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/***************************************************************************
coco12.c
TRS-80 Radio Shack Color Computer 1/2 Family
***************************************************************************/
#include "includes/coco12.h"
//-------------------------------------------------
// device_start
//-------------------------------------------------
void coco12_state::device_start()
{
coco_state::device_start();
configure_sam();
}
//-------------------------------------------------
// configure_sam
//-------------------------------------------------
void coco12_state::configure_sam()
{
cococart_slot_device *cart = m_cococart;
UINT8 *ram = m_ram->pointer();
UINT32 ram_size = m_ram->size();
UINT8 *rom = memregion(MAINCPU_TAG)->base();
UINT8 *cart_rom = cart->get_cart_base();
m_sam->configure_bank(0, ram, ram_size, false); // $0000-$7FFF
m_sam->configure_bank(1, &rom[0x0000], 0x2000, true); // $8000-$9FFF
m_sam->configure_bank(2, &rom[0x2000], 0x2000, true); // $A000-$BFFF
m_sam->configure_bank(3, cart_rom, 0x4000, true); // $C000-$FEFF
// $FF00-$FF1F
m_sam->configure_bank(4, read8_delegate(FUNC(coco12_state::ff00_read), this), write8_delegate(FUNC(coco12_state::ff00_write), this));
// $FF20-$FF3F
m_sam->configure_bank(5, read8_delegate(FUNC(coco12_state::ff20_read), this), write8_delegate(FUNC(coco12_state::ff20_write), this));
// $FF40-$FF5F
m_sam->configure_bank(6, read8_delegate(FUNC(coco12_state::ff40_read), this), write8_delegate(FUNC(coco12_state::ff40_write), this));
// $FF60-$FFBF
m_sam->configure_bank(7, read8_delegate(FUNC(coco12_state::ff60_read), this), write8_delegate(FUNC(coco12_state::ff60_write), this));
}
//-------------------------------------------------
// horizontal_sync
//-------------------------------------------------
WRITE_LINE_MEMBER( coco12_state::horizontal_sync )
{
m_pia_0->ca1_w(state);
m_sam->hs_w(state);
}
//-------------------------------------------------
// field_sync
//-------------------------------------------------
WRITE_LINE_MEMBER( coco12_state::field_sync )
{
m_pia_0->cb1_w(state);
}
//-------------------------------------------------
// sam_read
//-------------------------------------------------
READ8_MEMBER( coco12_state::sam_read )
{
UINT8 data = m_ram->read(offset);
m_vdg->as_w(data & 0x80 ? ASSERT_LINE : CLEAR_LINE);
m_vdg->inv_w(data & 0x40 ? ASSERT_LINE : CLEAR_LINE);
return data;
}
//-------------------------------------------------
// pia1_pb_changed
//-------------------------------------------------
void coco12_state::pia1_pb_changed(void)
{
/* call inherited function */
coco_state::pia1_pb_changed();
UINT8 data = m_pia_1->b_output();
m_vdg->css_w(data & 0x08);
m_vdg->intext_w(data & 0x10);
m_vdg->gm0_w(data & 0x10);
m_vdg->gm1_w(data & 0x20);
m_vdg->gm2_w(data & 0x40);
m_vdg->ag_w(data & 0x80);
}
//-------------------------------------------------
// update_cart_base
//-------------------------------------------------
void coco12_state::update_cart_base(UINT8 *cart_base)
{
m_sam->configure_bank(3, cart_base, 0x4000, true); // $C000-$FEFF
}
//-------------------------------------------------
// mc6847_config
//-------------------------------------------------
const mc6847_interface coco12_state::mc6847_config =
{
SCREEN_TAG,
DEVCB_DEVICE_MEMBER(SAM_TAG, sam6883_device, display_read)
};
//-------------------------------------------------
// sam6883_config
//-------------------------------------------------
const sam6883_interface coco12_state::sam6883_config =
{
MAINCPU_TAG,
AS_PROGRAM,
};
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