Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-05-12 00:58:53 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

fs3216: A very preliminary MMU (nw)

Browse Source
This commit is contained in:
AJR 2018-12-27 22:11:13 -05:00
parent 6aa1dbe27d
commit 006d232e69
1 changed files with 92 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

106
src/mame/drivers/fs3216.cpp
View File

@ -13,6 +13,7 @@
#include "cpu/m68000/m68000.h"
#include "cpu/8x300/8x300.h"
//#include "imagedev/floppy.h"
#include "machine/bankdev.h"
//#include "machine/com8116.h"
#include "machine/upd765.h"
#include "machine/x2212.h"
@ -28,6 +29,7 @@ public:
fs3216_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_clb(*this, "clb")
, m_ctc(*this, "ctc")
, m_fdc(*this, "fdc")
, m_earom(*this, "earom")
@ -38,10 +40,16 @@ public:
protected:
virtual void machine_start() override;
virtual void machine_reset() override;
private:
MC6845_UPDATE_ROW(update_row);
DECLARE_READ16_MEMBER(mmu_read);
DECLARE_WRITE16_MEMBER(mmu_write);
DECLARE_WRITE_LINE_MEMBER(mmu_reset_w);
void mmu_init_w(u16 data);
DECLARE_READ8_MEMBER(ctc_r);
DECLARE_WRITE8_MEMBER(ctc_w);
void floppy_select_w(u8 data);
@ -53,15 +61,20 @@ private:
u16 earom_store_r();
void main_map(address_map &map);
void clb_map(address_map &map);
void wdcpu_prog_map(address_map &map);
void wdcpu_bank_map(address_map &map);
required_device<cpu_device> m_maincpu;
required_device<m68000_device> m_maincpu;
required_device<address_map_bank_device> m_clb;
required_device<z80ctc_device> m_ctc;
required_device<upd765a_device> m_fdc;
required_device<x2212_device> m_earom;
std::unique_ptr<u8[]> m_fdc_ram;
bool m_in_reset;
bool m_mmu_init;
};
@ -69,6 +82,18 @@ void fs3216_state::machine_start()
{
m_fdc_ram = make_unique_clear<u8[]>(0x400);
save_pointer(NAME(m_fdc_ram), 0x400);
save_item(NAME(m_in_reset));
save_item(NAME(m_mmu_init));
}
void fs3216_state::machine_reset()
{
m_in_reset = true;
m_mmu_init = false;
// FIXME: fix the 68000 so that it doesn't read vectors during device_reset
m_maincpu->reset();
}
@ -77,6 +102,48 @@ MC6845_UPDATE_ROW(fs3216_state::update_row)
}
READ16_MEMBER(fs3216_state::mmu_read)
{
if (m_in_reset)
{
if (m_mmu_init && !BIT(offset, 22) && !machine().side_effects_disabled())
m_in_reset = false;
else
offset = (offset & 0x03ffff) | 0x1c0000;
}
// TODO: MMU segments
return m_clb->read16(space, offset & 0x1fffff, mem_mask);
}
WRITE16_MEMBER(fs3216_state::mmu_write)
{
if (m_in_reset)
{
if (m_mmu_init && !BIT(offset, 22) && !machine().side_effects_disabled())
m_in_reset = false;
else
offset = (offset & 0x03ffff) | 0x1c0000;
}
// TODO: MMU segments
m_clb->write16(space, offset & 0x1fffff, data, mem_mask);
}
WRITE_LINE_MEMBER(fs3216_state::mmu_reset_w)
{
if (state)
{
m_in_reset = true;
m_mmu_init = false;
}
}
void fs3216_state::mmu_init_w(u16 data)
{
m_mmu_init = true;
}
READ8_MEMBER(fs3216_state::ctc_r)
{
return m_ctc->read(space, offset >> 1);
@ -134,23 +201,27 @@ void fs3216_state::fdc_ram_w(offs_t offset, u8 data)
void fs3216_state::main_map(address_map &map)
{
map(0x000000, 0x003fff).rom().region("bios", 0);
map(0x015000, 0x017fff).ram();
map(0x000000, 0xffffff).rw(FUNC(fs3216_state::mmu_read), FUNC(fs3216_state::mmu_write));
}
void fs3216_state::clb_map(address_map &map)
{
map(0x000000, 0x017fff).ram();
map(0x380000, 0x383fff).rom().region("momrom", 0);
map(0x392000, 0x392003).m(m_fdc, FUNC(upd765a_device::map)).umask16(0x00ff);
map(0x392041, 0x392041).w(FUNC(fs3216_state::floppy_select_w));
map(0x392051, 0x392051).r(FUNC(fs3216_state::floppy_status_r));
map(0x394680, 0x39468f).rw(FUNC(fs3216_state::ctc_r), FUNC(fs3216_state::ctc_w)).umask16(0x00ff);
map(0x394701, 0x394701).rw("dart", FUNC(z80dart_device::da_r), FUNC(z80dart_device::da_w));
map(0x394709, 0x394709).rw("dart", FUNC(z80dart_device::ca_r), FUNC(z80dart_device::ca_w));
map(0x394711, 0x394711).rw("dart", FUNC(z80dart_device::db_r), FUNC(z80dart_device::db_w));
map(0x394719, 0x394719).rw("dart", FUNC(z80dart_device::cb_r), FUNC(z80dart_device::cb_w));
map(0x780000, 0x783fff).rom().region("bios", 0);
map(0x792000, 0x792003).m(m_fdc, FUNC(upd765a_device::map)).umask16(0x00ff);
map(0x792041, 0x792041).w(FUNC(fs3216_state::floppy_select_w));
map(0x792051, 0x792051).r(FUNC(fs3216_state::floppy_status_r));
map(0x7f6000, 0x7f6001).w(FUNC(fs3216_state::fdc_reset_w));
map(0x7f6800, 0x7f6fff).rw(FUNC(fs3216_state::fdc_ram_r), FUNC(fs3216_state::fdc_ram_w)).umask16(0x00ff);
map(0x7f7000, 0x7f7001).r(FUNC(fs3216_state::earom_recall_r));
map(0x7f7200, 0x7f7201).r(FUNC(fs3216_state::earom_store_r));
map(0x7f7400, 0x7f75ff).rw(m_earom, FUNC(x2212_device::read), FUNC(x2212_device::write)).umask16(0x00ff);
map(0x800000, 0x803fff).rom().region("bios", 0);
map(0x3f5000, 0x3f5001).w(FUNC(fs3216_state::mmu_init_w));
map(0x3f6000, 0x3f6001).w(FUNC(fs3216_state::fdc_reset_w));
map(0x3f6800, 0x3f6fff).rw(FUNC(fs3216_state::fdc_ram_r), FUNC(fs3216_state::fdc_ram_w)).umask16(0x00ff);
map(0x3f7000, 0x3f7001).r(FUNC(fs3216_state::earom_recall_r));
map(0x3f7200, 0x3f7201).r(FUNC(fs3216_state::earom_store_r));
map(0x3f7400, 0x3f75ff).rw(m_earom, FUNC(x2212_device::read), FUNC(x2212_device::write)).umask16(0x00ff);
}
void fs3216_state::wdcpu_prog_map(address_map &map)
@ -168,6 +239,13 @@ void fs3216_state::fs3216(machine_config &config)
{
M68000(config, m_maincpu, 44.2368_MHz_XTAL / 8); // 5.5 MHz
m_maincpu->set_addrmap(AS_PROGRAM, &fs3216_state::main_map);
m_maincpu->set_reset_callback(write_line_delegate(FUNC(fs3216_state::mmu_reset_w), this));
ADDRESS_MAP_BANK(config, m_clb);
m_clb->set_addrmap(0, &fs3216_state::clb_map);
m_clb->set_data_width(16);
m_clb->set_addr_width(24);
m_clb->set_endianness(ENDIANNESS_BIG);
Z80CTC(config, m_ctc, 44.2368_MHz_XTAL / 8); // Z8430BPS
m_ctc->set_clk<0>(44.2368_MHz_XTAL / 16); // CLK0 rate guessed
@ -207,7 +285,7 @@ INPUT_PORTS_END
// XTALs on Video Controller board (1000443-1 Rev. I): 14.580 MHz (1H)
// XTALs on WD-1001 CLB Disk Controller board (1473-008): 20.000 (Y1), 8.00? [somewhat defaced] (Y2)
ROM_START(fs3216)
ROM_REGION16_BE(0x4000, "bios", 0)
ROM_REGION16_BE(0x4000, "momrom", 0)
ROM_LOAD16_BYTE("17k_1260-02_h.bin", 0x0000, 0x2000, CRC(75ed6de8) SHA1(0360548493b778995ae436da475b6356945e1872))
ROM_LOAD16_BYTE("15k_1260-01_l.bin", 0x0001, 0x2000, CRC(82695233) SHA1(0d69309f41306298bf6a4ba6928c53f908bb3f2c))