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Diffstat (limited to 'src/mame/drivers/ncd88k.cpp')
-rw-r--r--src/mame/drivers/ncd88k.cpp172
1 files changed, 166 insertions, 6 deletions
diff --git a/src/mame/drivers/ncd88k.cpp b/src/mame/drivers/ncd88k.cpp
index 2673df0928d..11716f6c30f 100644
--- a/src/mame/drivers/ncd88k.cpp
+++ b/src/mame/drivers/ncd88k.cpp
@@ -5,10 +5,32 @@
Skeleton driver for MC88100-based NCD X terminals.
****************************************************************************/
+/*
+ * WIP notes
+ *
+ * 88k "base" (19c, 19g, 17cr, 19cp)
+ * - https://web-docs.gsi.de/~kraemer/COLLECTION/ftp.ncd.com/pub/ncd/Archive/NCD-Articles/NCD_X_Terminals/Memory_specs/NCD_88k_family_memory_specs
+ *
+ * MCX
+ * - 2MB code and 4MB data memory on motherboard
+ * - J10 SIMM slot for code, J11/J12 for data
+ * - Code memory can be added as 256Kx32, 512Kx32, 1Mx32, 2Mx32, 4Mx32,
+ * or 8Mx32 SIMMs. Data memory can be added as 1Mx32, 2Mx32, 4Mx32,
+ * or 8Mx32 SIMMs.
+ * - 256Kx32 and 512Kx32 SIMMs are only supported as code memory
+ *
+ */
#include "emu.h"
#include "cpu/m88000/m88000.h"
#include "machine/mc68681.h"
+#include "machine/am79c90.h"
+#include "machine/eepromser.h"
+
+#include "bus/rs232/rs232.h"
+
+#include "video/bt45x.h"
+#include "video/bt47x.h"
#include "screen.h"
class ncd88k_state : public driver_device
@@ -18,6 +40,8 @@ public:
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_screen(*this, "screen")
+ , m_ramdac(*this, "ramdac")
+ , m_vram(*this, "vram")
{
}
@@ -31,27 +55,50 @@ private:
required_device<cpu_device> m_maincpu;
required_device<screen_device> m_screen;
+ required_device<bt458_device> m_ramdac;
+
+ required_shared_ptr<u32> m_vram;
};
u32 ncd88k_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
+ u32 *pixel_pointer = m_vram;
+
+ for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++)
+ {
+ for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x += 4)
+ {
+ u32 const pixel_data = *pixel_pointer++;
+
+ bitmap.pix(y, x + 0) = m_ramdac->pen_color(u8(pixel_data >> 24));
+ bitmap.pix(y, x + 1) = m_ramdac->pen_color(u8(pixel_data >> 16));
+ bitmap.pix(y, x + 2) = m_ramdac->pen_color(u8(pixel_data >> 8));
+ bitmap.pix(y, x + 3) = m_ramdac->pen_color(u8(pixel_data >> 0));
+ }
+
+ // compensate by 2048 - 1280 pixels per line
+ pixel_pointer += 0xc0;
+ }
+
return 0;
}
void ncd88k_state::code_map(address_map &map)
{
map(0x00000000, 0x0001cfff).rom().region("program", 0);
- map(0x04000000, 0x07ffffff).ram().share("mainram");
+ map(0x04000000, 0x07ffffff).ram().share("coderam");
}
void ncd88k_state::data_map(address_map &map)
{
map(0x00000000, 0x0001cfff).rom().region("program", 0);
map(0x01000000, 0x0100003f).rw("duart", FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask32(0xff000000);
- map(0x01400000, 0x01400007).nopw(); // RAMDAC?
- map(0x04000000, 0x07ffffff).ram().share("mainram");
- map(0x08000000, 0x0803ffff).ram();
- map(0x0e000000, 0x0e1fffff).ram();
+ map(0x01400000, 0x0140001f).m(m_ramdac, FUNC(bt458_device::map)).umask32(0xff000000);
+
+ map(0x04000000, 0x07ffffff).ram().share("coderam");
+ map(0x08000000, 0x0d03ffff).ram().share("dataram");
+
+ map(0x0e000000, 0x0e1fffff).ram().share("vram");
}
static INPUT_PORTS_START(ncd19c)
@@ -65,6 +112,8 @@ void ncd88k_state::ncd19c(machine_config &config)
SCN2681(config, "duart", 3'686'400);
+ BT458(config, m_ramdac, 0);
+
SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
m_screen->set_raw(125'000'000, 1680, 0, 1280, 1063, 0, 1024); // 74.4 kHz horizontal, 70 Hz vertical
m_screen->set_screen_update(FUNC(ncd88k_state::screen_update));
@@ -77,4 +126,115 @@ ROM_START(ncd19c)
ROM_LOAD16_BYTE("ncd19c-o.rom", 0x0001, 0xb000, CRC(dfd9be7c) SHA1(2e99a325b039f8c3bb89833cd1940e6737b64d79) BAD_DUMP)
ROM_END
-COMP(1990, ncd19c, 0, 0, ncd19c, ncd19c, ncd88k_state, empty_init, "Network Computing Devices", "NCD19c", MACHINE_IS_SKELETON)
+class ncdmcx_state : public driver_device
+{
+public:
+ ncdmcx_state(machine_config const &mconfig, device_type type, char const *tag)
+ : driver_device(mconfig, type, tag)
+ , m_cpu(*this, "cpu")
+ , m_eeprom(*this, "eeprom")
+ , m_lance(*this, "lance")
+ , m_duart(*this, "duart")
+ , m_ramdac(*this, "ramdac")
+ , m_screen(*this, "screen")
+ , m_vram(*this, "vram")
+ {
+ }
+
+ void ncdmcx(machine_config &config);
+
+private:
+ u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, rectangle const &cliprect);
+
+ void code_map(address_map &map);
+ void data_map(address_map &map);
+
+ required_device<cpu_device> m_cpu;
+ required_device<eeprom_serial_93cxx_device> m_eeprom;
+ required_device<am79c90_device> m_lance;
+ required_device<scn2681_device> m_duart;
+ required_device<bt477_device> m_ramdac;
+ required_device<screen_device> m_screen;
+
+ required_shared_ptr<u32> m_vram;
+};
+
+u32 ncdmcx_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, rectangle const &cliprect)
+{
+ u32 *pixel_pointer = m_vram;
+
+ for (int y = screen.visible_area().min_y; y <= screen.visible_area().max_y; y++)
+ {
+ for (int x = screen.visible_area().min_x; x <= screen.visible_area().max_x; x += 4)
+ {
+ u32 const pixel_data = *pixel_pointer++;
+
+ bitmap.pix(y, x + 0) = m_ramdac->pen_color(u8(pixel_data >> 24));
+ bitmap.pix(y, x + 1) = m_ramdac->pen_color(u8(pixel_data >> 16));
+ bitmap.pix(y, x + 2) = m_ramdac->pen_color(u8(pixel_data >> 8));
+ bitmap.pix(y, x + 3) = m_ramdac->pen_color(u8(pixel_data >> 0));
+ }
+
+ // compensate by 2048 - 1280 pixels per line
+ pixel_pointer += 0xc0;
+ }
+
+ return 0;
+}
+
+void ncdmcx_state::ncdmcx(machine_config &config)
+{
+ MC88100(config, m_cpu, 80_MHz_XTAL / 4);
+ m_cpu->set_addrmap(AS_PROGRAM, &ncdmcx_state::code_map);
+ m_cpu->set_addrmap(AS_DATA, &ncdmcx_state::data_map);
+
+ // CAT35C104P 256x16 or 512x8 4K-Bit SERIAL E2PROM
+ EEPROM_93C66_8BIT(config, m_eeprom);
+
+ // ICD2061ASC-1
+
+ // 4100004
+ AM79C90(config, m_lance, 20_MHz_XTAL);
+
+ SCN2681(config, m_duart, 3'686'400);
+
+ // ATT20C497-11
+ BT477(config, m_ramdac, 125'000'000);
+
+ SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
+ m_screen->set_raw(125'000'000, 1680, 0, 1280, 1063, 0, 1024); // 74.4 kHz horizontal, 70 Hz vertical
+ m_screen->set_screen_update(FUNC(ncdmcx_state::screen_update));
+}
+
+void ncdmcx_state::code_map(address_map &map)
+{
+ map(0x00000000, 0x0003ffff).rom().region("program", 0);
+
+ map(0x04000000, 0x07ffffff).ram().share("coderam");
+}
+
+void ncdmcx_state::data_map(address_map &map)
+{
+ map(0x00000000, 0x0003ffff).rom().region("program", 0);
+
+ map(0x01000000, 0x0100003f).rw(m_duart, FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask32(0xff000000);
+ map(0x01400000, 0x0140001f).m(m_ramdac, FUNC(bt477_device::map)).umask32(0xff000000);
+
+ // bit 0 -> icd2061a clock
+ // bit 1 -> icd2016a data
+ map(0x01580000, 0x01580003).nopw();
+
+ map(0x04000000, 0x07ffffff).ram().share("coderam"); // maximum 64M
+ map(0x08000000, 0x0dffffff).ram().share("dataram"); // maximum 96M
+
+ map(0x0e000000, 0x0e3fffff).ram().share("vram");
+}
+
+ROM_START(ncdmcx)
+ ROM_REGION32_BE(0x40000, "program", 0)
+ ROM_LOAD16_BYTE("ncd88k_mcx_bm.u3", 0x0000, 0x20000, CRC(70305680) SHA1(b10b250fe319e823cff28ba7b449b0a40755f5a2))
+ ROM_LOAD16_BYTE("ncd88k_mcx_bm.u14", 0x0001, 0x20000, CRC(fc066464) SHA1(fa894de56b77bd4bc619040a2cf3a0d260914727))
+ROM_END
+
+COMP(1990, ncd19c, 0, 0, ncd19c, ncd19c, ncd88k_state, empty_init, "Network Computing Devices", "19c", MACHINE_IS_SKELETON)
+COMP(1990, ncdmcx, 0, 0, ncdmcx, 0, ncdmcx_state, empty_init, "Network Computing Devices", "MCX", MACHINE_IS_SKELETON)