SBC + 2/4 - mame (0280) machine

MAME: 0280 - Released: 2025-08-29T22:26:57 - Machines: 48893 - rom: 364836 - disk: 1378

machine

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name	sourcefile	sampleof	isbios	isdevice	ismechanical	runnable	description	year	manufacturer	cloneof	romof
qtsbc	skeleton/qtsbc.cpp		no	no	no	yes	SBC + 2/4	198?	QT Computer Systems Inc.

display

tag	type	rotate	width	height	refresh	pixclock	htotal	hbend	hbstart	vtotal	vbend	vbstart	flipx
rs232:terminal:terminal_screen	raster	0	640	240	50.000000								no

driver

status	emulation	savestate	requiresartwork	unofficial	nosoundhardware	incomplete	cocktail
preliminary	preliminary	unsupported	no	no	no	no

rom

name	size	crc	sha1	region	offset	status	optional	merge	bios
qtsbc.u23	2048	823fd942	64c4f74dd069ae4d43d301f5e279185f32a1efa0	maincpu	0	good	no

chip

type	tag	name	clock
cpu	maincpu	Zilog Z80	4000000
audio	rs232:terminal:bell	Speaker
audio	rs232:terminal:beeper	Beep	2000

device_ref

name
z80
pit8253
pit_counter
pit_counter
pit_counter
i8251
rs232
serial_terminal
screen
generic_keyboard
speaker
beep

sound

channels
1

feature

type	status	overall
sound	unemulated

input

players	coins	service	tilt
1		no	no

control

type	player	buttons	ways	reverse	minimum	maximum	sensitivity	keydelta	ways2	ways3	reqbuttons
keyboard		73		no

port, analog

port_tag	analog_masks
:DSW1
:DSW2
:DSW3
:JUMPERS
:SPEED
:rs232:terminal:RS232_DATABITS
:rs232:terminal:RS232_PARITY
:rs232:terminal:RS232_RXBAUD
:rs232:terminal:RS232_STOPBITS
:rs232:terminal:RS232_TXBAUD
:rs232:terminal:TERM_CONF
:rs232:terminal:keyboard:GENKBD_CFG
:rs232:terminal:keyboard:GENKBD_MOD
:rs232:terminal:keyboard:GENKBD_ROW0
:rs232:terminal:keyboard:GENKBD_ROW1
:rs232:terminal:keyboard:GENKBD_ROW2
:rs232:terminal:keyboard:GENKBD_ROW3

slot, slotoption

slot_name	slotoption_name	slotoption_devname	slotoption_default
rs232	terminal	serial_terminal	yes
rs232	sunkbd	sunkbd_adaptor	no
rs232	dec_loopback	dec_rs232_loopback	no
rs232	ie15	ie15_terminal	no
rs232	null_modem	null_modem	no
rs232	keyboard	serial_keyboard	no
rs232	patch	rs232_patch_box	no
rs232	swtpc8212	swtpc8212_terminal	no
rs232	printer	serial_printer	no
rs232	scorpion	scorpion_ic	no
rs232	loopback	rs232_loopback	no
rs232	mockingboard	mockingboardd	no
rs232	msystems_mouse	rs232_mouse_hle_msystems	no
rs232	nss_tvi	nss_tvinterface	no
rs232	rs232_sync_io	rs232_sync_io	no
rs232	pty	pseudo_terminal	no
rs232	votraxtnt	serial_votraxtnt	no
rs232	rs_printer	rs_serial_printer	no

configuration

CPU Speed

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
CPU Speed	SPEED	1

setting

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
2 MHz	0	no
4 MHz	1	yes

Data Bits

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Data Bits	rs232:terminal:RS232_DATABITS	255

setting

name	value	default
5	0	no
6	1	no
7	2	yes
8	3	no

Parity

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Parity	rs232:terminal:RS232_PARITY	255

setting

name	value	default
None	0	no
Odd	1	no
Even	2	yes
Mark	3	no
Space	4	no

RX Baud

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
RX Baud	rs232:terminal:RS232_RXBAUD	255

setting

name	value	default
50	14	no
75	15	no
110	0	no
134.5	16	no
150	1	no
200	17	no
300	2	no
600	3	no
1200	4	no
1800	18	no
2000	19	no
2400	5	no
3600	20	no
4800	6	no
7200	21	no
9600	7	yes
14400	8	no
19200	9	no
28800	10	no
38400	11	no
57600	12	no
111900	22	no
115200	13	no

Stop Bits

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Stop Bits	rs232:terminal:RS232_STOPBITS	255

setting

name	value	default
0	0	no
1	1	yes
1.5	2	no
2	3	no

TX Baud

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
TX Baud	rs232:terminal:RS232_TXBAUD	255

setting

name	value	default
50	14	no
75	15	no
110	0	no
134.5	16	no
150	1	no
200	17	no
300	2	no
600	3	no
1200	4	no
1800	18	no
2000	19	no
2400	5	no
3600	20	no
4800	6	no
7200	21	no
9600	7	yes
14400	8	no
19200	9	no
28800	10	no
38400	11	no
57600	12	no
111900	22	no
115200	13	no

Cursor

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Cursor	rs232:terminal:TERM_CONF	1

setting

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
No	0	no
Yes	1	yes

Type

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Type	rs232:terminal:TERM_CONF	2

setting

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Underline	0	no
Block	2	yes

Blinking

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Blinking	rs232:terminal:TERM_CONF	4

setting

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
No	0	no
Yes	4	yes

Invert

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Invert	rs232:terminal:TERM_CONF	8

setting

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
No	0	no
Yes	8	yes

Color

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Color	rs232:terminal:TERM_CONF	48

setting

name	value	default
Green	0	yes
Amber	16	no
White	32	no

Auto CR on LF

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Auto CR on LF	rs232:terminal:TERM_CONF	64

setting

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
No	0	no
Yes	64	yes

Auto LF on CR

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Auto LF on CR	rs232:terminal:TERM_CONF	128

setting

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
No	0	yes
Yes	128	no

Local echo

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Local echo	rs232:terminal:TERM_CONF	256

setting

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
No	0	yes
Yes	256	no

Layout

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Layout	rs232:terminal:keyboard:GENKBD_CFG	1

setting

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
ANSI	0	yes
JIS	1	no

Typematic Delay

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Typematic Delay	rs232:terminal:keyboard:GENKBD_CFG	6

setting

name	value	default
0.25s	0	no
0.5s	2	no
0.75s	4	yes
1.0s	6	no

Typematic Rate

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Typematic Rate	rs232:terminal:keyboard:GENKBD_CFG	248

setting

name	value	default
2.0cps	0	no
2.1cps	8	no
2.5cps	16	no
2.7cps	24	no
2.0cps	32	no
2.1cps	40	no
2.5cps	48	no
2.7cps	56	no
3.3cps	64	no
3.8cps	72	no
4.0cps	80	no
4.3cps	88	no
4.6cps	96	no
5.0cps	104	no
5.5cps	112	no
6.0cps	120	no
8.0cps	128	no
8.6cps	136	no
9.2cps	144	no
10.0cps	152	yes
10.9cps	160	no
12.0cps	168	no
13.3cps	176	no
15.0cps	184	no
16.0cps	192	no
17.1cps	200	no
18.5cps	208	no
20.0cps	216	no
21.8cps	224	no
24.0cps	232	no
26.7cps	240	no
30.0cps	248	no

dipswitch

On-Board I/O Ports

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
On-Board I/O Ports	DSW1	31

location

name	number	inverted
SW1	1	no
SW1	2	no
SW1	3	no
SW1	4	no
SW1	5	no

value

name	value	default
00-07	0	yes
08-0F	1	no
10-17	2	no
18-1F	3	no
20-27	4	no
28-2F	5	no
30-37	6	no
38-3F	7	no
40-47	8	no
48-4F	9	no
50-57	10	no
58-5F	11	no
60-67	12	no
68-6F	13	no
70-77	14	no
78-7F	15	no
80-87	16	no
88-8F	17	no
90-87	18	no
98-9F	19	no
A0-A7	20	no
A8-AF	21	no
B0-B7	22	no
B8-BF	23	no
C0-C7	24	no
C8-CF	25	no
D0-D7	26	no
D8-DF	27	no
E0-E7	28	no
E8-EF	29	no
F0-F7	30	no
F8-FF	31	no

Unused

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unused	DSW1	32

location

name	number	inverted
SW1	6	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	32	yes
On	0	no

On-Board RAM Address

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
On-Board RAM Address	DSW2	63

location

name	number	inverted
SW2	6	no
SW2	5	no
SW2	4	no
SW2	3	no
SW2	2	no
SW2	1	no

value

name	value	default
0000-03FF	0	no
0400-07FF	1	no
0800-0BFF	2	no
0C00-0FFF	3	no
1000-13FF	4	no
1400-17FF	5	no
1800-1BFF	6	no
1C00-1FFF	7	no
2000-23FF	8	no
2400-27FF	9	no
2800-2BFF	10	no
2C00-2FFF	11	no
3000-33FF	12	no
3400-37FF	13	no
3800-3BFF	14	no
3C00-3FFF	15	no
4000-43FF	16	no
4400-47FF	17	no
4800-4BFF	18	no
4C00-4FFF	19	no
5000-53FF	20	no
5400-57FF	21	no
5800-5BFF	22	no
5C00-5FFF	23	no
6000-63FF	24	no
6400-67FF	25	no
6800-6BFF	26	no
6C00-6FFF	27	no
7000-73FF	28	no
7400-77FF	29	no
7800-7BFF	30	no
7C00-7FFF	31	no
8000-83FF	32	no
8400-87FF	33	no
8800-8BFF	34	no
8C00-8FFF	35	no
9000-93FF	36	no
9400-97FF	37	no
9800-9BFF	38	no
9C00-9FFF	39	no
A000-A3FF	40	no
A400-A7FF	41	no
A800-ABFF	42	no
AC00-AFFF	43	no
B000-B3FF	44	no
B400-B7FF	45	no
B800-BBFF	46	no
BC00-BFFF	47	no
C000-C3FF	48	no
C400-C7FF	49	no
C800-CBFF	50	no
CC00-CFFF	51	no
D000-D3FF	52	no
D400-D7FF	53	no
D800-DBFF	54	no
DC00-DFFF	55	yes
E000-E3FF	56	no
E400-E7FF	57	no
E800-EBFF	58	no
EC00-EFFF	59	no
F000-F3FF	60	no
F400-F7FF	61	no
F800-FBFF	62	no
FC00-FFFF	63	no

On-Board EPROM Address

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
On-Board EPROM Address	DSW3	63

location

name	number	inverted
SW3	6	no
SW3	5	no
SW3	4	no
SW3	3	no
SW3	2	no
SW3	1	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
0000-03FF	0	no	JUMPERS	4	eq	0
0400-07FF	1	no	JUMPERS	4	eq	0
0800-0BFF	2	no	JUMPERS	4	eq	0
0C00-0FFF	3	no	JUMPERS	4	eq	0
1000-13FF	4	no	JUMPERS	4	eq	0
1400-17FF	5	no	JUMPERS	4	eq	0
1800-1BFF	6	no	JUMPERS	4	eq	0
1C00-1FFF	7	no	JUMPERS	4	eq	0
2000-23FF	8	no	JUMPERS	4	eq	0
2400-27FF	9	no	JUMPERS	4	eq	0
2800-2BFF	10	no	JUMPERS	4	eq	0
2C00-2FFF	11	no	JUMPERS	4	eq	0
3000-33FF	12	no	JUMPERS	4	eq	0
3400-37FF	13	no	JUMPERS	4	eq	0
3800-3BFF	14	no	JUMPERS	4	eq	0
3C00-3FFF	15	no	JUMPERS	4	eq	0
4000-43FF	16	no	JUMPERS	4	eq	0
4400-47FF	17	no	JUMPERS	4	eq	0
4800-4BFF	18	no	JUMPERS	4	eq	0
4C00-4FFF	19	no	JUMPERS	4	eq	0
5000-53FF	20	yes	JUMPERS	4	eq	0
5400-57FF	21	no	JUMPERS	4	eq	0
5800-5BFF	22	no	JUMPERS	4	eq	0
5C00-5FFF	23	no	JUMPERS	4	eq	0
6000-63FF	24	no	JUMPERS	4	eq	0
6400-67FF	25	no	JUMPERS	4	eq	0
6800-6BFF	26	no	JUMPERS	4	eq	0
6C00-6FFF	27	no	JUMPERS	4	eq	0
7000-73FF	28	no	JUMPERS	4	eq	0
7400-77FF	29	no	JUMPERS	4	eq	0
7800-7BFF	30	no	JUMPERS	4	eq	0
7C00-7FFF	31	no	JUMPERS	4	eq	0
8000-83FF	32	no	JUMPERS	4	eq	0
8400-87FF	33	no	JUMPERS	4	eq	0
8800-8BFF	34	no	JUMPERS	4	eq	0
8C00-8FFF	35	no	JUMPERS	4	eq	0
9000-93FF	36	no	JUMPERS	4	eq	0
9400-97FF	37	no	JUMPERS	4	eq	0
9800-9BFF	38	no	JUMPERS	4	eq	0
9C00-9FFF	39	no	JUMPERS	4	eq	0
A000-A3FF	40	no	JUMPERS	4	eq	0
A400-A7FF	41	no	JUMPERS	4	eq	0
A800-ABFF	42	no	JUMPERS	4	eq	0
AC00-AFFF	43	no	JUMPERS	4	eq	0
B000-B3FF	44	no	JUMPERS	4	eq	0
B400-B7FF	45	no	JUMPERS	4	eq	0
B800-BBFF	46	no	JUMPERS	4	eq	0
BC00-BFFF	47	no	JUMPERS	4	eq	0
C000-C3FF	48	no	JUMPERS	4	eq	0
C400-C7FF	49	no	JUMPERS	4	eq	0
C800-CBFF	50	no	JUMPERS	4	eq	0
CC00-CFFF	51	no	JUMPERS	4	eq	0
D000-D3FF	52	no	JUMPERS	4	eq	0
D400-D7FF	53	no	JUMPERS	4	eq	0
D800-DBFF	54	no	JUMPERS	4	eq	0
DC00-DFFF	55	no	JUMPERS	4	eq	0
E000-E3FF	56	no	JUMPERS	4	eq	0
E400-E7FF	57	no	JUMPERS	4	eq	0
E800-EBFF	58	no	JUMPERS	4	eq	0
EC00-EFFF	59	no	JUMPERS	4	eq	0
F000-F3FF	60	no	JUMPERS	4	eq	0
F400-F7FF	61	no	JUMPERS	4	eq	0
F800-FBFF	62	no	JUMPERS	4	eq	0
FC00-FFFF	63	no	JUMPERS	4	eq	0
0000-07FF	0	no	JUMPERS	4	eq	4
0800-0FFF	2	no	JUMPERS	4	eq	4
1000-17FF	4	no	JUMPERS	4	eq	4
1800-1FFF	6	no	JUMPERS	4	eq	4
2000-27FF	8	no	JUMPERS	4	eq	4
2800-2FFF	10	no	JUMPERS	4	eq	4
3000-37FF	12	no	JUMPERS	4	eq	4
3800-3FFF	14	no	JUMPERS	4	eq	4
4000-47FF	16	no	JUMPERS	4	eq	4
4800-4FFF	18	no	JUMPERS	4	eq	4
5000-57FF	20	yes	JUMPERS	4	eq	4
5800-5FFF	22	no	JUMPERS	4	eq	4
6000-67FF	24	no	JUMPERS	4	eq	4
6800-6FFF	26	no	JUMPERS	4	eq	4
7000-77FF	28	no	JUMPERS	4	eq	4
7800-7FFF	30	no	JUMPERS	4	eq	4
8000-87FF	32	no	JUMPERS	4	eq	4
8800-8FFF	34	no	JUMPERS	4	eq	4
9000-97FF	36	no	JUMPERS	4	eq	4
9800-9FFF	38	no	JUMPERS	4	eq	4
A000-A7FF	40	no	JUMPERS	4	eq	4
A800-AFFF	42	no	JUMPERS	4	eq	4
B000-B7FF	44	no	JUMPERS	4	eq	4
B800-BFFF	46	no	JUMPERS	4	eq	4
C000-C7FF	48	no	JUMPERS	4	eq	4
C800-CFFF	50	no	JUMPERS	4	eq	4
D000-D7FF	52	no	JUMPERS	4	eq	4
D800-DFFF	54	no	JUMPERS	4	eq	4
E000-E7FF	56	no	JUMPERS	4	eq	4
E800-EFFF	58	no	JUMPERS	4	eq	4
F000-F7FF	60	no	JUMPERS	4	eq	4
F800-FFFF	62	no	JUMPERS	4	eq	4

EPROM Phantom Mode

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
EPROM Phantom Mode	JUMPERS	1	JUMPERS	2	eq	0

location

name	number	inverted
Q to R	1	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	0	no
On	1	yes

On-Board EPROM

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
On-Board EPROM	JUMPERS	1	JUMPERS	2	eq	2

location

name	number	inverted
Q to R	1	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Disabled	1	no
Enabled	0	yes

Power-On Jump

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Power-On Jump	JUMPERS	2

location

name	number	inverted
T to U	1	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	2	no
On	0	yes

On-Board EPROM Size

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
On-Board EPROM Size	JUMPERS	4

location

name	number	inverted
P to O	1	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
1K x 8 (2708)	0	no
2K x 8 (2716)	4	yes