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(nw) sorcerer : cp/m disk almost boots

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This commit is contained in:
Robbbert 2018-08-18 15:09:06 +10:00
parent 577f198564
commit ceabdcbe8d
4 changed files with 22 additions and 12 deletions
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7
src/mame/drivers/sorcerer.cpp
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@ -140,9 +140,9 @@ Exidy Sorcerer Video/Disk Unit:
emulation done but it's all guesswork. The unit contains 2 dipswitch units
(one has 4 switches and the other has 8), a 8 MHz crystal, 3 proms and a
FD1793-B01 fdc. Going by the code, it would appear to place the Z-80 into
WAIT while reading a sector. However, we don't get that far; it bombs out
with Record Not Found. We need suitable disk images.
To try it out: GO BF00 at the monitor prompt.
WAIT while reading a sector. To try it out: GO BF00 at the monitor prompt.
Currently the CP/M sign-on message appears, followed by lockup due to a
fdc problem.
********************************************************************************/
@ -490,6 +490,7 @@ MACHINE_CONFIG_START(sorcerer_state::sorcererd)
MCFG_LEGACY_FLOPPY_4_DRIVES_ADD(sorcerer_floppy_interface)
MCFG_DEVICE_ADD("fdc2", FD1793, 8_MHz_XTAL / 8) // confirmed clock
MCFG_WD_FDC_FORCE_READY // should be able to get rid of this when fdc issue is fixed
MCFG_WD_FDC_INTRQ_CALLBACK(WRITELINE(*this, sorcerer_state, intrq_w))
MCFG_WD_FDC_DRQ_CALLBACK(WRITELINE(*this, sorcerer_state, drq_w))
MCFG_FLOPPY_DRIVE_ADD("fdc2:0", floppies, "525qd", floppy_image_device::default_floppy_formats)

1
src/mame/includes/sorcerer.h
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@ -104,6 +104,7 @@ private:
bool m_wait;
bool m_drq_off;
bool m_intrq_off;
uint8_t m_2c;
uint8_t m_fe;
uint8_t m_keyboard_line;
const uint8_t *m_p_videoram;

25
src/mame/machine/sorcerer.cpp
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@ -154,6 +154,12 @@ WRITE_LINE_MEMBER(sorcerer_state::intrq_w)
m_maincpu->set_input_line(Z80_INPUT_LINE_WAIT, CLEAR_LINE);
m_wait = false;
}
else
if (BIT(m_2c, 0) && m_drq_off && !m_wait)
{
m_maincpu->set_input_line(Z80_INPUT_LINE_WAIT, ASSERT_LINE);
m_wait = true;
}
}
// The next byte from floppy is available. Enable CPU so it can get the byte.
@ -165,6 +171,12 @@ WRITE_LINE_MEMBER(sorcerer_state::drq_w)
m_maincpu->set_input_line(Z80_INPUT_LINE_WAIT, CLEAR_LINE);
m_wait = false;
}
else
if (BIT(m_2c, 0) && m_intrq_off && !m_wait)
{
m_maincpu->set_input_line(Z80_INPUT_LINE_WAIT, ASSERT_LINE);
m_wait = true;
}
}
// Port 2C control signals for the video/disk unit's floppy disks
@ -173,20 +185,16 @@ WRITE_LINE_MEMBER(sorcerer_state::drq_w)
// bit 0 = enable wait generator, bit 2 = drive 0 select, bit 5 = ??
WRITE8_MEMBER(sorcerer_state::port_2c_w)
{
m_2c = data;
if (BIT(data, 0))
{
if (m_drq_off && m_intrq_off)
if (!m_wait && m_drq_off && m_intrq_off)
{
m_maincpu->set_input_line(Z80_INPUT_LINE_WAIT, ASSERT_LINE);
m_wait = true;
}
}
else
{
m_maincpu->set_input_line(Z80_INPUT_LINE_WAIT, CLEAR_LINE);
m_wait = false;
}
floppy_image_device *floppy = nullptr;
@ -201,7 +209,7 @@ WRITE8_MEMBER(sorcerer_state::port_2c_w)
floppy->ss_w(0); // assume side 0 ? // BIT(data, 4));
}
m_fdc2->dden_w(1); // assume single density ? //!BIT(data, 0));
m_fdc2->dden_w(0); // assume double density ? //!BIT(data, 0));
}
WRITE8_MEMBER(sorcerer_state::port_fd_w)
@ -455,6 +463,7 @@ void sorcerer_state::machine_reset()
m_intrq_off = true;
m_wait = false;
m_fe = 0xff;
m_2c = 0;
port_fe_w(space, 0, 0, 0xff);
membank("boot")->set_entry(1);

1
src/mame/machine/trs80m3.cpp
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@ -375,7 +375,6 @@ WRITE8_MEMBER( trs80m3_state::port_f4_w )
{
if (BIT(data, 6))
{
if (m_drq_off && m_intrq_off)
{
m_maincpu->set_input_line(Z80_INPUT_LINE_WAIT, ASSERT_LINE);