BBC Micro Model A - mame (0280) machine

MAME: 0280 - Released: 2025-08-29T22:26:57 - Lists: 731 - Software: 139884 - rom: 235974 - disk: 11384

machine

• XML • JSON • AO

name	sourcefile	sampleof	isbios	isdevice	ismechanical	runnable	description	year	manufacturer	cloneof	romof
bbca	acorn/bbcb.cpp	bbc	no	no	no	yes	BBC Micro Model A	1981	Acorn Computers	bbcb	bbcb

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
imperfect	good	unsupported	no	no	no	no

rom

name	size	crc	sha1	region	offset	status	optional	merge	bios
os12.rom	16384	3c14fc70	0d9bcaf6a393c9ce2359ed700ddb53c232c2c45d	mos	0	good	no	os12.rom	120
os10.rom	16384	9679b8f8	d35f6723132aabe3c4d00fc16fd9ecc6768df753	mos	0	good	no	os10.rom	100
os092.rom	16384	59ef7eb8	dca33995c0d008a527efe923d03333394b01022c	mos	0	good	no	os092.rom	092
os01.rom	16384	45ee0980	4b0ece6dc139d5d3f4fabd023716fb6f25149b80	mos	0	good	no	os01.rom	010
basic2.rom	16384	79434781	4a7393f3a45ea309f744441c16723e2ef447a281	rom	c000	good	no	basic2.rom	120
basic2.rom	16384	79434781	4a7393f3a45ea309f744441c16723e2ef447a281	rom	c000	good	no	basic2.rom	100
basic1.rom	16384	b3364108	890f6e3e7fab3340f75b85e93ff29332bc9ecb2e	rom	c000	good	no	basic1.rom	092
basic1.rom	16384	b3364108	890f6e3e7fab3340f75b85e93ff29332bc9ecb2e	rom	0	good	no	basic1.rom	010

chip

type	tag	name	clock
cpu	maincpu	MOS Technology 6502	2000000
audio	mono	Speaker
audio	sn	SN76489A	4000000
audio	samples	Samples
audio	cassette	Cassette

softwarelist

tag	name	status	filter
cass_ls	bbc_cass	original	A
rom_ls	bbc_rom	original	B

device_ref

name
m6502
ipt_merge_any_hi
ram
screen
palette
saa5050
hd6845s
ls259
mos6522
bbc_kbd
speaker
sn76489a
samples
cassette_image
acia6850
serproc
rs232
bbc_romslot16
bbc_romslot16
bbc_romslot16
bbc_romslot16
software_list
software_list

sample

name
motoroff
motoron

biosset

name	description	default
120	OS 1.20	no
100	OS 1.00	no
092	OS 0.92	no
010	OS 0.10	no

sound

channels
1

feature

type	status	overall
graphics	imperfect

ramoption

name	default
32K
16K	yes

device, instance

type	tag	interface	name	briefname
cassette	cassette	bbc_cass	cassette	cass
romimage	romslot0	bbc_rom	romimage1	rom1
romimage	romslot1	bbc_rom	romimage2	rom2
romimage	romslot2	bbc_rom	romimage3	rom3
romimage	romslot3	bbc_rom	romimage4	rom4

device, extension

type	tag	interface	extension_names
cassette	cassette	bbc_cass	wav, flac, csw, uef
romimage	romslot0	bbc_rom	rom, bin
romimage	romslot1	bbc_rom	rom, bin
romimage	romslot2	bbc_rom	rom, bin
romimage	romslot3	bbc_rom	rom, bin

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
:BBCCONFIG
:kbd:BREAK
:kbd:COL0
:kbd:COL1
:kbd:COL10
:kbd:COL11
:kbd:COL12
:kbd:COL13
:kbd:COL14
:kbd:COL15
:kbd:COL2
:kbd:COL3
:kbd:COL4
:kbd:COL5
:kbd:COL6
:kbd:COL7
:kbd:COL8
:kbd:COL9

slot, slotoption

slot_name	slotoption_name	slotoption_devname	slotoption_default
rs423	terminal	serial_terminal	no
rs423	sunkbd	sunkbd_adaptor	no
rs423	dec_loopback	dec_rs232_loopback	no
rs423	ie15	ie15_terminal	no
rs423	null_modem	null_modem	no
rs423	keyboard	serial_keyboard	no
rs423	patch	rs232_patch_box	no
rs423	swtpc8212	swtpc8212_terminal	no
rs423	printer	serial_printer	no
rs423	scorpion	scorpion_ic	no
rs423	loopback	rs232_loopback	no
rs423	mockingboard	mockingboardd	no
rs423	msystems_mouse	rs232_mouse_hle_msystems	no
rs423	nss_tvi	nss_tvinterface	no
rs423	rs232_sync_io	rs232_sync_io	no
rs423	pty	pseudo_terminal	no
rs423	votraxtnt	serial_votraxtnt	no
rs423	rs_printer	rs_serial_printer	no
romslot0	ram	bbc_ram	no
romslot1	ram	bbc_ram	no
romslot2	ram	bbc_ram	no
romslot3	ram	bbc_ram	no

configuration

Monitor

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Monitor	BBCCONFIG	3	BBCCONFIG	8	eq	0

setting

name	value	default
Colour	0	yes
B&W	1	no
Green	2	no
Amber	3	no

Econet

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Econet	BBCCONFIG	4

setting

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

VideoNuLA

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
VideoNuLA	BBCCONFIG	8

setting

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

dipswitch

Default File System

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Default File System	kbd:COL2	1

location

name	number	inverted
KBD	1	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
NFS	0	no
DFS	1	yes

Not Used

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Not Used	kbd:COL3	1

location

name	number	inverted
KBD	2	no

value

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

Disc Timings

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Disc Timings	kbd:COL4	1

location

name	number	inverted
KBD	3	no

value

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

Disc Timings

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Disc Timings	kbd:COL5	1

location

name	number	inverted
KBD	4	no

value

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

Boot

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Boot	kbd:COL6	1

location

name	number	inverted
KBD	5	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
BREAK	0	no
SHIFT-BREAK	1	yes

Screen Mode

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Screen Mode	kbd:COL7	1

location

name	number	inverted
KBD	6	no

value

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

Screen Mode

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Screen Mode	kbd:COL8	1

location

name	number	inverted
KBD	7	no

value

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

Screen Mode

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Screen Mode	kbd:COL9	1

location

name	number	inverted
KBD	8	no

value

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