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(MESS) tandy2k: WIP. (nw)

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This commit is contained in:
Curt Coder 2014-04-05 13:59:06 +00:00
parent 1d77e91173
commit 6bcf8f1c74
2 changed files with 39 additions and 6 deletions
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37
src/mess/drivers/tandy2k.c
View File

@ -12,11 +12,11 @@
TODO:
- video
- video (video RAM is at memory top - 0x1400, i.e. 0x1ec00)
- DMA
- floppy
- keyboard ROM
- hires graphics board
- floppy 720K DSQD
- DMA
- WD1010
- hard disk
- mouse
@ -27,8 +27,30 @@
// Read/Write Handlers
void tandy2k_state::update_drq()
{
int drq0 = CLEAR_LINE;
int drq1 = CLEAR_LINE;
for (int i = 0; i < 4; i++)
{
if (BIT(m_dma_mux, 0 + i))
{
if (BIT(m_dma_mux, 4 + i))
drq1 |= m_busdmarq[i];
else
drq0 |= m_busdmarq[i];
}
}
m_maincpu->drq0_w(drq0);
m_maincpu->drq1_w(drq1);
}
void tandy2k_state::dma_request(int line, int state)
{
m_busdmarq[line] = state;
update_drq();
}
void tandy2k_state::speaker_update()
@ -165,6 +187,8 @@ WRITE8_MEMBER( tandy2k_state::dma_mux_w )
int dme = (drq0 > 2) || (drq1 > 2);
m_pic1->ir6_w(dme);
update_drq();
}
READ8_MEMBER( tandy2k_state::kbint_clr_r )
@ -656,7 +680,6 @@ READ8_MEMBER( tandy2k_state::irq_callback )
void tandy2k_state::machine_start()
{
// memory banking
address_space &program = m_maincpu->space(AS_PROGRAM);
UINT8 *ram = m_ram->pointer();
int ram_size = m_ram->size();
@ -665,6 +688,10 @@ void tandy2k_state::machine_start()
m_char_ram.allocate(0x1000);
// HACK these should be connected to FDC HLD output
m_floppy0->mon_w(0);
m_floppy1->mon_w(0);
// register for state saving
save_item(NAME(m_dma_mux));
save_item(NAME(m_kbdclk));
@ -704,7 +731,6 @@ static MACHINE_CONFIG_START( tandy2k, tandy2k_state )
MCFG_DEVICE_ADDRESS_MAP(AS_0, vpac_mem)
MCFG_CRT9007_CHARACTER_WIDTH(10)
MCFG_CRT9007_INT_CALLBACK(DEVWRITELINE(I8259A_1_TAG, pic8259_device, ir1_w))
//MCFG_CRT9007_DMAR_CALLBACK(80186 HOLD)
MCFG_CRT9007_VS_CALLBACK(DEVWRITELINE(CRT9021B_TAG, crt9021_t, vsync_w))
MCFG_CRT9007_VLT_CALLBACK(WRITELINE(tandy2k_state, vpac_vlt_w))
MCFG_CRT9007_CURS_CALLBACK(DEVWRITELINE(CRT9021B_TAG, crt9021_t, cursor_w))
@ -758,6 +784,7 @@ static MACHINE_CONFIG_START( tandy2k, tandy2k_state )
MCFG_PIC8259_ADD(I8259A_0_TAG, DEVWRITELINE(I80186_TAG, i80186_cpu_device, int0_w), VCC, NULL)
MCFG_PIC8259_ADD(I8259A_1_TAG, DEVWRITELINE(I80186_TAG, i80186_cpu_device, int1_w), VCC, NULL)
MCFG_I8272A_ADD(I8272A_TAG, true)
downcast<i8272a_device *>(device)->set_select_lines_connected(true);
MCFG_UPD765_INTRQ_CALLBACK(DEVWRITELINE(I8259A_0_TAG, pic8259_device, ir4_w))
MCFG_UPD765_DRQ_CALLBACK(WRITELINE(tandy2k_state, fdc_drq))
MCFG_FLOPPY_DRIVE_ADD(I8272A_TAG ":0", tandy2k_floppies, "525qd", floppy_image_device::default_floppy_formats)

8
src/mess/includes/tandy2k.h
View File

@ -95,6 +95,10 @@ public:
m_centronics_perror(0),
m_centronics_busy(0)
{
for (int i = 0; i < 4; i++)
{
m_busdmarq[i] = CLEAR_LINE;
}
}
required_device<i80186_cpu_device> m_maincpu;
@ -122,8 +126,9 @@ public:
virtual void machine_start();
void speaker_update();
void update_drq();
void dma_request(int line, int state);
void speaker_update();
DECLARE_READ8_MEMBER( char_ram_r );
DECLARE_WRITE8_MEMBER( char_ram_w );
@ -173,6 +178,7 @@ public:
/* DMA state */
UINT8 m_dma_mux;
int m_busdmarq[4];
/* keyboard state */
int m_kbdclk;