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author Robbbert <Robbbert@users.noreply.github.com>2016-07-14 23:40:22 +1000
committer Robbbert <Robbbert@users.noreply.github.com>2016-07-14 23:40:22 +1000
commitd3dd9f8f95c5ebca51a691c7a6bc915a75276fd8 (patch)
tree68a41150fd2b20a25b7c10e1429557cf2632dd8c
parent3a21b0ed0e5f9d8d488e78486a1bc0e341e7d155 (diff)
TIM100: some work on fixing the display (nw)
-rw-r--r--src/mame/drivers/tim100.cpp165
1 files changed, 118 insertions, 47 deletions
diff --git a/src/mame/drivers/tim100.cpp b/src/mame/drivers/tim100.cpp
index d21b88dabb4..865c4ec6650 100644
--- a/src/mame/drivers/tim100.cpp
+++ b/src/mame/drivers/tim100.cpp
@@ -1,50 +1,68 @@
// license:BSD-3-Clause
-// copyright-holders:Miodrag Milanovic
-/***************************************************************************
+// copyright-holders:Miodrag Milanovic, Robbbert
+/********************************************************************************************************
- TIM-100 Terminal
- Mihajlo Pupin Institute
+TIM-100 Terminal
+Mihajlo Pupin Institute
- 21/12/2012 Skeleton driver.
+2012/12/21 Skeleton driver.
+2016/07/14 Fixed display etc [Robbbert]
-****************************************************************************/
+Notes:
+- Serial terminals appear to need 8 bits, 2 stop bits, odd parity @ 9600
+- Unable to set these settings as default, because std::bad_cast fatal error occurs at start
+- Unable to type anything as it seems uarts want BRKDET activated all the time, which we cannot do.
+- Unable to find any technical info at all, so it's all guesswork.
+
+*******************************************************************************************************/
#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "machine/i8251.h"
#include "video/i8275.h"
+#include "bus/rs232/rs232.h"
+#include "machine/clock.h"
class tim100_state : public driver_device
{
public:
tim100_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag),
- m_maincpu(*this, "maincpu"),
- m_palette(*this, "palette")
+ : driver_device(mconfig, type, tag)
+ , m_p_videoram(*this, "videoram")
+ , m_maincpu(*this, "maincpu")
+ , m_palette(*this, "palette")
+ , m_crtc(*this, "crtc")
+ , m_uart17(*this, "uart_u17")
+ , m_uart18(*this, "uart_u18")
{ }
- required_device<cpu_device> m_maincpu;
- required_device<palette_device> m_palette;
- virtual void machine_start() override;
- virtual void machine_reset() override;
+ WRITE_LINE_MEMBER(drq_w);
+ WRITE_LINE_MEMBER(irq_w);
+ WRITE_LINE_MEMBER(clock_w);
I8275_DRAW_CHARACTER_MEMBER( crtc_display_pixels );
private:
+ virtual void machine_start() override;
UINT8 *m_charmap;
+ UINT16 m_dma_adr;
+ required_shared_ptr<UINT8> m_p_videoram;
+ required_device<cpu_device> m_maincpu;
+ required_device<palette_device> m_palette;
+ required_device<i8275_device> m_crtc;
+ required_device<i8251_device> m_uart17;
+ required_device<i8251_device> m_uart18;
};
static ADDRESS_MAP_START(tim100_mem, AS_PROGRAM, 8, tim100_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x0000, 0x1fff) AM_ROM // 2764 at U16
- AM_RANGE(0x2000, 0x27ff) AM_RAM // 2KB static ram CDM6116A at U15
-
- AM_RANGE(0xc000, 0xc001) AM_DEVREADWRITE("i8276", i8275_device, read, write)
-
- AM_RANGE(0x6000, 0x6000) AM_DEVREADWRITE("uart_u17", i8251_device, status_r, control_w)
- AM_RANGE(0x6001, 0x6001) AM_DEVREADWRITE("uart_u17", i8251_device, data_r, data_w)
-
- AM_RANGE(0x8000, 0x8000) AM_DEVREADWRITE("uart_u18", i8251_device, status_r, control_w)
- AM_RANGE(0x8001, 0x8001) AM_DEVREADWRITE("uart_u18", i8251_device, data_r, data_w)
+ AM_RANGE(0x2000, 0x27ff) AM_RAM AM_SHARE("videoram") // 2KB static ram CDM6116A at U15
+ AM_RANGE(0x6000, 0x6000) AM_DEVREADWRITE("uart_u17", i8251_device, data_r, data_w)
+ AM_RANGE(0x6001, 0x6001) AM_DEVREADWRITE("uart_u17", i8251_device, status_r, control_w)
+ AM_RANGE(0x8000, 0x8000) AM_DEVREADWRITE("uart_u18", i8251_device, data_r, data_w)
+ AM_RANGE(0x8001, 0x8001) AM_DEVREADWRITE("uart_u18", i8251_device, status_r, control_w)
+ AM_RANGE(0xa000, 0xa000) AM_WRITENOP // continuously writes 00 here
+ AM_RANGE(0xc000, 0xc001) AM_DEVREADWRITE("crtc", i8275_device, read, write) // i8276
ADDRESS_MAP_END
static ADDRESS_MAP_START(tim100_io, AS_IO, 8, tim100_state)
@@ -57,6 +75,15 @@ ADDRESS_MAP_END
static INPUT_PORTS_START( tim100 )
INPUT_PORTS_END
+DEVICE_INPUT_DEFAULTS_START( tim100 )
+ DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_9600 )
+ DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_9600 )
+ DEVICE_INPUT_DEFAULTS( "RS232_STARTBITS", 0xff, RS232_STARTBITS_1 )
+ DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_7 )
+ DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_ODD )
+ DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_1 )
+DEVICE_INPUT_DEFAULTS_END
+
static const rgb_t tim100_palette[3] = {
rgb_t(0x00, 0x00, 0x00), // black
rgb_t(0xa0, 0xa0, 0xa0), // white
@@ -66,10 +93,6 @@ static const rgb_t tim100_palette[3] = {
void tim100_state::machine_start()
{
m_charmap = memregion("chargen")->base();
-}
-
-void tim100_state::machine_reset()
-{
m_palette->set_pen_colors(0, tim100_palette, ARRAY_LENGTH(tim100_palette));
}
@@ -90,34 +113,60 @@ static GFXDECODE_START( tim100 )
GFXDECODE_END
-// this gets called via a (i8275_dack_w), so does nothing currently
-// once fixed, pixel count needs adjusting
I8275_DRAW_CHARACTER_MEMBER( tim100_state::crtc_display_pixels )
{
- int i;
const rgb_t *palette = m_palette->palette()->entry_list_raw();
- UINT8 pixels = m_charmap[(linecount & 15) + (charcode << 4)];
- if (vsp)
+ UINT8 pixels;
+ for (UINT8 i = 0; i < 2; i++)
{
- pixels = 0;
+ pixels = m_charmap[(i * 0x1000) | (linecount & 15) | (charcode << 4)];
+ if (vsp)
+ pixels = 0;
+
+ if (lten)
+ pixels = 0xff;
+
+ if (rvv)
+ pixels ^= 0xff;
+
+ bitmap.pix32(y, x++) = palette[BIT(pixels, 7) ? (hlgt ? 2 : 1) : 0];
+ bitmap.pix32(y, x++) = palette[BIT(pixels, 6) ? (hlgt ? 2 : 1) : 0];
+ bitmap.pix32(y, x++) = palette[BIT(pixels, 5) ? (hlgt ? 2 : 1) : 0];
+ bitmap.pix32(y, x++) = palette[BIT(pixels, 4) ? (hlgt ? 2 : 1) : 0];
+ bitmap.pix32(y, x++) = palette[BIT(pixels, 3) ? (hlgt ? 2 : 1) : 0];
+ bitmap.pix32(y, x++) = palette[BIT(pixels, 2) ? (hlgt ? 2 : 1) : 0];
}
+}
- if (lten)
+WRITE_LINE_MEMBER( tim100_state::drq_w )
+{
+ if (state)
{
- pixels = 0xff;
+ address_space& mem = m_maincpu->space(AS_PROGRAM);
+ m_crtc->dack_w(mem, 0, m_p_videoram[m_dma_adr++]);
}
+}
- if (rvv)
+WRITE_LINE_MEMBER( tim100_state::irq_w )
+{
+ if (state)
{
- pixels ^= 0xff;
+ m_dma_adr = 2;
+ m_maincpu->set_input_line(I8085_RST65_LINE, HOLD_LINE);
}
+ else
+ m_maincpu->set_input_line(I8085_RST65_LINE, CLEAR_LINE);
+}
- for(i=0;i<8;i++) // 6 pixels
- {
- bitmap.pix32(y, x + i) = palette[(pixels >> (7-i)) & 1 ? (hlgt ? 2 : 1) : 0];
- }
+DECLARE_WRITE_LINE_MEMBER( tim100_state::clock_w )
+{
+ m_uart17->write_txc(state);
+ m_uart17->write_rxc(state);
+ m_uart18->write_txc(state);
+ m_uart18->write_rxc(state);
}
+
static MACHINE_CONFIG_START( tim100, tim100_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu",I8085A, XTAL_4_9152MHz) // divider unknown
@@ -126,28 +175,50 @@ static MACHINE_CONFIG_START( tim100, tim100_state )
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
- MCFG_SCREEN_UPDATE_DEVICE("i8276", i8275_device, screen_update)
+ MCFG_SCREEN_UPDATE_DEVICE("crtc", i8275_device, screen_update)
MCFG_SCREEN_REFRESH_RATE(50)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
- MCFG_SCREEN_SIZE(40*16, 16*16)
- MCFG_SCREEN_VISIBLE_AREA(0, 40*16-1, 0, 16*16-1)
+ MCFG_SCREEN_SIZE(40*12, 16*16)
+ MCFG_SCREEN_VISIBLE_AREA(0, 40*12-1, 0, 16*16-1)
MCFG_GFXDECODE_ADD("gfxdecode", "palette", tim100 )
- MCFG_DEVICE_ADD("i8276", I8275, XTAL_4_9152MHz)
- MCFG_I8275_CHARACTER_WIDTH(16)
+ MCFG_DEVICE_ADD("crtc", I8275, XTAL_4_9152MHz)
+ MCFG_I8275_CHARACTER_WIDTH(12)
MCFG_I8275_DRAW_CHARACTER_CALLBACK_OWNER(tim100_state, crtc_display_pixels)
- MCFG_I8275_IRQ_CALLBACK(INPUTLINE("maincpu", I8085_RST65_LINE))
+ MCFG_I8275_DRQ_CALLBACK(WRITELINE(tim100_state, drq_w))
+ MCFG_I8275_IRQ_CALLBACK(WRITELINE(tim100_state, irq_w))
+ MCFG_VIDEO_SET_SCREEN("screen")
MCFG_PALETTE_ADD("palette", 3)
MCFG_DEVICE_ADD("uart_u17", I8251, 0)
+ MCFG_I8251_TXD_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_txd))
+ MCFG_I8251_DTR_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_dtr))
+ MCFG_I8251_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts))
+ MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "keyboard")
+ MCFG_RS232_RXD_HANDLER(DEVWRITELINE("uart_u17", i8251_device, write_rxd))
+ MCFG_RS232_DSR_HANDLER(DEVWRITELINE("uart_u17", i8251_device, write_dsr))
+ MCFG_RS232_CTS_HANDLER(DEVWRITELINE("uart_u17", i8251_device, write_cts))
+
MCFG_DEVICE_ADD("uart_u18", I8251, 0)
+ MCFG_I8251_TXD_HANDLER(DEVWRITELINE("rs232a", rs232_port_device, write_txd))
+ MCFG_I8251_DTR_HANDLER(DEVWRITELINE("rs232a", rs232_port_device, write_dtr))
+ MCFG_I8251_RTS_HANDLER(DEVWRITELINE("rs232a", rs232_port_device, write_rts))
+ MCFG_RS232_PORT_ADD("rs232a", default_rs232_devices, "terminal") //"keyboard")
+ MCFG_RS232_RXD_HANDLER(DEVWRITELINE("uart_u18", i8251_device, write_rxd))
+ MCFG_RS232_DSR_HANDLER(DEVWRITELINE("uart_u18", i8251_device, write_dsr))
+ MCFG_RS232_CTS_HANDLER(DEVWRITELINE("uart_u18", i8251_device, write_cts))
+
+// MCFG_DEVICE_CARD_DEVICE_INPUT_DEFAULTS("keyboard", tim100 ) // gives std::bad_cast
+// MCFG_DEVICE_CARD_DEVICE_INPUT_DEFAULTS("terminal", tim100 ) // gives std::bad_cast
+ MCFG_DEVICE_ADD("uart_clock", CLOCK, 153600)
+ MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(tim100_state, clock_w))
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( tim100 )
- ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+ ROM_REGION( 0x2000, "maincpu", 0 )
ROM_LOAD( "tim 100 v.3.2.0.u16", 0x0000, 0x2000, CRC(4de9c8ad) SHA1(b0914d6e8d618e92a87b4b39c35391541251e8cc))
// The first and 2nd halves of these roms are identical, confirmed ok