DOSBox, an x86 emulator with DOS

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Game details

JetFighter - Velocity (1990)
Tested By: Winter

runnable - playable - supported

DOSBox version: 0.73 (supported)

runnable - playable - supported

0% supported

DOSBox version: 0.65 (broken)

runnable - playable - supported

0% supported

DOSBox version: 0.63 (broken)

real hardware 486 (2022-02-05 22:39)

zodiac

To get this game to run on a real 486 DX2, I have to use moslo. The divide by zero error is related to speed of the processor. So DosBox is emulating this correctly with equivalent cycles.

Divide by zero (2014-09-08 06:52)

opcode

You still having divide by zero error on startup?

Jetfighter Disk (2012-04-19 19:55)

BJSloth

I found my original Jetfighter! disk. The files all seem to be there, but when I try to run in DosBox 0.74 I get error 2003: Integer divide by zero Error
Any hints out there?

Jetfighter finally works!!! (2010-01-13 00:36)

opcode

I have confirmed this by editing my ~/.dosbox/dosbox-0.73.conf file and changing cputype from "auto" to "386_prefetch" and it works perfectly.

I am happy this old game works now.

it works in DOSBox 0.73 (2010-01-09 16:19)

Petersilientroll

cputype=386_prefetch

:-D

Prefetch queue (2006-08-16 18:24)

dsimcha

This game actually works with an unofficial DOSBox build that supports the buggy prefetch queue from early x86 CPUs. I have verified this personally. See http://vogons.zetafleet.com/viewtopic.php?t=12963

Clock Doubled CPUs? (2006-07-20 21:40)

dsimcha

I remember reading in the manual for this game back in the day that it will not run on some 486 DX-2 CPUs. I can't even get it to work under pure MS-DOS 5 on any CPU I've had since a 386SX. Could it be that this game makes use of some weird "feature" only found on CPUs that have clock speeds equal to the system bus speed? If so, could DOSBox somehow emulate this?

Game not even runnable (2006-05-22 02:16)

mad.and.insane

now it exited telling me in stdout.txt this:
Exit to error: CPU:GRP5:Illegal Call 7

Game not even runnable (2006-05-22 02:12)

mad.and.insane

the title screen is not part of the game, starting it as "jf.exe B" will show that it WONT BUDGE at all.

Note: (2005-02-28 23:53)

Winter

Doesn't respond after title screen.

Game directory (browsing from J)

Game:	Year:	Version:	Status:
J-Bird	1983	0.74-3	supported
Jabato	1989	0.73	supported
Jack Flash - Mutiny of the Things	1995	0.72	supported
Jack in the Dark	1993	0.74-3	supported
Jack Nicklaus Golf Sign. Edition	1992	0.58	supported
Jack Nicklaus Unlimited Golf	1990	0.73	supported
Jack Nicklaus' Greatest 18 Holes...	1988	0.70	supported
Jack Orlando	1996	0.73	supported
Jack the Ripper	1994	0.70	supported
Jagged Alliance	1994	0.73	supported
Jagged Alliance - deadly games	1996	0.63	supported
Jahangir Khan's WC Squash	1991	0.73	supported
Jai Alai	1991	0.73	supported
James Bond 007 - A View to a Kill	1985	0.74-3	supported
James Pond 2	1993	0.74-3	supported
Jammit	1994	0.73	supported
Janitor Joe	1985	0.61	supported
Javelin 2000	1999	0.61	supported
Jaws	1989	0.61	supported
Jazz Jack Rabbit Xmas 1994	1994	0.65	supported
Jazz Jack Rabbit Xmas 1995	1995	0.63	supported
Jazz Jackrabbit	1994	0.74-3	supported
Jazz Jackrabbit Holiday Hare 94/95	1995	0.74-3	supported
JBC Casino	1998	0.74-3	supported
JBM 6.0	1996	0.58	supported
JCGS (神示祿)	1995	0.63	supported
Jeopardy!	1987	0.61	supported
Jeopardy!	1988	0.61	supported
Jeopardy! Junior Edition	1989	0.61	supported
Jeopardy! Second Edition	1990	0.73	supported
Jesus of Nazareth	2005	0.74-3	supported
Jet 2.0	1985	0.73	supported
Jet Set Willy	1999	0.74-3	supported
Jet Strike	1995	0.70	supported
JetFighter	1990	0.73	supported
JetFighter 3	1997	0.73	supported
Jetfighter II	1990	0.74-3	supported
Jetpack	1993	0.73	supported
Jetpack v1.5	1993	0.63	supported
Jetpack(Prototype)	1993	0.63	supported
Jill of the Jungle	1992	0.74-3	supported
Jill of the Jungle 2	1992	0.73	supported
Jill of the Jungle 3	1992	0.70	supported
Jim Power	1993	0.73	supported
Jimmy White's Whirlwind Snooker	1991	0.61	supported
Jinxter	1987	0.65	supported
Jo Guest in The Milk Round	1993	0.74-3	supported
Joan of Arc	1989	0.61	supported
Joe Montana Football	1990	0.74-3	supported
Joe Montana Football (Floppy Disk)	1990	0.74-3	supported
John Elway's Quarterback	1987	0.61	supported
John Madden Football	1989	0.61	supported
Johnny Bazookatone	1997	0.74-3	broken
Jonathan	1993	0.74-3	supported
Jones in the Fast Lane	1990	0.60	supported
Jones In The Fast Lane (CD Version)	1990	0.63	supported
Journey	1989	0.61	supported
Journey to the Center of the Earth	1990	0.74-3	supported
Joust	1983	0.70	supported
Jr. Pac-Man	1988	0.72	supported
Judge Dredd	1997	0.73	supported
Judge Dredd Pinball	1998	0.72	supported
Jump 'n Bump	1998	0.70	supported
Jumpjet 1.07	1990	0.72	supported
Jumpman	1983	0.61	supported
Jumpman Lives!	1991	0.74-3	supported
Jungle Hunt	1984	0.74-3	supported
Jungle Strike	1995	0.72	supported
Jurassic Park	1992	0.74-3	supported
Jurassic War	1997	0.72	supported

Compatibility statistics (3929 games in database)

Version:	Games broken:	Games runnable:	Games playable:	Games supported:
DOSBox 0.74-3 (1255)	16 (1.27%)	34 (2.71%)	48 (3.82%)	1157 (92.19%)
DOSBox 0.73 (644)	16 (2.48%)	23 (3.57%)	17 (2.64%)	588 (91.30%)
DOSBox 0.72 (722)	45 (6.23%)	24 (3.32%)	31 (4.29%)	622 (86.15%)
DOSBox 0.71 (164)	29 (17.68%)	12 (7.32%)	8 (4.88%)	115 (70.12%)
DOSBox 0.70 (952)	23 (2.42%)	17 (1.79%)	29 (3.05%)	883 (92.75%)
DOSBox 0.65 (727)	39 (5.36%)	30 (4.13%)	41 (5.64%)	617 (84.87%)
DOSBox 0.63 (918)	76 (8.28%)	45 (4.90%)	46 (5.01%)	751 (81.81%)
DOSBox 0.62 (394)	56 (14.21%)	24 (6.09%)	27 (6.85%)	287 (72.84%)
DOSBox 0.61 (998)	87 (8.72%)	59 (5.91%)	68 (6.81%)	784 (78.56%)
DOSBox 0.60 (774)	108 (13.95%)	73 (9.43%)	72 (9.30%)	521 (67.31%)
DOSBox 0.58 (1149)	266 (23.15%)	15 (1.31%)	20 (1.74%)	848 (73.80%)

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DOSBox Manual

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