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-rw-r--r--src/mame/drivers/jonos.cpp90
1 files changed, 71 insertions, 19 deletions
diff --git a/src/mame/drivers/jonos.cpp b/src/mame/drivers/jonos.cpp
index 21fc52f2988..76ccdb1853e 100644
--- a/src/mame/drivers/jonos.cpp
+++ b/src/mame/drivers/jonos.cpp
@@ -12,13 +12,13 @@ CP/M. However, this one appears to be an 8085-based terminal.
Haven't found any info.
There are interrupt handlers at 5.5 (0x002c) and 6.5 (0x0034).
-Data presented at 5000 will appear on screen in a dumb-terminal format.
****************************************************************************/
#include "emu.h"
#include "cpu/i8085/i8085.h"
+#include "machine/keyboard.h"
#include "screen.h"
@@ -27,18 +27,24 @@ class jonos_state : public driver_device
public:
jonos_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
- , m_p_videoram(*this, "videoram")
, m_maincpu(*this, "maincpu")
+ , m_p_videoram(*this, "videoram")
, m_p_chargen(*this, "chargen")
{ }
- DECLARE_DRIVER_INIT(jonos);
- uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+ DECLARE_READ8_MEMBER(keyboard_r);
+ DECLARE_WRITE8_MEMBER(cursor_w);
+ u32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+ void kbd_put(u8 data);
private:
+ u8 m_framecnt;
+ u8 m_term_data;
+ u8 m_curs_ctrl;
+ u16 m_curs_pos;
virtual void machine_reset() override;
- required_shared_ptr<uint8_t> m_p_videoram;
required_device<cpu_device> m_maincpu;
+ required_shared_ptr<u8> m_p_videoram;
required_region_ptr<u8> m_p_chargen;
};
@@ -48,9 +54,9 @@ static ADDRESS_MAP_START(jonos_mem, AS_PROGRAM, 8, jonos_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x0000, 0x0fff) AM_ROM AM_REGION("roms", 0)
AM_RANGE(0x1800, 0x27ff) AM_RAM AM_SHARE("videoram")
- AM_RANGE(0x3000, 0x3001) // unknown device
+ AM_RANGE(0x3000, 0x3001) AM_WRITE(cursor_w) // unknown device
AM_RANGE(0x4000, 0x4001) // unknown device
- AM_RANGE(0x5000, 0x5003) // unknown device
+ AM_RANGE(0x5000, 0x5003) AM_READ(keyboard_r) // unknown device
AM_RANGE(0x6000, 0x6001) // unknown device
ADDRESS_MAP_END
@@ -58,29 +64,72 @@ ADDRESS_MAP_END
static INPUT_PORTS_START( jonos )
INPUT_PORTS_END
+void jonos_state::kbd_put(u8 data)
+{
+ m_term_data = data;
+}
+
+READ8_MEMBER( jonos_state::keyboard_r )
+{
+ if (offset == 0)
+ {
+ u8 data = m_term_data;
+ m_term_data = 0;
+ return data;
+ }
+ else
+ if (m_term_data && offset == 2)
+ return 0x20;
+
+ return 0;
+}
+
+WRITE8_MEMBER( jonos_state::cursor_w )
+{
+ if (offset == 1) // control byte
+ m_curs_ctrl = (data == 0x80) ? 1 : 0;
+ else
+ if (m_curs_ctrl == 1)
+ {
+ m_curs_pos = (m_curs_pos & 0xff00) | data;
+ m_curs_ctrl++;
+ }
+ else
+ if (m_curs_ctrl == 2)
+ m_curs_pos = (m_curs_pos & 0xff) | (data << 8);
+}
+
void jonos_state::machine_reset()
{
+ m_curs_ctrl = 0;
+ m_curs_pos = 0;
+ m_term_data = 0;
}
uint32_t jonos_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
- uint8_t y,ra,chr,gfx;
- uint16_t sy=0,ma=0,x;
+ m_framecnt++;
+ u8 y,ra,chr,gfx,inv;
+ u16 sy=0,x;
+ u16 ma = (m_p_videoram[0x7da] + (m_p_videoram[0x7db] << 8)) & 0x7ff;
- for (y = 0; y < 25; y++)
+ for (y = 0; y < 24; y++)
{
for (ra = 0; ra < 12; ra++)
{
- uint16_t *p = &bitmap.pix16(sy++);
+ u16 *p = &bitmap.pix16(sy++);
+ u16 cpos = y << 8;
for (x = ma; x < ma + 80; x++)
{
chr = m_p_videoram[x];
+ inv = (BIT(chr, 7) ^ ((cpos == m_curs_pos) && BIT(m_framecnt, 5))) ? 0xff : 0;
+ chr &= 0x7f;
if (ra < 8)
- gfx = m_p_chargen[(chr<<3) | ra ];
+ gfx = m_p_chargen[(chr<<3) | ra ] ^ inv;
else
- gfx = m_p_chargen[(chr<<3) | (ra&7) | 0x400];
+ gfx = m_p_chargen[(chr<<3) | (ra&7) | 0x400] ^ inv;
/* Display a scanline of a character */
*p++ = BIT(gfx, 0);
@@ -91,9 +140,12 @@ uint32_t jonos_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap,
*p++ = BIT(gfx, 5);
*p++ = BIT(gfx, 6);
*p++ = BIT(gfx, 7);
+ cpos++;
}
}
ma+=80;
+ if (ma > 0x77f)
+ ma -= 0x780;
}
return 0;
}
@@ -127,17 +179,17 @@ static MACHINE_CONFIG_START( jonos )
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_UPDATE_DRIVER(jonos_state, screen_update)
- MCFG_SCREEN_SIZE(640, 300)
- MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 299)
+ MCFG_SCREEN_SIZE(640, 288)
+ MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 287)
MCFG_SCREEN_PALETTE("palette")
MCFG_GFXDECODE_ADD("gfxdecode", "palette", jonos)
MCFG_PALETTE_ADD_MONOCHROME("palette")
+
+ MCFG_DEVICE_ADD("keyboard", GENERIC_KEYBOARD, 0)
+ MCFG_GENERIC_KEYBOARD_CB(PUT(jonos_state, kbd_put))
MACHINE_CONFIG_END
-DRIVER_INIT_MEMBER(jonos_state,jonos)
-{
-}
/* ROM definition */
ROM_START( jonos )
@@ -154,4 +206,4 @@ ROM_END
/* Driver */
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
-COMP( 198?, jonos, 0, 0, jonos, jonos, jonos_state, jonos, "Jonos", "Escort", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
+COMP( 198?, jonos, 0, 0, jonos, jonos, jonos_state, 0, "Jonos", "Escort", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)