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(nw) newbrain : fixed cassette

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This commit is contained in:
Robbbert 2019-06-23 05:19:44 +10:00
parent 1576d093dd
commit d270f0696b
2 changed files with 20 additions and 13 deletions
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27
src/mame/drivers/newbrain.cpp
View File

@ -36,7 +36,7 @@
- VFD does not receive data from main CPU
- bitmapped video
- accurate video timing
- cassette
- cassette motor control seems to have a COP cpu problem
- EIM
- floppy
- CP/M 2.2 ROMs
@ -50,7 +50,8 @@
#include "emu.h"
#include "includes/newbrain.h"
#include "sound/wave.h"
#include "speaker.h"
#include "screen.h"
#include "newbrain.lh"
@ -425,13 +426,17 @@ READ8_MEMBER( newbrain_state::cop_g_r )
// cop_g_w -
//-------------------------------------------------
// m_cop_g1 and m_cop_g3, when activated, have 20 zeros and a 1 in a continuous sequence.
// m_cop_k6 randomly alternates between 0 and 1, spending more time at 1.
// The outcome is the cassette is unreadable.
// Therefore the motors are left permanently on until the above issues can be fixed.
void newbrain_state::tm()
{
cassette_state tm1 = (!m_cop_g3 && !m_cop_k6) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED;
cassette_state tm2 = (!m_cop_g1 && !m_cop_k6) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED;
// cassette_state tm1 = (!m_cop_g1 && !m_cop_k6) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED;
// cassette_state tm2 = (!m_cop_g3 && !m_cop_k6) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED;
m_cassette1->change_state(tm1, CASSETTE_MASK_MOTOR);
m_cassette2->change_state(tm2, CASSETTE_MASK_MOTOR);
// m_cassette1->change_state(tm1, CASSETTE_MASK_MOTOR);
// m_cassette2->change_state(tm2, CASSETTE_MASK_MOTOR);
}
WRITE8_MEMBER( newbrain_state::cop_g_w )
@ -559,7 +564,7 @@ WRITE_LINE_MEMBER( newbrain_state::k2_w )
int newbrain_state::tpin()
{
return (m_cassette1->input() > +1.0) || (m_cassette2->input() > +1.0);
return (m_cassette1->input() > +0.04) || (m_cassette2->input() > +0.04);
}
READ_LINE_MEMBER( newbrain_state::tdi_r )
@ -833,16 +838,20 @@ void newbrain_state::newbrain(machine_config &config)
NEWBRAIN_EXPANSION_SLOT(config, m_exp, XTAL(16'000'000)/4, newbrain_expansion_cards, "eim");
CASSETTE(config, m_cassette1);
m_cassette1->set_default_state((cassette_state)(CASSETTE_STOPPED | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_MUTED));
m_cassette1->set_default_state(cassette_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED));
CASSETTE(config, m_cassette2);
m_cassette2->set_default_state((cassette_state)(CASSETTE_STOPPED | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_MUTED));
m_cassette2->set_default_state(cassette_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED));
RS232_PORT(config, RS232_V24_TAG, default_rs232_devices, nullptr);
RS232_PORT(config, RS232_PRN_TAG, default_rs232_devices, nullptr);
// internal ram
RAM(config, RAM_TAG).set_default_size("32K");
SPEAKER(config, "mono").front_center();
WAVE(config, "wave1", m_cassette1).add_route(ALL_OUTPUTS, "mono", 0.05);
WAVE(config, "wave2", m_cassette2).add_route(ALL_OUTPUTS, "mono", 0.05);
}

6
src/mame/includes/newbrain.h
View File

@ -19,8 +19,6 @@
#define SCREEN_TAG "screen"
#define Z80_TAG "409"
#define COP420_TAG "419"
#define CASSETTE_TAG "cassette"
#define CASSETTE2_TAG "cassette2"
#define RS232_V24_TAG "to"
#define RS232_PRN_TAG "po"
@ -33,8 +31,8 @@ public:
m_cop(*this, COP420_TAG),
m_palette(*this, "palette"),
m_exp(*this, NEWBRAIN_EXPANSION_SLOT_TAG),
m_cassette1(*this, CASSETTE_TAG),
m_cassette2(*this, CASSETTE2_TAG),
m_cassette1(*this, "cassette1"),
m_cassette2(*this, "cassette2"),
m_rs232_v24(*this, RS232_V24_TAG),
m_rs232_prn(*this, RS232_PRN_TAG),
m_ram(*this, RAM_TAG),