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Lucas Arts Games keep crashing on my AMD5x86 P75 setup

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First post, by Jackhead

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Im running a DOS6.22 system with a P75 CPU.
Anything working just fine so far. But i notice that i got system freezes particular on older Lucas Arts Games, for example Indiana Jones Atalantis or Day of the Tentacle.
Im playing the Games with Midi and SoundBlaster Combo.
When that crash happen, the SB sound crackle a bit and the Midi still playing fine. System freeze than.

First i was thinking its because the fast CPU for that kind of Games. But even with disabled L1, CPU Cache and turbo disabled (cpu bench say 30MHz 386 speed) it keeps crashing.
Any other "non" Lucas Arts games i testet work just fine.

My Sound Card is a CT2230 SB16 load with 220/5/1.

Any idea why Lucas Arts dont like my setup? My start values for Indiana Jones for example: "atlantis s220/5/8 r" (8 is the buffer).

Last edited by Jackhead on 2026-01-26, 19:48. Edited 1 time in total.

Dos 6.22: Asus VL/I-486SV2GX4 Rev 2.0 1Mb L2 - A5x86 X5 P75 - 64MB - AHA-2842A VLB - ET4000W32P VLB - CT2230 - MPU-401AT with YucatanFX / Roland CM64
Win98SE: Asus P5K-WS - E8600 @ 4,5GHz - Strange God Voodoo 5 6000 PCI-X - 2GB DDR2 1066 - Audigy 2 ZS

Reply 1 of 8, by Beerfloat

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Just in general when something is flaky or marginal, might be good to try disabling L2 cache, or turning off writeback, or setting less aggressive memory timings, or swapping out memory modules, trying different memory slots, making sure ISA bus is not overclocked..

Reply 2 of 8, by NeoG_

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If you are using a PS/2 mouse try cutemouse 2.0a4 as your mouse driver

98/DOS Rig: BabyAT AladdinV, K6-2+/550, V3 2000, 128MB PC100, 20GB HDD, 128GB SD2IDE, SB Live!, SB16-SCSI, PicoGUS, WP32 McCake, iNFRA CD, ZIP100
XP Rig: Lian Li PC-10 ATX, Gigabyte X38-DQ6, Core2Duo E6850, ATi HD5870, 2GB DDR2, 2TB HDD, X-Fi XtremeGamer

Reply 3 of 8, by Jackhead

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Yes I think I'm using 1.9 CT mouse. Would try it today. Looks like that happen only to LUCAS arts talkie versions.

Dos 6.22: Asus VL/I-486SV2GX4 Rev 2.0 1Mb L2 - A5x86 X5 P75 - 64MB - AHA-2842A VLB - ET4000W32P VLB - CT2230 - MPU-401AT with YucatanFX / Roland CM64
Win98SE: Asus P5K-WS - E8600 @ 4,5GHz - Strange God Voodoo 5 6000 PCI-X - 2GB DDR2 1066 - Audigy 2 ZS

Reply 4 of 8, by Jackhead

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I tryed the version 2.0 alpha4. But my mouse don't like it. Driver loaded fine, but when I move my mouse it stock in a corner and don't move any more.

Dos 6.22: Asus VL/I-486SV2GX4 Rev 2.0 1Mb L2 - A5x86 X5 P75 - 64MB - AHA-2842A VLB - ET4000W32P VLB - CT2230 - MPU-401AT with YucatanFX / Roland CM64
Win98SE: Asus P5K-WS - E8600 @ 4,5GHz - Strange God Voodoo 5 6000 PCI-X - 2GB DDR2 1066 - Audigy 2 ZS

Reply 5 of 8, by NeoG_

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Jackhead wrote on 2026-01-28, 06:47:

I tryed the version 2.0 alpha4. But my mouse don't like it. Driver loaded fine, but when I move my mouse it stock in a corner and don't move any more.

Ah that's a shame, it means that the direct hardware access method for the PS/2 port doesn't seem to work. Hopefully the issue isn't using BIOS PS/2 mouse routines and sound blaster at the same time on that system because ctmouse 2.0a4 is the saving grace for that.

There is a way to check if the mouse+soundblaster is the root cause - Start the games in keyboard only mode and see if they still crash. If they do you can move on to other potential solutions.

98/DOS Rig: BabyAT AladdinV, K6-2+/550, V3 2000, 128MB PC100, 20GB HDD, 128GB SD2IDE, SB Live!, SB16-SCSI, PicoGUS, WP32 McCake, iNFRA CD, ZIP100
XP Rig: Lian Li PC-10 ATX, Gigabyte X38-DQ6, Core2Duo E6850, ATi HD5870, 2GB DDR2, 2TB HDD, X-Fi XtremeGamer

Reply 6 of 8, by Jackhead

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With other solutions you mean another mouse driver? Any suggestions?
Or should I switch to serial port for the mouse? And yes without mouse the game don't crash. I'm pretty sure that is exactly my problem.

Dos 6.22: Asus VL/I-486SV2GX4 Rev 2.0 1Mb L2 - A5x86 X5 P75 - 64MB - AHA-2842A VLB - ET4000W32P VLB - CT2230 - MPU-401AT with YucatanFX / Roland CM64
Win98SE: Asus P5K-WS - E8600 @ 4,5GHz - Strange God Voodoo 5 6000 PCI-X - 2GB DDR2 1066 - Audigy 2 ZS

Reply 7 of 8, by NeoG_

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Jackhead wrote on 2026-01-28, 11:32:

With other solutions you mean another mouse driver? Any suggestions?
Or should I switch to serial port for the mouse? And yes without mouse the game don't crash. I'm pretty sure that is exactly my problem.

Microsoft mouse is big but could help as it tends to be more compatible, but less of a fix than ctmouse 2.0a4. For me it made the crashes much less likely but didn't completely solve it. A serial mouse would probably work too since the mouse driver normally communicates directly with the serial port.

98/DOS Rig: BabyAT AladdinV, K6-2+/550, V3 2000, 128MB PC100, 20GB HDD, 128GB SD2IDE, SB Live!, SB16-SCSI, PicoGUS, WP32 McCake, iNFRA CD, ZIP100
XP Rig: Lian Li PC-10 ATX, Gigabyte X38-DQ6, Core2Duo E6850, ATi HD5870, 2GB DDR2, 2TB HDD, X-Fi XtremeGamer

Reply 8 of 8, by Jackhead

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I installed the MS Mouse Driver 11 and all problems gone.
Not the smallest driver but it's working..

Dos 6.22: Asus VL/I-486SV2GX4 Rev 2.0 1Mb L2 - A5x86 X5 P75 - 64MB - AHA-2842A VLB - ET4000W32P VLB - CT2230 - MPU-401AT with YucatanFX / Roland CM64
Win98SE: Asus P5K-WS - E8600 @ 4,5GHz - Strange God Voodoo 5 6000 PCI-X - 2GB DDR2 1066 - Audigy 2 ZS

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