mirror of
https://github.com/holub/mame
synced 2025-04-25 09:50:04 +03:00
(MESS) unior : added DMA and CTRC devices (nw)
This commit is contained in:
Robbbert
parent
7ed7b9ba41
commit
13786cb027
@ -2,11 +2,11 @@
|
||||
|
||||
Unior
|
||||
|
||||
12/05/2009 Skeleton driver.
|
||||
2009-05-12 Skeleton driver.
|
||||
2013-10-09 Added DMA and CRTC
|
||||
|
||||
Some info obtained from EMU-80.
|
||||
There are no manuals, diagrams, or anything else available afaik.
|
||||
The entire driver is guesswork.
|
||||
The schematic is difficult to read, and some code is guesswork.
|
||||
|
||||
The monitor will only allow certain characters to be typed, thus the
|
||||
modifier keys appear to do nothing. There is no need to use the enter
|
||||
@ -26,7 +26,7 @@ L - list registers
|
||||
M
|
||||
|
||||
ToDo:
|
||||
- All devices
|
||||
- Some devices
|
||||
- Beeper (requires a timer chip)
|
||||
- Cassette (requires a UART)
|
||||
- Colour?
|
||||
@ -35,32 +35,35 @@ ToDo:
|
||||
|
||||
#include "emu.h"
|
||||
#include "cpu/i8085/i8085.h"
|
||||
#include "machine/8257dma.h"
|
||||
#include "video/i8275.h"
|
||||
|
||||
|
||||
class unior_state : public driver_device
|
||||
{
|
||||
public:
|
||||
unior_state(const machine_config &mconfig, device_type type, const char *tag)
|
||||
: driver_device(mconfig, type, tag),
|
||||
m_p_videoram(*this, "p_videoram"),
|
||||
m_maincpu(*this, "maincpu") { }
|
||||
: driver_device(mconfig, type, tag)
|
||||
, m_maincpu(*this, "maincpu")
|
||||
, m_dma(*this, "dma")
|
||||
{ }
|
||||
|
||||
DECLARE_WRITE8_MEMBER(vram_w);
|
||||
DECLARE_WRITE8_MEMBER(unior_4c_w);
|
||||
DECLARE_READ8_MEMBER(unior_4c_r);
|
||||
DECLARE_READ8_MEMBER(unior_4d_r);
|
||||
DECLARE_WRITE8_MEMBER(unior_50_w);
|
||||
DECLARE_WRITE8_MEMBER(unior_60_w);
|
||||
DECLARE_WRITE8_MEMBER(cpu_status_callback);
|
||||
DECLARE_PALETTE_INIT(unior);
|
||||
DECLARE_READ8_MEMBER(dma_r);
|
||||
UINT8 *m_p_vram;
|
||||
required_shared_ptr<UINT8> m_p_videoram;
|
||||
UINT8 *m_p_chargen;
|
||||
private:
|
||||
UINT8 m_4c;
|
||||
UINT8 m_cursor_col;
|
||||
UINT8 m_cursor_row;
|
||||
virtual void machine_reset();
|
||||
virtual void video_start();
|
||||
UINT32 screen_update_unior(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
|
||||
required_device<cpu_device> m_maincpu;
|
||||
required_device<i8257_device> m_dma;
|
||||
};
|
||||
|
||||
READ8_MEMBER( unior_state::unior_4c_r )
|
||||
@ -91,38 +94,22 @@ WRITE8_MEMBER( unior_state::unior_50_w )
|
||||
memcpy(m_p_vram, m_p_vram+80, 24*80);
|
||||
}
|
||||
|
||||
WRITE8_MEMBER( unior_state::unior_60_w )
|
||||
{
|
||||
static UINT8 ctrl=0;
|
||||
if (offset)
|
||||
ctrl = 0; // port 61 - reset ctrl
|
||||
else
|
||||
if (ctrl)
|
||||
m_cursor_row = data; // port 60 - row
|
||||
else
|
||||
{
|
||||
m_cursor_col = data; // port 60 - column
|
||||
ctrl++;
|
||||
}
|
||||
}
|
||||
|
||||
static ADDRESS_MAP_START( unior_mem, AS_PROGRAM, 8, unior_state )
|
||||
ADDRESS_MAP_UNMAP_HIGH
|
||||
AM_RANGE(0x0000, 0xf7af) AM_RAM
|
||||
AM_RANGE(0xf7b0, 0xf7ff) AM_RAM AM_SHARE("p_videoram") // status line
|
||||
AM_RANGE(0x0000, 0xf7ff) AM_RAM
|
||||
AM_RANGE(0xf800, 0xffff) AM_ROM AM_WRITE(vram_w) // main video
|
||||
ADDRESS_MAP_END
|
||||
|
||||
static ADDRESS_MAP_START( unior_io, AS_IO, 8, unior_state )
|
||||
ADDRESS_MAP_UNMAP_HIGH
|
||||
ADDRESS_MAP_GLOBAL_MASK(0xff)
|
||||
AM_RANGE(0x30, 0x38) AM_NOP // dma data
|
||||
AM_RANGE(0x30, 0x38) AM_DEVREADWRITE("dma", i8257_device, i8257_r, i8257_w) // dma data
|
||||
AM_RANGE(0x3c, 0x3f) AM_NOP // cassette player control
|
||||
AM_RANGE(0x4c, 0x4c) AM_READWRITE(unior_4c_r,unior_4c_w)
|
||||
AM_RANGE(0x4d, 0x4d) AM_READ(unior_4d_r)
|
||||
AM_RANGE(0x4e, 0x4f) AM_NOP // possibly the control ports of a PIO
|
||||
AM_RANGE(0x50, 0x50) AM_WRITE(unior_50_w)
|
||||
AM_RANGE(0x60, 0x61) AM_READNOP AM_WRITE(unior_60_w)
|
||||
AM_RANGE(0x60, 0x61) AM_DEVREADWRITE("crtc", i8275_device, read, write)
|
||||
AM_RANGE(0xdc, 0xdf) AM_NOP // timer chip + beeper
|
||||
AM_RANGE(0xec, 0xed) AM_NOP // cassette data to&from UART
|
||||
ADDRESS_MAP_END
|
||||
@ -252,50 +239,6 @@ void unior_state::video_start()
|
||||
m_p_vram = memregion("vram")->base();
|
||||
}
|
||||
|
||||
UINT32 unior_state::screen_update_unior(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
|
||||
{
|
||||
UINT8 y,ra,gfx;
|
||||
UINT16 sy=0,ma=0,x,chr;
|
||||
UINT8 *videoram;
|
||||
videoram = m_p_videoram;
|
||||
static UINT8 framecnt=0;
|
||||
|
||||
framecnt++;
|
||||
|
||||
for (y = 0; y < 25; y++)
|
||||
{
|
||||
for (ra = 0; ra < 8; ra++)
|
||||
{
|
||||
UINT16 *p = &bitmap.pix16(sy++);
|
||||
|
||||
for (x = 0; x < 80; x++)
|
||||
{
|
||||
chr = videoram[x+ma];
|
||||
|
||||
gfx = m_p_chargen[(chr<<3) | ra ];
|
||||
|
||||
/* cursor */
|
||||
if ((y == m_cursor_row) && (x == m_cursor_col) && (ra > 6) & BIT(framecnt, 3))
|
||||
gfx ^= 0xff;
|
||||
|
||||
/* Display a scanline of a character */
|
||||
*p++ = BIT(gfx, 7);
|
||||
*p++ = BIT(gfx, 6);
|
||||
*p++ = BIT(gfx, 5);
|
||||
*p++ = BIT(gfx, 4);
|
||||
*p++ = BIT(gfx, 3);
|
||||
*p++ = BIT(gfx, 2);
|
||||
*p++ = BIT(gfx, 1);
|
||||
*p++ = BIT(gfx, 0);
|
||||
}
|
||||
}
|
||||
if (y)
|
||||
ma+=80;
|
||||
else
|
||||
videoram = m_p_vram;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* F4 Character Displayer */
|
||||
static const gfx_layout unior_charlayout =
|
||||
@ -315,12 +258,77 @@ static GFXDECODE_START( unior )
|
||||
GFXDECODE_ENTRY( "chargen", 0x0000, unior_charlayout, 0, 1 )
|
||||
GFXDECODE_END
|
||||
|
||||
static I8275_DISPLAY_PIXELS(display_pixels)
|
||||
{
|
||||
unior_state *state = device->machine().driver_data<unior_state>();
|
||||
const rgb_t *palette = palette_entry_list_raw(bitmap.palette());
|
||||
UINT8 gfx = state->m_p_chargen[(linecount & 7) | (charcode << 3)];
|
||||
if (vsp)
|
||||
gfx = 0;
|
||||
|
||||
if (lten)
|
||||
gfx = 0xff;
|
||||
|
||||
if (rvv)
|
||||
gfx ^= 0xff;
|
||||
|
||||
for(UINT8 i=0;i<6;i++)
|
||||
bitmap.pix32(y, x + i) = palette[BIT(gfx, 5-i) ? (hlgt ? 2 : 1) : 0];
|
||||
}
|
||||
|
||||
static const i8275_interface i8275_intf =
|
||||
{
|
||||
6,
|
||||
0,
|
||||
DEVCB_DEVICE_LINE_MEMBER("dma", i8257_device, i8257_drq2_w),
|
||||
DEVCB_NULL,
|
||||
DEVCB_NULL,
|
||||
DEVCB_NULL,
|
||||
display_pixels
|
||||
};
|
||||
|
||||
static const rgb_t unior_palette[3] =
|
||||
{
|
||||
MAKE_RGB(0x00, 0x00, 0x00), // black
|
||||
MAKE_RGB(0xa0, 0xa0, 0xa0), // white
|
||||
MAKE_RGB(0xff, 0xff, 0xff) // highlight
|
||||
};
|
||||
|
||||
PALETTE_INIT_MEMBER(unior_state,unior)
|
||||
{
|
||||
palette_set_colors(machine(), 0, unior_palette, ARRAY_LENGTH(unior_palette));
|
||||
}
|
||||
|
||||
READ8_MEMBER(unior_state::dma_r)
|
||||
{
|
||||
if (offset < 0xf800)
|
||||
return m_maincpu->space(AS_PROGRAM).read_byte(offset);
|
||||
else
|
||||
return m_p_vram[offset & 0x7ff];
|
||||
}
|
||||
|
||||
static I8257_INTERFACE( i8257_intf )
|
||||
{
|
||||
DEVCB_CPU_INPUT_LINE("maincpu", I8085_HALT),
|
||||
DEVCB_NULL,
|
||||
DEVCB_NULL,
|
||||
DEVCB_NULL,
|
||||
DEVCB_DEVICE_MEMBER("crtc", i8275_device, dack_w),
|
||||
{ DEVCB_NULL, DEVCB_NULL, DEVCB_DRIVER_MEMBER(unior_state, dma_r), DEVCB_NULL },
|
||||
{ DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL },
|
||||
};
|
||||
|
||||
WRITE8_MEMBER( unior_state::cpu_status_callback )
|
||||
{
|
||||
m_dma->i8257_hlda_w(BIT(data, 3));
|
||||
}
|
||||
|
||||
static MACHINE_CONFIG_START( unior, unior_state )
|
||||
/* basic machine hardware */
|
||||
MCFG_CPU_ADD("maincpu",I8080, 2222222)
|
||||
MCFG_CPU_ADD("maincpu",I8080, XTAL_20MHz / 9) // unknown clock
|
||||
MCFG_CPU_PROGRAM_MAP(unior_mem)
|
||||
MCFG_CPU_IO_MAP(unior_io)
|
||||
|
||||
MCFG_I8085A_STATUS(WRITE8(unior_state, cpu_status_callback))
|
||||
|
||||
/* video hardware */
|
||||
MCFG_SCREEN_ADD("screen", RASTER)
|
||||
@ -328,10 +336,13 @@ static MACHINE_CONFIG_START( unior, unior_state )
|
||||
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
|
||||
MCFG_SCREEN_SIZE(640, 200)
|
||||
MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 200-1)
|
||||
MCFG_SCREEN_UPDATE_DRIVER(unior_state, screen_update_unior)
|
||||
MCFG_SCREEN_UPDATE_DEVICE("crtc", i8275_device, screen_update)
|
||||
MCFG_GFXDECODE(unior)
|
||||
MCFG_PALETTE_LENGTH(2)
|
||||
MCFG_PALETTE_INIT_OVERRIDE(driver_device, black_and_white)
|
||||
MCFG_PALETTE_LENGTH(3)
|
||||
MCFG_PALETTE_INIT_OVERRIDE(unior_state,unior)
|
||||
|
||||
MCFG_I8257_ADD("dma", XTAL_20MHz / 9, i8257_intf) // unknown clock
|
||||
MCFG_I8275_ADD("crtc", i8275_intf)
|
||||
MACHINE_CONFIG_END
|
||||
|
||||
/* ROM definition */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user