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Diffstat (limited to 'src/devices/bus/a2bus/a2sd.cpp')
-rw-r--r--src/devices/bus/a2bus/a2sd.cpp68
1 files changed, 61 insertions, 7 deletions
diff --git a/src/devices/bus/a2bus/a2sd.cpp b/src/devices/bus/a2bus/a2sd.cpp
index e415ece84bc..14e6ad88c14 100644
--- a/src/devices/bus/a2bus/a2sd.cpp
+++ b/src/devices/bus/a2bus/a2sd.cpp
@@ -22,13 +22,18 @@
#include "emu.h"
#include "a2sd.h"
+#include "machine/at28c64b.h"
+#include "machine/spi_sdcard.h"
+
#define LOG_SPI (1U << 1)
-//#define VERBOSE (LOG_COMMAND)
+//#define VERBOSE (LOG_GENERAL)
#define LOG_OUTPUT_FUNC osd_printf_info
#include "logmacro.h"
+namespace {
+
/***************************************************************************
PARAMETERS
***************************************************************************/
@@ -41,17 +46,56 @@ static constexpr u8 C0N1_TC = 0x80; // SPI transfer complete
static constexpr u8 C0N3_CD = 0x40; // card detect
static constexpr u8 C0N3_BIT_SS = 7;
-//**************************************************************************
-// GLOBAL VARIABLES
-//**************************************************************************
-
-DEFINE_DEVICE_TYPE(A2BUS_A2SD, a2bus_a2sd_device, "a2sd", "Apple II SD Card")
-
ROM_START( a2sd )
ROM_REGION(0x2000, "flash", ROMREGION_ERASE00)
ROM_LOAD( "appleiisd.bin", 0x000000, 0x000800, CRC(e82eea8a) SHA1(7e0acef01e622eeed6f8e87893d07c701bbef016) )
ROM_END
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class a2bus_a2sd_device:
+ public device_t,
+ public device_a2bus_card_interface
+{
+public:
+ // construction/destruction
+ a2bus_a2sd_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ a2bus_a2sd_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+
+ virtual void device_start() override ATTR_COLD;
+ virtual void device_reset() override ATTR_COLD;
+ virtual void device_add_mconfig(machine_config &config) override ATTR_COLD;
+ virtual const tiny_rom_entry *device_rom_region() const override ATTR_COLD;
+
+ // overrides of standard a2bus slot functions
+ virtual u8 read_c0nx(u8 offset) override;
+ virtual void write_c0nx(u8 offset, u8 data) override;
+ virtual u8 read_cnxx(u8 offset) override;
+ virtual void write_cnxx(u8 offset, u8 data) override;
+ virtual u8 read_c800(uint16_t offset) override;
+ virtual void write_c800(uint16_t offset, u8 data) override;
+
+ // SPI 4-wire interface
+ void spi_miso_w(int state) { m_in_bit = state; }
+
+ TIMER_CALLBACK_MEMBER(shift_tick);
+
+private:
+ required_device<at28c64b_device> m_flash;
+ required_device<spi_sdcard_device> m_sdcard;
+
+ u8 m_datain, m_in_latch, m_out_latch;
+ u8 m_c0n1, m_c0n3;
+ int m_in_bit;
+
+ int m_shift_count;
+ emu_timer *m_shift_timer;
+};
+
/***************************************************************************
FUNCTION PROTOTYPES
***************************************************************************/
@@ -64,6 +108,7 @@ void a2bus_a2sd_device::device_add_mconfig(machine_config &config)
AT28C64B(config, m_flash, 0);
SPI_SDCARD(config, m_sdcard, 0);
+ m_sdcard->set_prefer_sdhc();
m_sdcard->spi_miso_callback().set(FUNC(a2bus_a2sd_device::spi_miso_w));
}
@@ -277,3 +322,12 @@ void a2bus_a2sd_device::write_c800(u16 offset, u8 data)
{
m_flash->write(offset + 0x100, data);
}
+
+} // anonymous namespace
+
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE_PRIVATE(A2BUS_A2SD, device_a2bus_card_interface, a2bus_a2sd_device, "a2sd", "Apple II SD Card")