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Merged
merged 2 commits into from
Jan 1, 2017
Merged

t4426: Added cart pia and started banking (nw) #1902

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424ec5c
first stab at cart PIA and the ROM banking (nw)
JoakimLarsson Jan 1, 2017
d0c0e15
Updated the LOG mechanism
JoakimLarsson Jan 1, 2017
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117 changes: 98 additions & 19 deletions src/devices/bus/coco/coco_t4426.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
// copyright-holders:Joakim Larsson Edstrom
/***************************************************************************
*
* coco_t4426.c
* coco_t4426.cpp
*
* Terco T4426 CNC Programming Station multi cart
*
Expand Down Expand Up @@ -46,14 +46,16 @@
#define LOG_GENERAL 0x01
#define LOG_SETUP 0x02
#define LOG_PRINTF 0x04
#define LOG_PIA 0x08

#define VERBOSE 0 // (LOG_PRINTF | LOG_SETUP | LOG_GENERAL)
#define VERBOSE 0 //(LOG_PIA | LOG_PRINTF | LOG_SETUP | LOG_GENERAL)

#define LOGMASK(mask, ...) do { if (VERBOSE & mask) logerror(__VA_ARGS__); } while (0)
#define LOGLEVEL(mask, level, ...) do { if ((VERBOSE & mask) >= level) logerror(__VA_ARGS__); } while (0)

#define LOG(...) LOGMASK(LOG_GENERAL, __VA_ARGS__)
#define LOGSETUP(...) LOGMASK(LOG_SETUP, __VA_ARGS__)
#define LOGPIA(...) LOGMASK(LOG_PIA, __VA_ARGS__)

#if VERBOSE & LOG_PRINTF
#define logerror printf
Expand All @@ -77,19 +79,34 @@
IMPLEMENTATION
***************************************************************************/

// TODO: Figure out address mapping for these devices
static MACHINE_CONFIG_FRAGMENT(coco_t4426)
MCFG_DEVICE_ADD(UART_TAG, ACIA6850, 0)
MCFG_DEVICE_ADD(UART_TAG, ACIA6850, 0) // TODO: Figure out address mapping for ACIA
MCFG_DEVICE_ADD(PIA_TAG, PIA6821, 0)
MCFG_PIA_WRITEPA_HANDLER(WRITE8(coco_t4426_device, pia_A_w))
MACHINE_CONFIG_END

ROM_START( coco_t4426 )
ROM_REGION(0x8000, CARTSLOT_TAG, ROMREGION_ERASE00)
// First of 8 banked ROM:s TODO: Add the banking and the other ROM:s
ROM_LOAD("tercoED4426-0-8549-5.3.bin", 0x0000, 0x2000, CRC(45665428) SHA1(ff49a79275772c4c4ab1ae29db662c9b10a744a7))

ROM_REGION(0x1a000, CARTSLOT_TAG, ROMREGION_ERASE00)

// 8 banked ROM:s TODO: Add the banking and the other ROM:s
ROM_LOAD("tercoED4426-0-8549-5.3.bin", 0x00000, 0x2000, CRC(45665428) SHA1(ff49a79275772c4c4ab1ae29db662c9b10a744a7))
ROM_LOAD("tercoED4426-1-8549-5.3.bin", 0x03000, 0x2000, CRC(44baba33) SHA1(01cee1b208c158e598e7ecd2189b5e0ffa7f3ab9))
ROM_LOAD("tercoPD4426-2-8632-6.4.bin", 0x06000, 0x2000, CRC(258e443a) SHA1(9d8901f3e70ae4f8526dde1b5208b22f066f801f))
ROM_LOAD("tercoPD4426-3-8638-6.4.bin", 0x09000, 0x2000, CRC(640d1de4) SHA1(5ae7427cb5729fd3920361855d954ea1f97f6ae5))
ROM_LOAD("tercoCA4426-4-8549-3.4.bin", 0x0c000, 0x2000, CRC(df18397b) SHA1(2f9de210c039619c649be223c37a4eff873fa600))
ROM_LOAD("tercoCA4426-5-8549-3.4.bin", 0x0f000, 0x2000, CRC(3fcdf92e) SHA1(ec1589f8d62701ca3faf2a85a57ab2e1f61d2137))
ROM_LOAD("tercoCA4426-6-8549-3.4.bin", 0x13000, 0x2000, CRC(27652ccf) SHA1(529a6f736666ae6660483e547d076725606b1c1d))
ROM_LOAD("tercoCA4426-7-8549-3.4.bin", 0x16000, 0x2000, CRC(f6640569) SHA1(03f70dcc5f7ab60cd908427d45ebd85b6f464b93))
// Main cartridge ROM
ROM_LOAD("tercoPMOS4426-8549-4.31.bin", 0x2000, 0x1000, CRC(bc65c45c) SHA1(e50cfd1d61e29fe05eb795d8bf6303e7b91ed8e5))
// Interleaved copies for the fixed ROM for banking to work (nw yet though)
ROM_RELOAD(0x05000,0x1000)
ROM_RELOAD(0x08000,0x1000)
ROM_RELOAD(0x0b000,0x1000)
ROM_RELOAD(0x0e000,0x1000)
ROM_RELOAD(0x12000,0x1000)
ROM_RELOAD(0x15000,0x1000)
ROM_RELOAD(0x18000,0x1000)
ROM_END

//**************************************************************************
Expand All @@ -111,6 +128,7 @@ coco_t4426_device::coco_t4426_device(const machine_config &mconfig, device_type
,device_cococart_interface( mconfig, *this )
,m_cart(nullptr)
,m_owner(nullptr)
,m_select(0)
,m_autostart(*this, ":" CART_AUTOSTART_TAG)
,m_uart(*this, UART_TAG)
,m_pia(*this, PIA_TAG)
Expand All @@ -122,6 +140,7 @@ coco_t4426_device::coco_t4426_device(const machine_config &mconfig, const char *
,device_cococart_interface( mconfig, *this )
,m_cart(nullptr)
,m_owner(nullptr)
,m_select(0)
,m_autostart(*this, ":" CART_AUTOSTART_TAG)
,m_uart(*this, UART_TAG)
,m_pia(*this, PIA_TAG)
Expand All @@ -134,6 +153,7 @@ coco_t4426_device::coco_t4426_device(const machine_config &mconfig, const char *

void coco_t4426_device::device_start()
{
LOG("%s()\n", FUNCNAME );
m_cart = dynamic_cast<device_image_interface *>(owner());
m_owner = dynamic_cast<cococart_slot_device *>(owner());
}
Expand All @@ -145,6 +165,7 @@ void coco_t4426_device::device_start()

machine_config_constructor coco_t4426_device::device_mconfig_additions() const
{
LOG("%s()\n", FUNCNAME );
return MACHINE_CONFIG_NAME( coco_t4426 );
}

Expand All @@ -154,6 +175,7 @@ machine_config_constructor coco_t4426_device::device_mconfig_additions() const

const tiny_rom_entry *coco_t4426_device::device_rom_region() const
{
LOG("%s()\n", FUNCNAME );
return ROM_NAME( coco_t4426 );
}

Expand All @@ -163,39 +185,96 @@ const tiny_rom_entry *coco_t4426_device::device_rom_region() const

void coco_t4426_device::device_reset()
{
LOG("%s()\n", FUNCNAME );
auto cart_line = cococart_slot_device::line_value::Q;
m_owner->cart_set_line(cococart_slot_device::line::CART, cart_line);
}

/*-------------------------------------------------
get_cart_base
-------------------------------------------------*/

uint8_t* coco_t4426_device::get_cart_base()
{
return memregion(CARTSLOT_TAG)->base();
}

/*-------------------------------------------------
read
The 4426 cartridge PIA is located at ff44-ff47
-------------------------------------------------*/

READ8_MEMBER(coco_t4426_device::read)
{
uint8_t result = 0x00;

LOG("%s()\n", FUNCNAME);
LOGSETUP(" * Offs:%02x -> %02x\n", offset, result);
LOG("%s", FUNCNAME);

if ((offset >= 0x04) && (offset <= 0x07))
result = m_pia->read(space, offset - 0x04);

LOG(" - Offs:%04x Data:%02x\n", offset, result);
return result;
}

/*-------------------------------------------------
write
The 4426 cartridge PIA is located at ff44-ff47
-------------------------------------------------*/

WRITE8_MEMBER(coco_t4426_device::write)
{
LOG("%s(%02x)\n", FUNCNAME, data);
LOGSETUP(" * Offs:%02x <- %02x\n", offset, data);

if ((offset >= 0x04) && (offset <= 0x07))
m_pia->write(space, offset - 0x04, data);
}

/*----------------------------------------------------
pia_A_w - PIA port A write

The T4426 cartridge PIA Port A is connected to
the CE* input of each 2764 ROM and used for banking
in the correct BASIC module at C000-DFFF
The main cartridge ROM at E000-FF00 is fixed however
-----------------------------------------------------*/
#define ROM0 (~0x01 & 0xff)
#define ROM1 (~0x02 & 0xff)
#define ROM2 (~0x04 & 0xff)
#define ROM3 (~0x08 & 0xff)
#define ROM4 (~0x10 & 0xff)
#define ROM5 (~0x20 & 0xff)
#define ROM6 (~0x40 & 0xff)
#define ROM7 (~0x80 & 0xff)

WRITE8_MEMBER( coco_t4426_device::pia_A_w )
{
LOGPIA("%s(%02x)\n", FUNCNAME, data);
m_select = data;
cart_base_changed();
}

/*-------------------------------------------------
get_cart_base
-------------------------------------------------*/

uint8_t* coco_t4426_device::get_cart_base()
{
LOG("%s - m_select %02x -> %02x\n", FUNCNAME, m_select, ~m_select & 0xff );
uint8_t *base = memregion(CARTSLOT_TAG)->base();

switch (m_select)
{
case 0:
case ROM0: base = (uint8_t *) (base + 0x00000); break;
case ROM1: base = (uint8_t *) (base + 0x03000); break;
case ROM2: base = (uint8_t *) (base + 0x06000); break;
case ROM3: base = (uint8_t *) (base + 0x09000); break;
case ROM4: base = (uint8_t *) (base + 0x0c000); break;
case ROM5: base = (uint8_t *) (base + 0x0f000); break;
case ROM6: base = (uint8_t *) (base + 0x13000); break;
case ROM7: base = (uint8_t *) (base + 0x16000); break;
}

#if 0 // Print the beginning of the selected ROM bank, seems to be correct but is not mapped in correctly via coco12.cpp m_sam->read yet
printf("\n");
for (int i = 0; i < 48; i++) printf("%02x ", *((uint8_t *)(base + i)));
printf("\n");
for (int i = 0; i < 48; i++) printf("'%c'", *((uint8_t *)(base + i)));
printf("\n");
#endif

return base;
}
3 changes: 3 additions & 0 deletions src/devices/bus/coco/coco_t4426.h
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,8 @@ class coco_t4426_device :
virtual const tiny_rom_entry *device_rom_region() const override;

virtual uint8_t* get_cart_base() override;
DECLARE_WRITE8_MEMBER( pia_A_w );

protected:
// device-level overrides
virtual void device_start() override;
Expand All @@ -38,6 +40,7 @@ class coco_t4426_device :
// internal state
device_image_interface *m_cart;
cococart_slot_device *m_owner;
uint8_t m_select;

optional_ioport m_autostart;

Expand Down
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