BT Merlin M2105 - mame (0284) machine

MAME: 0284 - Released: 2025-12-30T16:33:58 - Machines: 49538 - rom: 367487 - disk: 1392

machine

• XML • JSON • RUN

name	sourcefile	sampleof	isbios	isdevice	ismechanical	runnable	description	year	manufacturer	cloneof	romof
btm2105	acorn/electron.cpp		no	no	no	yes	BT Merlin M2105	1985	British Telecom Business Systems	electron	electron

snap

Key	Length	LastWriteTime	Width	Height	HorizontalResolution	VerticalResolution	PaletteLength	PixelFormat	PropertyItems
btm2105	997	29/12/2025 11:31:17	640	256	96	96	0	Format24bppRgb	305:MAME 0.176 (Jul 27 2016)

display

tag	type	rotate	width	height	refresh	pixclock	htotal	hbend	hbstart	vtotal	vbend	vbstart	flipx
screen	raster	0	640	256	50.080128	16000000	1024	0	640	312	0	256	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
os_basic.ic2	32768	b997f9cb	4a66c83aba07d0a8e76ed8a5545af04e11c19fdc	mos	0	good	no	os_basic.ic2

chip

type	tag	name	clock
cpu	maincpu	MOS Technology 6502	2000000
audio	mono	Speaker
audio	ula	Acorn Electron ULA	16000000
audio	cassette	Cassette
audio	exp:m2105:vsp	TMS5220	640000
audio	exp:m2105:mono	Speaker

softwarelist

tag	name	status	filter
cass_list_bbc	bbc_cass	compatible	ELK

device_ref

tag	name
:maincpu	m6502
:irqs	ipt_merge_any_hi
:screen	screen
:palette	palette
:mono	speaker
:ram	ram
:ula	electron_ula
:cassette	cassette_image
:exp	electron_expansion_slot
:exp:m2105	electron_m2105
:exp:m2105:nvram	nvram
:exp:m2105:irqs	ipt_merge_any_hi
:exp:m2105:via0	mos6522
:exp:m2105:via1	mos6522
:exp:m2105:duart	scn2681
:exp:m2105:duart:cha	duart_channel
:exp:m2105:duart:chb	duart_channel
:exp:m2105:modem	rs232
:exp:m2105:modem:null_modem	null_modem
:exp:m2105:modem:null_modem:stream	bitbanger
:exp:m2105:rs232	rs232
:exp:m2105:centronics	centronics
:exp:m2105:centronics:printer	centronics_printer
:exp:m2105:centronics:printer:printer	printer_image
:exp:m2105:cent_data_out	output_latch
:exp:m2105:vsp	tms5220
:exp:m2105:vsm	tms6100
:exp:m2105:mono	speaker
:cass_list_bbc	software_list

sound

channels
2

feature

type	status	overall
graphics		imperfect

ramoption

name	default
32K	yes

device, instance

type	tag	interface	name	briefname
cassette	cassette	bbc_cass	cassette	cass
bitbanger	exp:m2105:modem:null_modem:stream		bitbanger	bitb
printout	exp:m2105:centronics:printer:printer		printout	prin

device, extension

type	tag	interface	extension_names
cassette	cassette	bbc_cass	wav, flac, csw, uef
bitbanger	exp:m2105:modem:null_modem:stream
printout	exp:m2105:centronics:printer:printer		prn

input

players	coins	service	tilt
1		no	no

control

type	player	buttons	ways	reverse	minimum	maximum	sensitivity	keydelta	ways2	ways3
keyboard		55		no

port, analog

port_tag	analog_masks
:BRK
:LINE.0
:LINE.1
:LINE.10
:LINE.11
:LINE.12
:LINE.13
:LINE.2
:LINE.3
:LINE.4
:LINE.5
:LINE.6
:LINE.7
:LINE.8
:LINE.9
:exp:m2105:modem:null_modem:FLOW_CONTROL
:exp:m2105:modem:null_modem:RS232_DATABITS
:exp:m2105:modem:null_modem:RS232_PARITY
:exp:m2105:modem:null_modem:RS232_RXBAUD
:exp:m2105:modem:null_modem:RS232_STOPBITS
:exp:m2105:modem:null_modem:RS232_TXBAUD

slot, slotoption

slot_name	slotoption_name	slotoption_devname	slotoption_default
exp:m2105:modem	terminal	serial_terminal	no
exp:m2105:modem	sunkbd	sunkbd_adaptor	no
exp:m2105:modem	votraxtnt	serial_votraxtnt	no
exp:m2105:modem	rs_printer	rs_serial_printer	no
exp:m2105:modem	dec_loopback	dec_rs232_loopback	no
exp:m2105:modem	h19	serial_heath_h19	no
exp:m2105:modem	ie15	ie15_terminal	no
exp:m2105:modem	null_modem	null_modem	yes
exp:m2105:modem	keyboard	serial_keyboard	no
exp:m2105:modem	patch	rs232_patch_box	no
exp:m2105:modem	swtpc8212	swtpc8212_terminal	no
exp:m2105:modem	printer	serial_printer	no
exp:m2105:modem	scorpion	scorpion_ic	no
exp:m2105:modem	loopback	rs232_loopback	no
exp:m2105:modem	mockingboard	mockingboardd	no
exp:m2105:modem	msystems_mouse	rs232_mouse_hle_msystems	no
exp:m2105:modem	nss_tvi	nss_tvinterface	no
exp:m2105:modem	rs232_sync_io	rs232_sync_io	no
exp:m2105:modem	pty	pseudo_terminal	no
exp:m2105:rs232	terminal	serial_terminal	no
exp:m2105:rs232	sunkbd	sunkbd_adaptor	no
exp:m2105:rs232	votraxtnt	serial_votraxtnt	no
exp:m2105:rs232	rs_printer	rs_serial_printer	no
exp:m2105:rs232	dec_loopback	dec_rs232_loopback	no
exp:m2105:rs232	h19	serial_heath_h19	no
exp:m2105:rs232	ie15	ie15_terminal	no
exp:m2105:rs232	null_modem	null_modem	no
exp:m2105:rs232	keyboard	serial_keyboard	no
exp:m2105:rs232	patch	rs232_patch_box	no
exp:m2105:rs232	swtpc8212	swtpc8212_terminal	no
exp:m2105:rs232	printer	serial_printer	no
exp:m2105:rs232	scorpion	scorpion_ic	no
exp:m2105:rs232	loopback	rs232_loopback	no
exp:m2105:rs232	mockingboard	mockingboardd	no
exp:m2105:rs232	msystems_mouse	rs232_mouse_hle_msystems	no
exp:m2105:rs232	nss_tvi	nss_tvinterface	no
exp:m2105:rs232	rs232_sync_io	rs232_sync_io	no
exp:m2105:rs232	pty	pseudo_terminal	no
exp:m2105:centronics	nlq401	nlq401	no
exp:m2105:centronics	smartboard	centronics_smartboard	no
exp:m2105:centronics	chessmec	centronics_chessmec	no
exp:m2105:centronics	samdac	centronics_samdac	no
exp:m2105:centronics	covox_stereo	covox_stereo	no
exp:m2105:centronics	adaptator	adaptator_multitap	no
exp:m2105:centronics	digiblst	cpcdigiblst	no
exp:m2105:centronics	lx800	lx800	no
exp:m2105:centronics	jx80	epson_jx80	no
exp:m2105:centronics	ap2000	ap2000	no
exp:m2105:centronics	ex800	ex800	no
exp:m2105:centronics	fx80	epson_fx80	no
exp:m2105:centronics	rx80	epson_rx80	no
exp:m2105:centronics	mz1p16	mz1p16	no
exp:m2105:centronics	covox	covox	no
exp:m2105:centronics	pl80	comx_pl80	no
exp:m2105:centronics	lx810l	lx810l	no
exp:m2105:centronics	p72	p72	no
exp:m2105:centronics	printer	centronics_printer	yes

configuration

Flow Control

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Flow Control	exp:m2105:modem:null_modem:FLOW_CONTROL	7

setting

name	value	default
Off	0	yes
RTS	1	no
DTR	2	no
XON/XOFF	4	no

CR/LF Input Conversion

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
CR/LF Input Conversion	exp:m2105:modem:null_modem:FLOW_CONTROL	24

setting

name	value	default
Off	0	yes
LF to CR	8	no
CR/LF to CR	16	no
LF to CR/LF	24	no

Delay After CR

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Delay After CR	exp:m2105:modem:null_modem:FLOW_CONTROL	224

setting

name	value	default
None	0	yes
10 ms	32	no
20 ms	64	no
40 ms	96	no
80 ms	128	no
160 ms	160	no
320 ms	192	no
640 ms	224	no

Data Bits

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Data Bits	exp:m2105:modem:null_modem:RS232_DATABITS	255

setting

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

Parity

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Parity	exp:m2105:modem:null_modem:RS232_PARITY	255

setting

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

RX Baud

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
RX Baud	exp:m2105:modem:null_modem: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
76800	23	no
78125	24	no
111900	22	no
115200	13	no

Stop Bits

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Stop Bits	exp:m2105:modem:null_modem: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	exp:m2105:modem:null_modem: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
76800	23	no
78125	24	no
111900	22	no
115200	13	no