PC-9801US - mame (0284) machine

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

machine

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name	sourcefile	sampleof	isbios	isdevice	ismechanical	runnable	description	year	manufacturer	cloneof	romof
pc9801us	nec/pc9801.cpp		no	no	no	yes	PC-9801US	1992	NEC

snap

Key	Length	LastWriteTime	Width	Height	HorizontalResolution	VerticalResolution	PaletteLength	PixelFormat	PropertyItems
pc9801us	1143	29/12/2025 11:31:37	640	400	96	96	0	Format24bppRgb	305:MAME 0.236 (Sep 29 2021)

display

tag	type	rotate	width	height	refresh	pixclock	htotal	hbend	hbstart	vtotal	vbend	vbstart	flipx
screen	raster	0	640	400	56.423135	21052600	848	0	640	440	0	400	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
lrh8a00.bin	524288	a86d8cdb	01c805274ca943c1febedda5ad85ba532aac949c	biosrom	0	good	no
font_ux.rom	288768	19a76eeb	96a006e8515157a624599c2b53a581ae0dd560fd	chargen	0	baddump	no
24256c-x01.bin	32768	28ec1375	9d8e98e703ce0f483df17c79f7e841c5c5cd1692	raw_kanji	0	baddump	no
24256c-x02.bin	32768	90985158	78fb106131a3f4eb054e87e00fe4f41193416d65	raw_kanji	1	baddump	no
24256c-x03.bin	32768	d4893543	eb8c1bee0f694e1e0c145a24152222d4e444e86f	raw_kanji	40000	baddump	no
24256c-x04.bin	32768	5dec0fc2	41000da14d0805ed0801b31eb60623552e50e41c	raw_kanji	40001	baddump	no

chip

type	tag	name	clock
cpu	maincpu	Intel I386SX	15974400
cpu	i8237	AM9517A	15974400
audio	fdc_2hd:0:35hd:flopsndout	Speaker
audio	fdc_2hd:0:35hd:floppysound	Floppy sound	44100
audio	fdc_2hd:1:35hd:flopsndout	Speaker
audio	fdc_2hd:1:35hd:floppysound	Floppy sound	44100
audio	mono	Speaker
audio	cbus:0:pc9801_26:mono	Speaker
audio	cbus:0:pc9801_26:opn	YM2203 OPN	3993600
audio	dac1bit	Filtered DAC
audio	headphone	Speaker
audio	ide2:0:pc98_cd:cdda	CD/DA	44100

softwarelist

tag	name	status	filter
disk_list	pc98	original
disk_orig_list	pc98_flop_orig	original
flop_generic_list	generic_flop_525	compatible	pc98
hdd_list	pc98_hdd	original
cd_list	pc98_cd	original
win_cd_list	generic_cdrom	original

device_ref

tag	name
:maincpu	i386sx
:pit	pit8253
:pit:counter0	pit_counter
:pit:counter1	pit_counter
:pit:counter2	pit_counter
:i8237	am9517a
:pic8259_master	pic8259
:pic8259_slave	pic8259
:ppi_sys	i8255
:ppi_prn	i8255
:sio_kbd	i8251
:kbd_clock	clock
:keyb	pc98_119_kbd
:ppi_mouse	i8255
:mouse_timer	timer
:sio_rs	i8251
:serial	rs232
:memsw	pc98_memsw
:fdc_2hd	upd765a
:fdc_2hd:0	floppy_connector
:fdc_2hd:0:35hd	floppy_35_hd
:fdc_2hd:0:35hd:flopsndout	speaker
:fdc_2hd:0:35hd:floppysound	flopsnd
:fdc_2hd:1	floppy_connector
:fdc_2hd:1:35hd	floppy_35_hd
:fdc_2hd:1:35hd:flopsndout	speaker
:fdc_2hd:1:35hd:floppysound	flopsnd
:disk_list	software_list
:disk_orig_list	software_list
:flop_generic_list	software_list
:screen	screen
:hgdc1	upd7220
:hgdc2	upd7220
:mono	speaker
:gfxdecode	gfxdecode
:cbus	pc98_cbus_root
:cbus:0	pc98_cbus_slot
:cbus:0:pc9801_26	pc9801_26
:cbus:0:pc9801_26:mono	speaker
:cbus:0:pc9801_26:opn	ym2203
:cbus:0:pc9801_26:joy_p1	msx_general_purpose_port
:cbus:0:pc9801_26:joy_p1:joystick	msx_joystick
:cbus:0:pc9801_26:joy_p2	msx_general_purpose_port
:cbus:0:pc9801_26:joy_p2:joystick	msx_joystick
:cbus:1	pc98_cbus_slot
:cbus:2	pc98_cbus_slot
:cbus:3	pc98_cbus_slot
:ipl_bank	address_map_bank
:rtc	upd4990a
:dac1bit	speaker_sound_device
:palette	palette
:headphone	speaker
:ide1	ata_interface
:ide1:0	ata_slot
:ide1:0:hdd	idehd
:ide1:0:hdd:image	harddisk_image
:ide1:1	ata_slot
:ide2	ata_interface
:ide2:0	ata_slot
:ide2:0:pc98_cd	pc98_cd
:ide2:0:pc98_cd:image	cdrom_image
:ide2:0:pc98_cd:cdda	cdda
:ide2:1	ata_slot
:ideirq	ipt_merge_any_hi
:hdd_list	software_list
:cd_list	software_list
:win_cd_list	software_list
:simm	pc9801_54_simm
:simm:2mb	pc9801_54_2mb
:sdip	pc98_sdip

sound

channels
5

device, instance

type	tag	interface	name	briefname
floppydisk	fdc_2hd:0:35hd	floppy_3_5	floppydisk1	flop1
floppydisk	fdc_2hd:1:35hd	floppy_3_5	floppydisk2	flop2
harddisk	ide1:0:hdd:image	ide_hdd,hdd	harddisk	hard
cdrom	ide2:0:pc98_cd:image	cdrom	cdrom	cdrm

device, extension

type	tag	interface	extension_names
floppydisk	fdc_2hd:0:35hd	floppy_3_5	mfi, dfi, mfm, td0, imd, 86f, d77, d88, 1dd, cqm, cqi, dsk, ima, img, ufi, 360, hdm, fdi, fdd, dcp, dcu, dip, nfd
floppydisk	fdc_2hd:1:35hd	floppy_3_5	mfi, dfi, mfm, td0, imd, 86f, d77, d88, 1dd, cqm, cqi, dsk, ima, img, ufi, 360, hdm, fdi, fdd, dcp, dcu, dip, nfd
harddisk	ide1:0:hdd:image	ide_hdd,hdd	chd, hd, hdv, 2mg, hdi
cdrom	ide2:0:pc98_cd:image	cdrom	chd, cue, toc, nrg, gdi, iso, cdr

input

players	coins	service	tilt
3		no	no

control

type	player	buttons	ways	reverse	minimum	maximum	sensitivity	keydelta
mouse	1	3		no	0	255	30	30
keyboard	1	104		no
joy	2	2	8	no
joy	3	2	8	no

port, analog

port_tag	analog_masks
:BIOS_LOAD
:DSW1
:DSW2
:DSW3
:MOUSE_B
:MOUSE_X	255
:MOUSE_Y	255
:cbus:0:pc9801_26:JP6A1_JP6A3
:cbus:0:pc9801_26:JP6A2
:cbus:0:pc9801_26:JP6A4
:cbus:0:pc9801_26:joy_p1:joystick:JOY
:cbus:0:pc9801_26:joy_p2:joystick:JOY
:keyb:KEY0
:keyb:KEY1
:keyb:KEY2
:keyb:KEY3
:keyb:KEY4
:keyb:KEY5
:keyb:KEY6
:keyb:KEY7
:keyb:KEY8
:keyb:KEY9
:keyb:KEYA
:keyb:KEYB
:keyb:KEYC
:keyb:KEYD
:keyb:KEYE
:keyb:KEYF

slot, slotoption

slot_name	slotoption_name	slotoption_devname	slotoption_default
serial	terminal	serial_terminal	no
serial	sunkbd	sunkbd_adaptor	no
serial	votraxtnt	serial_votraxtnt	no
serial	rs_printer	rs_serial_printer	no
serial	dec_loopback	dec_rs232_loopback	no
serial	h19	serial_heath_h19	no
serial	ie15	ie15_terminal	no
serial	null_modem	null_modem	no
serial	keyboard	serial_keyboard	no
serial	patch	rs232_patch_box	no
serial	swtpc8212	swtpc8212_terminal	no
serial	printer	serial_printer	no
serial	scorpion	scorpion_ic	no
serial	loopback	rs232_loopback	no
serial	mockingboard	mockingboardd	no
serial	msystems_mouse	rs232_mouse_hle_msystems	no
serial	nss_tvi	nss_tvinterface	no
serial	rs232_sync_io	rs232_sync_io	no
serial	pty	pseudo_terminal	no
fdc_2hd:0	35hd	floppy_35_hd	yes
fdc_2hd:0	35dd	floppy_35_dd	no
fdc_2hd:0	525hd	floppy_525_hd	no
fdc_2hd:0	525dd	teac_fd_55f	no
fdc_2hd:1	35hd	floppy_35_hd	yes
fdc_2hd:1	35dd	floppy_35_dd	no
fdc_2hd:1	525hd	floppy_525_hd	no
fdc_2hd:1	525dd	teac_fd_55f	no
cbus:0	lha201	lha201	no
cbus:0	pc9801_55u	pc9801_55u	no
cbus:0	pc9801_27	pc9801_27	no
cbus:0	pc9801_14	pc9801_14	no
cbus:0	pc9801_118	pc9801_118	no
cbus:0	fdd_2dd	pc98_fdd_2dd	no
cbus:0	fdd_2hd	pc98_fdd_2hd	no
cbus:0	pc9801_86	pc9801_86	no
cbus:0	speakboard	speakboard	no
cbus:0	lgy98	lgy98	no
cbus:0	wavestar	qvision_wavestar	no
cbus:0	amd98	amd98	no
cbus:0	mpu_pc98	mpu_pc98	no
cbus:0	pc9801_26	pc9801_26	yes
cbus:0	sb16	sb16_ct2720	no
cbus:0	sound_orchestra	sound_orchestra	no
cbus:0	pc9801_55l	pc9801_55l	no
cbus:0	otomichan_kai	pc98_otomichan_kai	no
cbus:0:pc9801_26:joy_p1	vaus	msx_vaus	no
cbus:0:pc9801_26:joy_p1	townspad	msx_townspad	no
cbus:0:pc9801_26:joy_p1	towns6b	msx_towns6b	no
cbus:0:pc9801_26:joy_p1	sega	msx_segactrl	no
cbus:0:pc9801_26:joy_p1	mouse	msx_mouse	no
cbus:0:pc9801_26:joy_p1	magickey	msx_magickey	no
cbus:0:pc9801_26:joy_p1	libbler	msx_libblerpad	no
cbus:0:pc9801_26:joy_p1	martypad	msx_martypad	no
cbus:0:pc9801_26:joy_p1	joystick	msx_joystick	yes
cbus:0:pc9801_26:joy_p1	xe1ap	msx_xe1ap	no
cbus:0:pc9801_26:joy_p1	hypershot	msx_hypershot	no
cbus:0:pc9801_26:joy_p2	vaus	msx_vaus	no
cbus:0:pc9801_26:joy_p2	townspad	msx_townspad	no
cbus:0:pc9801_26:joy_p2	towns6b	msx_towns6b	no
cbus:0:pc9801_26:joy_p2	sega	msx_segactrl	no
cbus:0:pc9801_26:joy_p2	mouse	msx_mouse	no
cbus:0:pc9801_26:joy_p2	magickey	msx_magickey	no
cbus:0:pc9801_26:joy_p2	libbler	msx_libblerpad	no
cbus:0:pc9801_26:joy_p2	martypad	msx_martypad	no
cbus:0:pc9801_26:joy_p2	joystick	msx_joystick	yes
cbus:0:pc9801_26:joy_p2	xe1ap	msx_xe1ap	no
cbus:0:pc9801_26:joy_p2	hypershot	msx_hypershot	no
cbus:1	lha201	lha201	no
cbus:1	pc9801_55u	pc9801_55u	no
cbus:1	pc9801_27	pc9801_27	no
cbus:1	pc9801_14	pc9801_14	no
cbus:1	pc9801_118	pc9801_118	no
cbus:1	fdd_2dd	pc98_fdd_2dd	no
cbus:1	fdd_2hd	pc98_fdd_2hd	no
cbus:1	pc9801_86	pc9801_86	no
cbus:1	speakboard	speakboard	no
cbus:1	lgy98	lgy98	no
cbus:1	wavestar	qvision_wavestar	no
cbus:1	amd98	amd98	no
cbus:1	mpu_pc98	mpu_pc98	no
cbus:1	pc9801_26	pc9801_26	no
cbus:1	sb16	sb16_ct2720	no
cbus:1	sound_orchestra	sound_orchestra	no
cbus:1	pc9801_55l	pc9801_55l	no
cbus:1	otomichan_kai	pc98_otomichan_kai	no
cbus:2	lha201	lha201	no
cbus:2	pc9801_55u	pc9801_55u	no
cbus:2	pc9801_27	pc9801_27	no
cbus:2	pc9801_14	pc9801_14	no
cbus:2	pc9801_118	pc9801_118	no
cbus:2	fdd_2dd	pc98_fdd_2dd	no
cbus:2	fdd_2hd	pc98_fdd_2hd	no
cbus:2	pc9801_86	pc9801_86	no
cbus:2	speakboard	speakboard	no
cbus:2	lgy98	lgy98	no
cbus:2	wavestar	qvision_wavestar	no
cbus:2	amd98	amd98	no
cbus:2	mpu_pc98	mpu_pc98	no
cbus:2	pc9801_26	pc9801_26	no
cbus:2	sb16	sb16_ct2720	no
cbus:2	sound_orchestra	sound_orchestra	no
cbus:2	pc9801_55l	pc9801_55l	no
cbus:2	otomichan_kai	pc98_otomichan_kai	no
cbus:3	lha201	lha201	no
cbus:3	pc9801_55u	pc9801_55u	no
cbus:3	pc9801_27	pc9801_27	no
cbus:3	pc9801_14	pc9801_14	no
cbus:3	pc9801_118	pc9801_118	no
cbus:3	fdd_2dd	pc98_fdd_2dd	no
cbus:3	fdd_2hd	pc98_fdd_2hd	no
cbus:3	pc9801_86	pc9801_86	no
cbus:3	speakboard	speakboard	no
cbus:3	lgy98	lgy98	no
cbus:3	wavestar	qvision_wavestar	no
cbus:3	amd98	amd98	no
cbus:3	mpu_pc98	mpu_pc98	no
cbus:3	pc9801_26	pc9801_26	no
cbus:3	sb16	sb16_ct2720	no
cbus:3	sound_orchestra	sound_orchestra	no
cbus:3	pc9801_55l	pc9801_55l	no
cbus:3	otomichan_kai	pc98_otomichan_kai	no
ide1:0	px320a	px320a	no
ide1:0	zip100	zip100_ide	no
ide1:0	cr589	cr589	no
ide1:0	cp2024	cp2024	no
ide1:0	xm3301	xm3301	no
ide1:0	cf	atacf	no
ide1:0	cdrom	cdrom	no
ide1:0	hdd	idehd	yes
ide1:1	px320a	px320a	no
ide1:1	zip100	zip100_ide	no
ide1:1	cr589	cr589	no
ide1:1	cp2024	cp2024	no
ide1:1	xm3301	xm3301	no
ide1:1	cf	atacf	no
ide1:1	cdrom	cdrom	no
ide1:1	hdd	idehd	no
ide2:0	pc98_cd	pc98_cd	yes
ide2:1	pc98_cd	pc98_cd	no
simm	15mb	pc9801_54_15mb	no
simm	9mb	pc9801_54_9mb	no
simm	8mb	pc9801_54_8mb	no
simm	7mb	pc9801_54_7mb	no
simm	4mb	pc9801_54_4mb	no
simm	2mb	pc9801_54_2mb	yes

configuration

Load IDE BIOS

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Load IDE BIOS	BIOS_LOAD	4

setting

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

PC-9801-26: Interrupt level

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
PC-9801-26: Interrupt level	cbus:0:pc9801_26:JP6A1_JP6A3	3

setting

name	value	default
INT0 (IRQ3)	0	no
INT41 (IRQ10)	2	no
INT5 (IRQ12)	3	yes
INT6 (IRQ13)	1	no

PC-9801-26: Sound ROM address

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
PC-9801-26: Sound ROM address	cbus:0:pc9801_26:JP6A2	7

setting

name	value	default
0xc8000	0	no
0xcc000	1	yes
0xd0000	2	no
0xd4000	3	no
Disable ROM	4	no

PC-9801-26: Port Base

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
PC-9801-26: Port Base	cbus:0:pc9801_26:JP6A4	1

setting

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
0x088	0	no
0x188	1	yes

dipswitch

Display Type

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Display Type	DSW1	1

location

name	number	inverted
SW1	1	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Normal Display (15KHz)	0	no
Hi-Res Display (24KHz)	1	yes

Unknown

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unknown	DSW1	2

location

name	number	inverted
SW1	2	no

value

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

Monitor Type

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Monitor Type	DSW1	4

location

name	number	inverted
SW1	3	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
RGB	4	yes
Plasma	0	no

Unknown

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unknown	DSW1	8

location

name	number	inverted
SW1	4	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	8	yes
On	0	no

Unknown

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unknown	DSW1	16

location

name	number	inverted
SW1	5	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	16	yes
On	0	no

Unknown

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unknown	DSW1	32

location

name	number	inverted
SW1	6	no

value

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

Unknown

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unknown	DSW1	64

location

name	number	inverted
SW1	7	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	0	yes
On	64	no

Graphic Function

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Graphic Function	DSW1	128

location

name	number	inverted
SW1	8	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Basic (8 Colors)	128	no
Expanded (16/4096 Colors)	0	yes

System Specification

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
System Specification	DSW2	1

location

name	number	inverted
SW2	1	no

value

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

Terminal Mode

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Terminal Mode	DSW2	2

location

name	number	inverted
SW2	2	no

value

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

Text width

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Text width	DSW2	4

location

name	number	inverted
SW2	3	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
40 chars/line	4	no
80 chars/line	0	yes

Text height

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Text height	DSW2	8

location

name	number	inverted
SW2	4	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
20 lines/screen	8	no
25 lines/screen	0	yes

Memory Switch Init

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Memory Switch Init	DSW2	16

location

name	number	inverted
SW2	5	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
No	0	yes
Yes	16	no

Unused

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unused	DSW2	32

location

name	number	inverted
SW2	6	no

value

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

Unused

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unused	DSW2	64

location

name	number	inverted
SW2	7	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	64	yes
On	0	no

GDC clock

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
GDC clock	DSW2	128

location

name	number	inverted
SW2	8	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
2.5 MHz	128	yes
5 MHz	0	no

FDD Fix Mode

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
FDD Fix Mode	DSW3	1

location

name	number	inverted
SW3	1	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Auto-Detection	0	no
Fixed	1	yes

FDD Density Select

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
FDD Density Select	DSW3	2

location

name	number	inverted
SW3	2	yes

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
2DD	0	no
2HD	2	yes

Unused

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unused	DSW3	4

location

name	number	inverted
SW3	3	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	4	yes
On	0	no

Unused

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unused	DSW3	8

location

name	number	inverted
SW3	4	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	8	yes
On	0	no

Unused

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unused	DSW3	16

location

name	number	inverted
SW3	5	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	16	yes
On	0	no

Conventional RAM size

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Conventional RAM size	DSW3	32

location

name	number	inverted
SW3	6	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
640 KB	32	yes
512 KB	0	no

Unused

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unused	DSW3	64

location

name	number	inverted
SW3	7	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	64	yes
On	0	no

CPU Type

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
CPU Type	DSW3	128

location

name	number	inverted
SW3	8	no

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
V30	128	no
I386	0	yes