IPC skeleton (nw)

scripts/target/mame/mess.lua

@@ -1623,7 +1623,8 @@ files {
 	MAME_DIR .. "src/mess/drivers/hp9845.c",    
 	MAME_DIR .. "src/mess/drivers/hp9k.c",      
 	MAME_DIR .. "src/mess/drivers/hp9k_3xx.c",  
-        MAME_DIR .. "src/mess/drivers/hp64k.c",
+	MAME_DIR .. "src/mess/drivers/hp64k.c",
+	MAME_DIR .. "src/mess/drivers/hp_ipc.c",
 }
 
 createMESSProjects(_target, _subtarget, "hec2hrp")

src/mame/mess.lst

@@ -2726,4 +2726,5 @@ bitgrpha
 bitgrphb
 tvgame
 aussieby
+hp_ipc
 

src/mess/drivers/hp_ipc.c

@@ -0,0 +1,160 @@
+// license:BSD-3-Clause
+// copyright-holders:
+/******************************************************************************
+
+HP Integral Personal Computer (IPC) skeleton driver 
+
+Interrupt levels:
+ 7 - Soft reset from keyboard
+ 6 - Real-time clock or NBIR3 (external)
+ 5 - Disc drive or NBIR2 (external)
+ 4 - GPU or NBIR1 (external)
+ 3 - HP-IB, printer, or NBIR0 (external)
+ 2 - HP-HIL devices (keyboard, mouse, etc)
+ 1 - Real-time clock
+
+******************************************************************************/
+
+#include "emu.h"
+#include "cpu/m68000/m68000.h"
+
+
+class hp_ipc_state : public driver_device
+{
+public:
+	hp_ipc_state(const machine_config &mconfig, device_type type, const char *tag)
+		: driver_device(mconfig, type, tag)
+		, m_maincpu(*this, "maincpu")
+	{ }
+
+	DECLARE_WRITE16_MEMBER(mmu_w);
+	DECLARE_READ16_MEMBER(ram_r);
+	DECLARE_WRITE16_MEMBER(ram_w);
+
+private:
+	required_device<m68000_device> m_maincpu;
+
+	UINT32 m_mmu[4];
+	UINT16 m_internal_ram[0x40000];
+
+	inline UINT32 get_ram_address(offs_t offset) { return (m_mmu[(m_maincpu->get_fc() >> 1) & 3] + offset) & 0x3FFFFF; }
+};
+
+
+/*
+Physical Address Map:
+ 000000 - 07FFFF Internal ROM (operating system PCA)
+ 080000 - 0FFFFF Internal ROM (option ROM PCA)
+ 100000 - 4FFFFF External ROM modules
+ 500000 - 5FFFFF Reserved
+ 600000 - 6FFFFF Internal I/O
+  600000 - 60FFFF MMU
+  610000 - 61FFFF Disc Drive
+  620000 - 62FFFF Display
+  630000 - 63FFFF HP-IB
+  640000 - 64FFFF Real-Time Clock
+  650000 - 65FFFF Printer
+  660000 - 66FFFF Keyboard
+  670000 - 67FFFF Speaker
+  680000 - 68FFFF Reserved
+  690000 - 69FFFF Reserved
+  6A0000 - 6AFFFF Reserved
+  6B0000 - 6BFFFF Reserved
+  6C0000 - 6CFFFF Reserved
+  6D0000 - 6DFFFF Reserved
+  6E0000 - 6EFFFF Reserved
+  6F0000 - 6FFFFF Reserved
+ 700000 - 7FFFFF External I/O
+  700000 - 70FFFF Mainframe Port A
+  710000 - 71FFFF Mainframe Port B
+  720000 - 72FFFF Bus Expander Port A1
+  730000 - 73FFFF Bus Expander Port A2
+  740000 - 74FFFF Bus Expander Port A3
+  750000 - 75FFFF Bus Expander Port A4
+  760000 - 76FFFF Bus Expander Port A5
+  770000 - 77FFFF Reserved
+  780000 - 78FFFF Reserved
+  790000 - 79FFFF Reserved
+  7A0000 - 7AFFFF Bus Expander Port B1
+  7B0000 - 7BFFFF Bus Expander Port B2
+  7C0000 - 7CFFFF Bus Expander Port B3
+  7D0000 - 7DFFFF Bus Expander Port B4
+  7E0000 - 7EFFFF Bus Expander Port B5
+  7F0000 - 7FFFFF Reserved
+ 800000 - EFFFFF External RAM modules
+ F00000 - F7FFFF Internal RAM
+ F80000 - FFFFFF Reserved
+
+All accesses to 800000-FFFFFF go through the "MMU" to form a final physical address
+
+*/
+static ADDRESS_MAP_START(hp_ipc_mem, AS_PROGRAM, 16, hp_ipc_state)
+	AM_RANGE(0x000000, 0x07FFFF) AM_ROM
+	AM_RANGE(0x600000, 0x60FFFF) AM_WRITE(mmu_w)
+	AM_RANGE(0x800000, 0xFFFFFF) AM_READWRITE(ram_r, ram_w)
+ADDRESS_MAP_END
+
+
+static INPUT_PORTS_START(hp_ipc)
+INPUT_PORTS_END
+
+
+WRITE16_MEMBER(hp_ipc_state::mmu_w)
+{
+	logerror("mmu_w: offset = %08x, data = %04x, register = %d, data_to_add = %08x\n", offset, data, offset & 3, (data & 0xFFF) << 10);
+	m_mmu[offset & 3] = (data & 0xFFF) << 10;
+}
+
+
+READ16_MEMBER(hp_ipc_state::ram_r)
+{
+	UINT32 ram_address = get_ram_address(offset);
+
+	//logerror("RAM read, offset = %08x, ram address = %08X\n", offset, ram_address);
+
+	if (ram_address < 0x380000)
+	{
+		// External RAM modules
+	}
+	else if (ram_address < 0x3c0000)
+	{
+		// Internal RAM
+		return m_internal_ram[offset & 0x3ffff];
+	}
+	return 0xffff;
+}
+
+
+WRITE16_MEMBER(hp_ipc_state::ram_w)
+{
+	UINT32 ram_address = get_ram_address(offset);
+
+	//logerror("RAM write, offset = %08x, ram address = %08X, data = %04x\n", offset, ram_address, data);
+
+	if (ram_address < 0x380000)
+	{
+		// External RAM modules
+	}
+	else if (ram_address < 0x3c0000)
+	{
+		// Internal RAM
+		m_internal_ram[offset & 0x3ffff] = data;
+	}
+}
+
+
+static MACHINE_CONFIG_START(hp_ipc, hp_ipc_state)
+	/* basic machine hardware */
+	MCFG_CPU_ADD("maincpu", M68000, 15920000 / 2)
+	MCFG_CPU_PROGRAM_MAP(hp_ipc_mem)
+MACHINE_CONFIG_END
+
+
+ROM_START(hp_ipc)
+	ROM_REGION(0x100000, "maincpu" , 0)
+	ROM_LOAD("hp ipc os 82991A.bin", 0x00000, 0x80000, BAD_DUMP CRC(df45a37b) SHA1(476af9923bca0d2d0f40aeb81be5145ca76fddf5)) // Should be spread across 4 x 128K ROMs
+ROM_END
+
+
+COMP(198?, hp_ipc, 0, 0, hp_ipc, hp_ipc, driver_device, 0, "HP", "Integral Personal Computer", MACHINE_IS_SKELETON)
+