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cdc721: Add banking and NVRAM (latter still fails test) (nw)

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This commit is contained in:
AJR 2018-03-25 13:46:18 -04:00
parent 865e573330
commit 6de01ea9b3
1 changed files with 76 additions and 9 deletions
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85
src/mame/drivers/cdc721.cpp
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@ -11,9 +11,10 @@ Control Data Corporation CDC 721 Terminal (Viking)
#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/bankdev.h"
#include "machine/i8255.h"
#include "machine/ins8250.h"
//#include "machine/nvram.h"
#include "machine/nvram.h"
#include "machine/z80ctc.h"
#include "video/tms9927.h"
#include "screen.h"
@ -25,8 +26,10 @@ public:
cdc721_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_bank_16k(*this, {"block0", "block4", "block8", "blockc"})
, m_p_chargen(*this, "chargen")
, m_p_videoram(*this, "videoram")
, m_p_nvram(*this, "nvram")
{ }
void cdc721(machine_config &config);
@ -37,9 +40,14 @@ private:
DECLARE_WRITE8_MEMBER(misc_w);
DECLARE_WRITE8_MEMBER(lights_w);
DECLARE_WRITE8_MEMBER(bank_select_w);
DECLARE_WRITE8_MEMBER(nvram_w);
void io_map(address_map &map);
void mem_map(address_map &map);
void block0_map(address_map &map);
void block4_map(address_map &map);
void block8_map(address_map &map);
void blockc_map(address_map &map);
virtual void machine_start() override;
virtual void machine_reset() override;
@ -47,8 +55,10 @@ private:
u8 m_flashcnt;
required_device<cpu_device> m_maincpu;
required_device_array<address_map_bank_device, 4> m_bank_16k;
required_region_ptr<u8> m_p_chargen;
required_shared_ptr<u8> m_p_videoram;
required_shared_ptr<u8> m_p_nvram;
};
WRITE8_MEMBER(cdc721_state::interrupt_mask_w)
@ -69,16 +79,49 @@ WRITE8_MEMBER(cdc721_state::lights_w)
WRITE8_MEMBER(cdc721_state::bank_select_w)
{
logerror("%s: Bank select = %02X\n", machine().describe_context(), data);
//membank("bankr0")->set_entry(BIT(data, 3));
for (int b = 0; b < 4; b++)
{
m_bank_16k[b]->set_bank(data & 3);
data >>= 2;
}
}
WRITE8_MEMBER(cdc721_state::nvram_w)
{
m_p_nvram[offset] = data & 0x0f;
}
void cdc721_state::mem_map(address_map &map)
{
map(0x0000, 0x3fff).rw("block0", FUNC(address_map_bank_device::read8), FUNC(address_map_bank_device::write8));
map(0x4000, 0x7fff).rw("block4", FUNC(address_map_bank_device::read8), FUNC(address_map_bank_device::write8));
map(0x8000, 0xbfff).rw("block8", FUNC(address_map_bank_device::read8), FUNC(address_map_bank_device::write8));
map(0xc000, 0xffff).rw("blockc", FUNC(address_map_bank_device::read8), FUNC(address_map_bank_device::write8));
}
void cdc721_state::block0_map(address_map &map)
{
map(0x0000, 0x3fff).rom().region("resident", 0);
map(0x4000, 0x7fff).rom().region("rompack", 0);
// AM_RANGE(0x0000, 0x4fff) AM_READ_BANK("bankr0") AM_WRITE_BANK("bankw0")
map(0x8000, 0xdfff).ram();
map(0xe000, 0xffff).ram().share("videoram");
map(0x8000, 0xbfff).ram();
}
void cdc721_state::block4_map(address_map &map)
{
map(0x0000, 0x00ff).ram().share("nvram").w(this, FUNC(cdc721_state::nvram_w));
map(0x0800, 0x0bff).ram();
map(0x8000, 0xbfff).rom().region("rompack", 0);
map(0xc000, 0xffff).ram();
}
void cdc721_state::block8_map(address_map &map)
{
map(0x4000, 0x7fff).ram();
}
void cdc721_state::blockc_map(address_map &map)
{
map(0x0000, 0x1fff).ram();
map(0x2000, 0x3fff).ram().share("videoram");
}
void cdc721_state::io_map(address_map &map)
@ -100,8 +143,8 @@ INPUT_PORTS_END
void cdc721_state::machine_reset()
{
// membank("bankr0")->set_entry(0);
// membank("bankw0")->set_entry(0);
for (auto &bank : m_bank_16k)
bank->set_bank(0);
}
void cdc721_state::machine_start()
@ -198,7 +241,31 @@ MACHINE_CONFIG_START(cdc721_state::cdc721)
MCFG_CPU_IO_MAP(io_map)
MCFG_Z80_DAISY_CHAIN(cdc721_daisy_chain)
//MCFG_NVRAM_0FILL_ADD("nvram") // MCM51L01C45 (256x4) + battery
MCFG_DEVICE_ADD("block0", ADDRESS_MAP_BANK, 0)
MCFG_DEVICE_ADDRESS_MAP(0, block0_map)
MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE)
MCFG_ADDRESS_MAP_BANK_DATA_WIDTH(8)
MCFG_ADDRESS_MAP_BANK_STRIDE(0x4000)
MCFG_DEVICE_ADD("block4", ADDRESS_MAP_BANK, 0)
MCFG_DEVICE_ADDRESS_MAP(0, block4_map)
MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE)
MCFG_ADDRESS_MAP_BANK_DATA_WIDTH(8)
MCFG_ADDRESS_MAP_BANK_STRIDE(0x4000)
MCFG_DEVICE_ADD("block8", ADDRESS_MAP_BANK, 0)
MCFG_DEVICE_ADDRESS_MAP(0, block8_map)
MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE)
MCFG_ADDRESS_MAP_BANK_DATA_WIDTH(8)
MCFG_ADDRESS_MAP_BANK_STRIDE(0x4000)
MCFG_DEVICE_ADD("blockc", ADDRESS_MAP_BANK, 0)
MCFG_DEVICE_ADDRESS_MAP(0, blockc_map)
MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE)
MCFG_ADDRESS_MAP_BANK_DATA_WIDTH(8)
MCFG_ADDRESS_MAP_BANK_STRIDE(0x4000)
MCFG_NVRAM_ADD_0FILL("nvram") // MCM51L01C45 (256x4) + battery
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)