summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/svi3x8/expander/sv603.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/bus/svi3x8/expander/sv603.cpp')
-rw-r--r--src/devices/bus/svi3x8/expander/sv603.cpp99
1 files changed, 66 insertions, 33 deletions
diff --git a/src/devices/bus/svi3x8/expander/sv603.cpp b/src/devices/bus/svi3x8/expander/sv603.cpp
index e32fb2ac5d3..ce4a9f11bcf 100644
--- a/src/devices/bus/svi3x8/expander/sv603.cpp
+++ b/src/devices/bus/svi3x8/expander/sv603.cpp
@@ -8,7 +8,6 @@
#include "emu.h"
#include "sv603.h"
-
#include "softlist.h"
#include "speaker.h"
@@ -42,30 +41,19 @@ MACHINE_CONFIG_START(sv603_device::device_add_mconfig)
MCFG_DEVICE_ADD("snd", SN76489A, XTAL(10'738'635) / 3)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
+ // controller ports
+ COLECOVISION_CONTROL_PORT(config, m_joy[0], colecovision_control_port_devices, "hand");
+ m_joy[0]->irq().set(FUNC(sv603_device::joy_irq_w<0>));
+ COLECOVISION_CONTROL_PORT(config, m_joy[1], colecovision_control_port_devices, nullptr);
+ m_joy[1]->irq().set(FUNC(sv603_device::joy_irq_w<1>));
+
// cartridge slot
- MCFG_GENERIC_CARTSLOT_ADD("cartslot", generic_plain_slot, "coleco_cart")
- MCFG_GENERIC_EXTENSIONS("bin,rom,col")
- MCFG_GENERIC_LOAD(sv603_device, cartridge)
+ COLECOVISION_CARTRIDGE_SLOT(config, m_cart, colecovision_cartridges, nullptr);
SOFTWARE_LIST(config, "cart_list").set_original("coleco");
MACHINE_CONFIG_END
//**************************************************************************
-// CARTRIDGE
-//**************************************************************************
-
-DEVICE_IMAGE_LOAD_MEMBER( sv603_device, cartridge )
-{
- uint32_t size = m_cart_rom->common_get_size("rom");
-
- m_cart_rom->rom_alloc(size, GENERIC_ROM8_WIDTH, ENDIANNESS_LITTLE);
- m_cart_rom->common_load_rom(m_cart_rom->get_rom_base(), size, "rom");
-
- return image_init_result::PASS;
-}
-
-
-//**************************************************************************
// LIVE DEVICE
//**************************************************************************
@@ -78,7 +66,8 @@ sv603_device::sv603_device(const machine_config &mconfig, const char *tag, devic
device_svi_expander_interface(mconfig, *this),
m_bios(*this, "bios"),
m_snd(*this, "snd"),
- m_cart_rom(*this, "cartslot")
+ m_joy{ {*this, "joy1"}, {*this, "joy2"} },
+ m_cart(*this, COLECOVISION_CARTRIDGE_SLOT_TAG)
{
}
@@ -104,20 +93,33 @@ void sv603_device::device_reset()
// IMPLEMENTATION
//**************************************************************************
+template<int N>
+WRITE_LINE_MEMBER( sv603_device::joy_irq_w )
+{
+ m_expander->int_w(state);
+}
+
uint8_t sv603_device::mreq_r(offs_t offset)
{
+ uint8_t data = 0xff;
+
+ // ls138 (active low)
+ int ccs1 = ((offset >> 13) == 0) ? 0 : 1;
+ int ccs2 = ((offset >> 13) == 1) ? 0 : 1;
+ int ccs3 = ((offset >> 13) == 2) ? 0 : 1;
+ int ccs4 = ((offset >> 13) == 3) ? 0 : 1;
+ int bios = ((offset >> 13) == 4) ? 0 : 1;
+ // 5, 6, 7: not connected
+
m_expander->romdis_w(0);
+ m_expander->ramdis_w(bios);
- if (offset < 0x8000)
- return m_cart_rom->read_rom(offset);
+ data &= m_cart->bd_r(offset, data, ccs1, ccs2, ccs3, ccs4);
- if (offset >= 0x8000 && offset < 0xa000)
- {
- m_expander->ramdis_w(0);
- return m_bios->as_u8(offset & 0x1fff);
- }
+ if (bios == 0)
+ data &= m_bios->as_u8(offset & 0x1fff);
- return 0xff;
+ return data;
}
void sv603_device::mreq_w(offs_t offset, uint8_t data)
@@ -127,17 +129,48 @@ void sv603_device::mreq_w(offs_t offset, uint8_t data)
uint8_t sv603_device::iorq_r(offs_t offset)
{
- if (offset >= 0xa0 && offset <= 0xbf)
- return m_expander->excs_r(offset);
+ uint8_t data = 0xff;
+
+ switch (offset & 0xe0)
+ {
+ case 0xa0:
+ data = m_expander->excs_r(offset);
+ break;
+
+ case 0xe0:
+ data = m_joy[BIT(offset, 1)]->read();
+ break;
+ }
- return 0xff;
+ return data;
}
void sv603_device::iorq_w(offs_t offset, uint8_t data)
{
- if (offset >= 0xa0 && offset <= 0xbf)
+ switch (offset & 0xe0)
+ {
+ case 0x80:
+ // keypad mode
+ m_joy[0]->common0_w(1);
+ m_joy[0]->common1_w(0);
+ m_joy[1]->common0_w(1);
+ m_joy[1]->common1_w(0);
+ break;
+
+ case 0xa0:
m_expander->excs_w(offset, data);
+ break;
+
+ case 0xc0:
+ // joystick mode
+ m_joy[0]->common0_w(0);
+ m_joy[0]->common1_w(1);
+ m_joy[1]->common0_w(0);
+ m_joy[1]->common1_w(1);
+ break;
- if (offset >= 0xe0 && offset <= 0xff)
+ case 0xe0:
m_snd->write(data);
+ break;
+ }
}