TI-99/4A Home Computer (US) - 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
ti99_4a	ti/ti99_4x.cpp		no	no	no	yes	TI-99/4A Home Computer (US)	1981	Texas Instruments

snap

Key	Length	LastWriteTime	Width	Height	HorizontalResolution	VerticalResolution	PaletteLength	PixelFormat	PropertyItems
ti99_4a	1590	29/12/2025 11:31:47	280	216	96	96	0	Format24bppRgb	305:MAME 0.179 (Oct 26 2016)

display

tag	type	rotate	width	height	refresh	pixclock	htotal	hbend	hbstart	vtotal	vbend	vbstart	flipx
screen	raster	0	280	216	59.922738	5369317	342	25	305	262	28	244	no

driver

status	emulation	savestate	requiresartwork	unofficial	nosoundhardware	incomplete	cocktail
good	good	supported	no	no	no	no

rom

name	size	crc	sha1	region	offset	status	optional
994a_rom_hb.u610	4096	ee859c5f	a45245707c3dccea902b718554a882d214a82504	console_rom	0	good	no
994a_rom_lb.u611	4096	37859301	f4e774fd5913b387a763f1b8de5524c54b255434	console_rom	1	good	no
994a_grom0.u500	6144	2445a5e8	ea15d8b0ac52112dc0d5f4ab9a79ac8ca1cc1bbc	cons_grom	0	good	no
994a_grom1.u501	6144	b8f367ab	3ecead4b83ec525084c70b6123d4053f8a80e1f7	cons_grom	2000	good	no
994a_grom2.u502	6144	e0bb5341	e255f0d65d69b927cecb8fcfac7a4c17d585ea96	cons_grom	4000	good	no

chip

type	tag	name	clock
cpu	maincpu	Texas Instruments TMS9900	3000000
audio	cass_out	Speaker
audio	cassette1	Cassette
audio	cassette2	Cassette
audio	sound_out	Speaker
audio	soundchip	SN94624	447443

softwarelist

tag	name	status	filter
cart_list_ti99	ti99_cart	original

device_ref

tag	name
:maincpu	tms9900
:tms9901	tms9901
:datamux_16_8	ti99_datamux
:gromport	gromport
:gromport:single	ti99_scartconn
:gromport:single:cartridge	ti99cart
:gromport:single:cartridge:grom3	grom
:gromport:single:cartridge:grom4	grom
:gromport:single:cartridge:grom5	grom
:gromport:single:cartridge:grom6	grom
:gromport:single:cartridge:grom7	grom
:scratchpad	ram
:internal_32k_mod	ram
:cart_list_ti99	software_list
:cass_out	speaker
:cassette1	cassette_image
:cassette2	cassette_image
:console_grom_0	grom
:console_grom_1	grom
:console_grom_2	grom
:ioport	ti99_ioport
:sound_out	speaker
:soundchip	sn94624
:joyport	ti99_joyport
:joyport:twinjoy	ti99_twinjoy
:vdp	tms9918a
:screen	screen

sound

channels
2

device, instance

type	tag	interface	name	briefname
cartridge	gromport:single:cartridge	ti99_cart	cartridge	cart
cassette	cassette1		cassette1	cass1
cassette	cassette2		cassette2	cass2

device, extension

type	tag	interface	extension_names
cartridge	gromport:single:cartridge	ti99_cart	rpk
cassette	cassette1		wav, flac
cassette	cassette2		wav, flac

input

players	coins	service	tilt
2		no	no

control

type	player	buttons	ways	reverse
joy	1	1	8	no
keyboard	1	49		no
joy	2	1	8	no

port, analog

port_tag	analog_masks
:ALPHA
:ALPHA1
:ALPHABUG
:COL0
:COL1
:COL2
:COL3
:COL4
:COL5
:LOADINT
:datamux_16_8:GROMENA
:datamux_16_8:RAM
:gromport:CARTRESET
:joyport:twinjoy:JOY1
:joyport:twinjoy:JOY2

slot, slotoption

slot_name	slotoption_name	slotoption_devname	slotoption_default
gromport	gkracker	ti99_gkracker	no
gromport	multi	ti99_mcartconn	no
gromport	single	ti99_scartconn	yes
ioport	speechsyn	ti99_speech	no
ioport	arcturus	ti99_arcturus	no
ioport	splitter	ti99_iosplit	no
ioport	peb	peribox	no
joyport	mecmouse	ti99_mecmouse	no
joyport	twinjoy	ti99_twinjoy	yes

configuration

Alpha Lock blocks joystick up

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Alpha Lock blocks joystick up	ALPHABUG	1

setting

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

Console GROMs

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Console GROMs	datamux_16_8:GROMENA	1

setting

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

Console 32 KiB RAM upgrade (16 bit)

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Console 32 KiB RAM upgrade (16 bit)	datamux_16_8:RAM	1

setting

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

RESET on cartridge insert

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
RESET on cartridge insert	gromport:CARTRESET	1

setting

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