(data, 7));
/* cassette motor on/off */
if ( BIT(m_port_c_old ^ data, 4) )
m_cassette->change_state(BIT(data, 4) ? CASSETTE_MOTOR_DISABLED : CASSETTE_MOTOR_ENABLED, CASSETTE_MASK_MOTOR);
/* cassette signal write */
if ( BIT(m_port_c_old ^ data, 5) )
m_cassette->output(BIT(data, 5) ? -1.0 : 1.0);
m_port_c_old = data;
}
uint8_t msx_state::msx_ppi_port_b_r()
{
uint8_t result = 0xff;
int row, data;
row = m_keylatch;
if (row <= 10)
{
data = m_io_key[row / 2]->read();
if (BIT(row, 0))
data >>= 8;
result = data & 0xff;
}
return result;
}
/************************************************************************
*
* New memory emulation !!
*
***********************************************************************/
void msx_state::install_slot_pages(uint8_t prim, uint8_t sec, uint8_t page, uint8_t numpages, msx_internal_slot_interface &device)
{
for ( int i = page; i < std::min(page + numpages, 4); i++ )
{
m_all_slots[prim][sec][i] = &device;
}
if ( sec )
{
m_slot_expanded[prim] = true;
}
}
void msx_state::msx_memory_init()
{
int count_populated_pages = 0;
// Populate all unpopulated slots with the dummy interface
for (auto & elem : m_all_slots)
{
for ( int sec = 0; sec < 4; sec++ )
{
for ( int page = 0; page < 4; page++ )
{
if ( elem[sec][page] == nullptr )
{
elem[sec][page] = &m_empty_slot;
}
else
{
count_populated_pages++;
}
}
}
}
if ( count_populated_pages == 0 ) {
fatalerror("No msx slot layout defined for this system!\n");
}
}
void msx_state::msx_memory_reset ()
{
m_primary_slot = 0;
for (auto & elem : m_secondary_slot)
{
elem = 0;
}
}
void msx_state::msx_memory_map_page (uint8_t page)
{
int slot_primary = (m_primary_slot >> (page * 2)) & 3;
int slot_secondary = (m_secondary_slot[slot_primary] >> (page * 2)) & 3;
m_current_page[page] = m_all_slots[slot_primary][slot_secondary][page];
}
void msx_state::msx_memory_map_all ()
{
for (uint8_t i=0; i<4; i++)
msx_memory_map_page (i);
}
uint8_t msx_state::msx_mem_read(offs_t offset)
{
return m_current_page[offset >> 14]->read(offset);
}
void msx_state::msx_mem_write(offs_t offset, uint8_t data)
{
m_current_page[offset >> 14]->write(offset, data);
}
void msx_state::msx_sec_slot_w(uint8_t data)
{
int slot = m_primary_slot >> 6;
if (m_slot_expanded[slot])
{
if (VERBOSE)
logerror ("write to secondary slot %d select: %02x\n", slot, data);
m_secondary_slot[slot] = data;
msx_memory_map_all ();
}
else
m_current_page[3]->write(0xffff, data);
}
uint8_t msx_state::msx_sec_slot_r()
{
int slot = m_primary_slot >> 6;
if (m_slot_expanded[slot])
{
return ~m_secondary_slot[slot];
}
else
{
return m_current_page[3]->read(0xffff);
}
}
uint8_t msx_state::msx_kanji_r(offs_t offset)
{
uint8_t result = 0xff;
if (offset && m_region_kanji)
{
int latch = m_kanji_latch;
result = m_region_kanji->as_u8(latch++);
m_kanji_latch &= ~0x1f;
m_kanji_latch |= latch & 0x1f;
}
return result;
}
void msx_state::msx_kanji_w(offs_t offset, uint8_t data)
{
if (offset)
m_kanji_latch = (m_kanji_latch & 0x007E0) | ((data & 0x3f) << 11);
else
m_kanji_latch = (m_kanji_latch & 0x1f800) | ((data & 0x3f) << 5);
}
uint8_t msx2_state::msx_switched_r(offs_t offset)
{
uint8_t data = 0xff;
for (int i = 0; i < m_switched.size(); i++)
{
data &= m_switched[i]->switched_read(offset);
}
return data;
}
void msx2_state::msx_switched_w(offs_t offset, uint8_t data)
{
for (int i = 0; i < m_switched.size(); i++)
{
m_switched[i]->switched_write(offset, data);
}
}