summaryrefslogtreecommitdiffstats
path: root/src/devices/bus/apricot/expansion/winchester.cpp
diff options
context:
space:
mode:
authorGravatarGravatar Vas Crabb <vas@vastheman.com>2019-03-26 11:13:37 +1100
committerGravatarGravatar Vas Crabb <vas@vastheman.com>2019-03-26 11:13:37 +1100
commit97b67170277437131adf6ed4d60139c172529e4f (patch) (github)
tree7a5cbf608f191075f1612b1af15832c206a3fe2d /src/devices/bus/apricot/expansion/winchester.cpp
parentb380514764cf857469bae61c11143a19f79a74c5 (diff)
downloadmame-97b67170277437131adf6ed4d60139c172529e4f.tar.bz2
mame-97b67170277437131adf6ed4d60139c172529e4f.zip
(nw) Clean up the mess on master
This effectively reverts b380514764cf857469bae61c11143a19f79a74c5 and c24473ddff715ecec2e258a6eb38960cf8c8e98e, restoring the state at 598cd5227223c3b04ca31f0dbc1981256d9ea3ff. Before pushing, please check that what you're about to push is sane. Check your local commit log and ensure there isn't anything out-of-place before pushing to mainline. When things like this happen, it wastes everyone's time. I really don't need this in a week when real work™ is busting my balls and I'm behind where I want to be with preparing for MAME release.
Diffstat (limited to 'src/devices/bus/apricot/expansion/winchester.cpp')
-rw-r--r--src/devices/bus/apricot/expansion/winchester.cpp254
1 files changed, 254 insertions, 0 deletions
diff --git a/src/devices/bus/apricot/expansion/winchester.cpp b/src/devices/bus/apricot/expansion/winchester.cpp
new file mode 100644
index 00000000000..f16752b3ede
--- /dev/null
+++ b/src/devices/bus/apricot/expansion/winchester.cpp
@@ -0,0 +1,254 @@
+// license:GPL-2.0+
+// copyright-holders:Dirk Best
+/***************************************************************************
+
+ ACT Apricot Winchester Controller
+
+ Version Rev 9
+
+***************************************************************************/
+
+#include "emu.h"
+#include "winchester.h"
+#include "imagedev/harddriv.h"
+
+//#define LOG_GENERAL (1U << 0)
+#define LOG_REGS (1U << 1)
+#define LOG_DATA (1U << 2)
+
+//#define VERBOSE (LOG_REGS)
+//#define LOG_OUTPUT_STREAM std::cout
+
+#include "logmacro.h"
+
+#define LOGREGS(...) LOGMASKED(LOG_REGS, __VA_ARGS__)
+#define LOGDATA(...) LOGMASKED(LOG_DATA, __VA_ARGS__)
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(APRICOT_WINCHESTER, apricot_winchester_device, "apricot_winchester", "Apricot Winchester Controller Board")
+
+//-------------------------------------------------
+// regs - controller register i/o map
+//-------------------------------------------------
+
+void apricot_winchester_device::regs(address_map &map)
+{
+ map(0x0e0, 0x0ef).rw(m_hdc, FUNC(wd1010_device::read), FUNC(wd1010_device::write)).umask16(0x00ff);
+ map(0x1e0, 0x1e0).rw(FUNC(apricot_winchester_device::int_r), FUNC(apricot_winchester_device::head_w<0>)).umask16(0x00ff);
+ map(0x1e2, 0x1e2).w(FUNC(apricot_winchester_device::head_w<1>)).umask16(0x00ff);
+ map(0x1e4, 0x1e4).w(FUNC(apricot_winchester_device::head_w<2>)).umask16(0x00ff);
+ map(0x1e6, 0x1e6).w(FUNC(apricot_winchester_device::drive_w<0>)).umask16(0x00ff);
+ map(0x1e8, 0x1e8).w(FUNC(apricot_winchester_device::xferd_w)).umask16(0x00ff); // transferred
+ map(0x1ea, 0x1ea).w(FUNC(apricot_winchester_device::hbcr_w)).umask16(0x00ff); // host buffer clear register
+ map(0x1ec, 0x1ec).w(FUNC(apricot_winchester_device::clksel_w)).umask16(0x00ff); // buffer chip read/write clock select (host or wdc)
+ map(0x1ee, 0x1ee).w(FUNC(apricot_winchester_device::drive_w<1>)).umask16(0x00ff);
+ map(0x1f0, 0x1f0).rw(FUNC(apricot_winchester_device::data_r), FUNC(apricot_winchester_device::data_w)).umask16(0x00ff);
+}
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void apricot_winchester_device::device_add_mconfig(machine_config &config)
+{
+ WD1010(config, m_hdc, 5000000);
+ m_hdc->out_intrq_callback().set(FUNC(apricot_winchester_device::hdc_intrq_w));
+ m_hdc->in_data_callback().set(FUNC(apricot_winchester_device::hdc_data_r));
+ m_hdc->out_data_callback().set(FUNC(apricot_winchester_device::hdc_data_w));
+
+ HARDDISK(config, "hdc:0", 0);
+ HARDDISK(config, "hdc:1", 0);
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// apricot_winchester_device - constructor
+//-------------------------------------------------
+
+apricot_winchester_device::apricot_winchester_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ device_t(mconfig, APRICOT_WINCHESTER, tag, owner, clock),
+ device_apricot_expansion_card_interface(mconfig, *this),
+ m_hdc(*this, "hdc"),
+ m_ram_ptr(0),
+ m_int(0),
+ m_drive(0),
+ m_head(0),
+ m_hbcr(0),
+ m_clksel(0)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void apricot_winchester_device::device_start()
+{
+ // allocate 8-bit buffer ram (8k)
+ m_ram = std::make_unique<uint8_t[]>(0x2000);
+
+ // register for save states
+ save_pointer(NAME(m_ram), 0x2000);
+ save_item(NAME(m_ram_ptr));
+ save_item(NAME(m_int));
+ save_item(NAME(m_drive));
+ save_item(NAME(m_head));
+ save_item(NAME(m_hbcr));
+ save_item(NAME(m_clksel));
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void apricot_winchester_device::device_reset()
+{
+ m_bus->install_io_device(0x000, 0xfff, *this, &apricot_winchester_device::regs);
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION
+//**************************************************************************
+
+WRITE_LINE_MEMBER( apricot_winchester_device::hdc_intrq_w )
+{
+ LOGREGS("hdc_intrq_w: %d\n", state);
+
+ m_int = state;
+ m_bus->int2_w(state);
+}
+
+READ8_MEMBER( apricot_winchester_device::hdc_data_r )
+{
+ uint8_t data = 0xff;
+
+ if (m_clksel == 1)
+ {
+ LOGDATA("hdc_data_r[%04x]\n", m_ram_ptr);
+
+ data = m_ram[m_ram_ptr];
+ if (m_ram_ptr < 0x1fff)
+ m_ram_ptr++;
+ }
+
+ return data;
+}
+
+WRITE8_MEMBER( apricot_winchester_device::hdc_data_w )
+{
+ if (m_clksel == 1)
+ {
+ LOGDATA("hdc_data_w[%04x] = %02x\n", m_ram_ptr, data);
+
+ m_ram[m_ram_ptr] = data;
+ if (m_ram_ptr < 0x1fff)
+ m_ram_ptr++;
+ }
+}
+
+READ8_MEMBER( apricot_winchester_device::int_r )
+{
+ return m_int;
+}
+
+template<int N>
+WRITE8_MEMBER( apricot_winchester_device::head_w )
+{
+ m_head = (m_head & ~(1 << N)) | (BIT(data, 0) << N);
+ LOGREGS("Select head: %d\n", m_head);
+}
+
+template<int N>
+WRITE8_MEMBER( apricot_winchester_device::drive_w )
+{
+ m_drive = (m_drive & ~(1 << N)) | (BIT(data, 0) << N);
+ LOGREGS("Select drive: %d\n", m_drive);
+
+ // forward drive status to the hdc
+ harddisk_image_device *drive = nullptr;
+
+ switch (m_drive)
+ {
+ case 0:
+ drive = nullptr;
+ break;
+ case 1:
+ drive = m_hdc->subdevice<harddisk_image_device>("0");
+ break;
+ case 2:
+ drive = m_hdc->subdevice<harddisk_image_device>("1");
+ break;
+ case 3:
+ // both (invalid?)
+ drive = nullptr;
+ break;
+ }
+
+ m_hdc->drdy_w(drive != nullptr && drive->exists());
+}
+
+WRITE8_MEMBER( apricot_winchester_device::xferd_w )
+{
+ LOGREGS("xferd_w: %02x\n", data);
+
+ m_hdc->brdy_w(BIT(data, 0));
+}
+
+WRITE8_MEMBER( apricot_winchester_device::hbcr_w )
+{
+ LOGREGS("hbcr_w: %02x\n", data);
+
+ // reset ram pointer on high->low transition
+ if (m_hbcr == 1 && data == 0)
+ m_ram_ptr = 0;
+
+ m_hbcr = BIT(data, 0);
+}
+
+WRITE8_MEMBER( apricot_winchester_device::clksel_w )
+{
+ LOGREGS("clksel_w: %02x\n", data);
+
+ m_clksel = BIT(data, 0);
+}
+
+READ8_MEMBER( apricot_winchester_device::data_r )
+{
+ uint8_t data = 0xff;
+
+ if (m_clksel == 0)
+ {
+ LOGDATA("data_r[%04x]\n", m_ram_ptr);
+
+ data = m_ram[m_ram_ptr];
+
+ // wrap or stop at end?
+ if (m_ram_ptr < 0x1fff)
+ m_ram_ptr++;
+ }
+
+ return data;
+}
+
+WRITE8_MEMBER( apricot_winchester_device::data_w )
+{
+ if (m_clksel == 0)
+ {
+ LOGDATA("data_w[%04x] = %02x\n", m_ram_ptr, data);
+
+ m_ram[m_ram_ptr] = data;
+
+ // wrap or stop at end?
+ if (m_ram_ptr < 0x1fff)
+ m_ram_ptr++;
+ }
+}