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radionic: fixed rtc, and floppy reading. Confirmed crystals.

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This commit is contained in:
Robbbert 2021-04-21 05:56:52 +10:00
parent 5c3ded77a7
commit 937b1fd807
1 changed files with 28 additions and 25 deletions
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53
src/mame/drivers/radionic.cpp
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@ -1,7 +1,7 @@
// license:BSD-3-Clause
// copyright-holders:Robbbert
/***************************************************************************
Komtek 1 (Radionic) memory map
Komtek 1 (Radionic R1001) memory map
0000-37ff ROM R D0-D7
37de UART status R/W D0-D7
@ -28,10 +28,6 @@ Komtek 1 (Radionic) memory map
3c00-3fff video RAM R/W D0-D5,D7 (or D0-D7)
4000-ffff RAM
Interrupts:
IRQ mode 1
NMI
Printer: Level II usually 37e8
Cassette baud rate: 500 baud
@ -44,7 +40,7 @@ FF:
- bit 6 remembers the 32/64 screen mode (inverted)
- bit 7 is for reading from a cassette
Shift and Right-arrow will enable 32 cpl, if the hardware allows it.
Shift and Right-arrow will enable 32 cpl.
SYSTEM commands:
- Press Break (End key) to quit
@ -55,7 +51,7 @@ SYSTEM commands:
About the RTC - The time is incremented while ever the cursor is flashing. It is stored in a series
of bytes in the computer's work area. The bytes are in a certain order, this is:
seconds, minutes, hours, year, day, month. The seconds are stored at 0x4041.
seconds, minutes, hours, days. The seconds are stored at 0x4041.
A reboot always sets the time to zero.
Radionic has 16 colours with a byte at 350B controlling the operation. See manual.
@ -71,8 +67,8 @@ To Do / Status:
- Writing to floppy is problematic; freezing/crashing are common issues.
radionic: works
floppy not working (@6C0, DRQ never gets set)
add colour
add colour (no schematic; manual says jumpers set the Auto-Colour, but this isn't
documented anywhere).
expansion-box?
uart
@ -81,6 +77,7 @@ radionic: works
#include "emu.h"
#include "includes/trs80.h"
#include "machine/i8255.h"
#define MASTER_XTAL 12164800
class radionic_state : public trs80_state
@ -94,6 +91,7 @@ public:
void radionic(machine_config &config);
private:
INTERRUPT_GEN_MEMBER(rtc_via_nmi);
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
void mem_map(address_map &map);
@ -236,10 +234,14 @@ static INPUT_PORTS_START( radionic )
PORT_BIT(0xfe, 0x00, IPT_UNUSED)
PORT_START("CONFIG")
PORT_CONFNAME( 0x80, 0x00, "Floppy Disc Drives")
PORT_CONFSETTING( 0x00, DEF_STR( Off ) )
PORT_CONFSETTING( 0x80, DEF_STR( On ) )
PORT_BIT(0x7f, 0x7f, IPT_UNUSED)
PORT_CONFNAME( 0xc0, 0x00, "Floppy and RTC") // Floppy doesn't work if RTC is on, so interlink them.
PORT_CONFSETTING( 0x00, "Both Off" )
PORT_CONFSETTING( 0x80, "RTC off, Floppy On" )
PORT_CONFSETTING( 0x40, "RTC on, Floppy Off" )
PORT_CONFNAME( 0x30, 0x00, "Colour") // This isn't hooked up yet
PORT_CONFSETTING( 0x00, "Monochrome" )
PORT_CONFSETTING( 0x10, "Auto Colour" )
PORT_CONFSETTING( 0x30, "Programmable Colour" )
PORT_START("E9") // these are the power-on uart settings
PORT_BIT(0x07, IP_ACTIVE_LOW, IPT_UNUSED )
@ -318,6 +320,12 @@ uint32_t radionic_state::screen_update(screen_device &screen, bitmap_ind16 &bitm
return 0;
}
INTERRUPT_GEN_MEMBER(radionic_state::rtc_via_nmi)
{
if (BIT(m_io_config->read(), 6))
m_maincpu->pulse_input_line(INPUT_LINE_NMI, attotime::from_nsec(1));
}
void radionic_state::floppy_formats(format_registration &fr)
{
fr.add(FLOPPY_JV1_FORMAT);
@ -334,23 +342,18 @@ static void radionic_floppies(device_slot_interface &device)
device.option_add("80t_qd", FLOPPY_525_QD);
}
void radionic_state::radionic(machine_config &config)
{
/* basic machine hardware */
Z80(config, m_maincpu, 3579000 / 2);
//m_maincpu->set_clock(12_MHz_XTAL / 6); // or 3.579MHz / 2 (selectable?)
// Photos from Incog show 12.1648, and 3.579545 xtals. The schematic seems to just approximate these values.
Z80(config, m_maincpu, 3.579545_MHz_XTAL / 2);
//m_maincpu->set_clock(MASTER_XTAL / 6); // or 3.579545_MHz_XTAL / 2 (selectable?)
m_maincpu->set_addrmap(AS_PROGRAM, &radionic_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &radionic_state::io_map);
// Komtek I "User Friendly Manual" calls for "Z80 running at 1.97 MHz." This likely refers to an alternate NTSC version
// whose master clock was approximately 11.8005 MHz (6 times ~1.966 MHz and 750 times 15.734 kHz). Though the schematics
// provide the main XTAL frequency as 12 MHz, that they also include a 3.579 MHz XTAL suggests this possibility.
m_maincpu->set_periodic_int(FUNC(radionic_state::rtc_interrupt), attotime::from_hz(40));
m_maincpu->set_periodic_int(FUNC(radionic_state::nmi_line_pulse), attotime::from_hz(12_MHz_XTAL / 12 / 16384));
m_maincpu->set_periodic_int(FUNC(radionic_state::rtc_via_nmi), attotime::from_hz(MASTER_XTAL / 12 / 16384)); // breaks floppy
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_raw(12_MHz_XTAL, 768, 0, 512, 312, 0, 256);
screen.set_raw(MASTER_XTAL, 768, 0, 512, 312, 0, 256);
screen.set_screen_update(FUNC(radionic_state::screen_update));
screen.set_palette("palette");
@ -427,5 +430,5 @@ ROM_START(radionic)
ROM_END
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1983, radionic, 0, trs80l2, radionic, radionic, radionic_state, empty_init, "Komtek", "Radionic", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1983, radionic, 0, trs80l2, radionic, radionic, radionic_state, empty_init, "Komtek", "Radionic R1001/Komtek 1", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )