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(nw) pipbug: added cassette load facility for the existing software.

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This commit is contained in:
Robbbert 2019-07-17 21:43:26 +10:00
parent da4bdb96d1
commit 82404081d6
1 changed files with 82 additions and 31 deletions
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113
src/mame/drivers/pipbug.cpp
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@ -2,67 +2,81 @@
// copyright-holders:Robbbert
/***************************************************************************
PIPBUG
PIPBUG
08/04/2010 Skeleton driver.
16/05/2012 Connected to serial terminal.. working
2010-04-08 Skeleton driver.
2012-05-16 Connected to serial terminal.. working
2019-07-17 Added cassette onto L command
All input must be in uppercase.
All input must be in UPPER case.
Commands:
A - See and alter memory
B - Set breakpoint (2 permitted)
C - Clear breakpoint
D - Dump memory to paper tape
G - Go to address, run
L - Load memory from paper tape
S - See and alter registers
Commands:
A - See and alter memory
B - Set breakpoint (2 permitted)
C - Clear breakpoint
D - Dump memory to paper tape
G - Go to address, run
L - Load memory from paper tape
S - See and alter registers
PIPBUG isn't a computer; it is a the name of the bios used
in a number of small 2650-based computers from 1976 to 1978.
Examples include Baby 2650, Eurocard 2650, etc., plus Signetics
own PC1001, PC1500, and KT9500 systems. PIPBUG was written by Signetics.
PIPBUG isn't a computer; it is a the name of the bios used
in a number of small 2650-based computers from 1976 to 1978.
Examples include Baby 2650, Eurocard 2650, etc., plus Signetics
own PC1001, PC1500, and KT9500 systems. PIPBUG was written by Signetics.
The sole means of communication is via a serial terminal.
PIPBUG uses the SENSE and FLAG pins as serial lines, thus
there is no need for a UART. The baud rate is 110.
The sole means of communication is via a serial terminal.
PIPBUG uses the SENSE and FLAG pins as serial lines, thus
there is no need for a UART. The baud rate is 110.
The Baby 2650 (featured in Electronics Australia magazine in
March 1977) has 256 bytes of RAM.
The Baby 2650 (featured in Electronics Australia magazine in
March 1977) has 256 bytes of RAM.
The terminal is expected to have a papertape device attached, and
use it to save and load programs. PIPBUG still thinks it is talking
to the terminal, when in fact the data is flowing to the papertape
reader and punch.
The terminal is expected to have a papertape device attached, and
use it to save and load programs. PIPBUG still thinks it is talking
to the terminal, when in fact the data is flowing to the papertape
reader and punch.
Cassette:
There is software available at 110 baud, using 1200/2400 Hz. This has
been hooked up to the otherwise-useless L command. Baud rate = 110.
After load completes, G440 to run.
****************************************************************************/
#include "emu.h"
#include "bus/rs232/rs232.h"
#include "cpu/s2650/s2650.h"
#include "imagedev/cassette.h"
#include "machine/terminal.h"
#include "imagedev/snapquik.h"
#include "machine/timer.h"
#include "speaker.h"
class pipbug_state : public driver_device
{
public:
pipbug_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_rs232(*this, "rs232"),
m_maincpu(*this, "maincpu")
{
}
: driver_device(mconfig, type, tag)
, m_rs232(*this, "rs232")
, m_maincpu(*this, "maincpu")
, m_cass(*this, "cassette")
{ }
void pipbug(machine_config &config);
private:
DECLARE_WRITE8_MEMBER(pipbug_ctrl_w);
DECLARE_READ_LINE_MEMBER(serial_r);
TIMER_DEVICE_CALLBACK_MEMBER(kansas_r);
required_device<rs232_port_device> m_rs232;
required_device<s2650_device> m_maincpu;
required_device<cassette_image_device> m_cass;
DECLARE_QUICKLOAD_LOAD_MEMBER(quickload_cb);
void pipbug_data(address_map &map);
void pipbug_mem(address_map &map);
u8 m_cass_data[4];
bool m_cassold, m_cassinbit;
};
WRITE8_MEMBER( pipbug_state::pipbug_ctrl_w )
@ -70,6 +84,35 @@ WRITE8_MEMBER( pipbug_state::pipbug_ctrl_w )
// 0x80 is written here - not connected in the baby 2650
}
TIMER_DEVICE_CALLBACK_MEMBER( pipbug_state::kansas_r )
{
// no tape - set to idle
m_cass_data[1]++;
if (m_cass_data[1] > 32)
{
m_cass_data[1] = 32;
m_cassinbit = 1;
}
if ((m_cass->get_state() & CASSETTE_MASK_UISTATE) != CASSETTE_PLAY)
return;
/* cassette - turn 1200/2400Hz to a bit */
bool cass_ws = (m_cass->input() > +0.04) ? 1 : 0;
if (cass_ws != m_cassold)
{
m_cassold = cass_ws;
m_cassinbit = (m_cass_data[1] < 12) ? 1 : 0;
m_cass_data[1] = 0;
}
}
READ_LINE_MEMBER( pipbug_state::serial_r )
{
return m_rs232->rxd_r() & m_cassinbit;
}
void pipbug_state::pipbug_mem(address_map &map)
{
map.unmap_value_high();
@ -167,14 +210,22 @@ void pipbug_state::pipbug(machine_config &config)
m_maincpu->set_addrmap(AS_PROGRAM, &pipbug_state::pipbug_mem);
m_maincpu->set_addrmap(AS_DATA, &pipbug_state::pipbug_data);
m_maincpu->flag_handler().set("rs232", FUNC(rs232_port_device::write_txd));
m_maincpu->sense_handler().set(FUNC(pipbug_state::serial_r));
/* video hardware */
RS232_PORT(config, m_rs232, default_rs232_devices, "terminal");
m_rs232->rxd_handler().set_inputline(m_maincpu, S2650_SENSE_LINE);
m_rs232->set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(terminal));
/* quickload */
QUICKLOAD(config, "quickload", "pgm", attotime::from_seconds(1)).set_load_callback(FUNC(pipbug_state::quickload_cb), this);
SPEAKER(config, "mono").front_center();
/* Cassette */
CASSETTE(config, m_cass);
m_cass->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
TIMER(config, "kansas_r").configure_periodic(FUNC(pipbug_state::kansas_r), attotime::from_hz(40000));
}