v4.2.0 R3 - Freeze on high res monochrome and Big display size

[Javi]

Hi Steven,

I came across an issue with Steem SSE v4.2.0 R3 (Win64, D3D, not debugger): when configuring to emulate a high res monochrome monitor, with normal borders on and setting the display to be in Windowed Mode in either "Big" or "Biggest" size and not checking the "Stretch" options, the emulation runs very slow and Steem appears to freeze. In addition, when setting that configuration, I occasionally get an error indicating "System exception SC0000005 at S0000000140081302 in Steem64D3D.exe" - please see screenshot. If checking the "Stretch" option, the emulation runs correctly.

I am running Windows 11 on an Intel 14600K and an Nvidia RTX 4070 Ti Super. Below are the contents of my TRACE.txt.

TRACE 09/09/25 20:31:10
Steem SSE v4.2.0 R3 64bit (built Aug 24 2025 - 10:41:38) 
VC1500 D3D9
Windows v10.0.26100 64bit 
thread $45D0
Command-line: "Steem64D3D.exe" 
steem.ini $7
Load pasti: 0000000000000000 ERROR 126
disk image list.txt 1
Load Tos104uk.img v104/7 CRC32 A50D1D43
Load plugins64\ArchiveAccess: 0000000180000000 ERROR 0
Load unrar64: 0000000000000000 ERROR 126
Load plugins64\CAPSImg: 00007FFB324D0000 ERROR 0
Load stvl64: 0000000000000000 ERROR 126
Load FreeImage: 0000000000000000 ERROR 126
Load d3d9sweetfx: 0000000000000000 ERROR 126
D3D type 1 flags $50 i8000000F
unrar64 0 unzipd32 0 ArchiveAccess 1 CAPSImg 1 pasti 0 FreeImage 0 stvl64 0
Load steem.ini
D3D Create 0:640x400 b0 F22 i80000000 S1 VS0 59Hz ERROR 0
D3D Reset 0:640x400 b0 F22 i80000000 S1 VS0 59Hz ERROR 0
D3D Reset 0:1536x1080 b0 F22 i80000000 S1 VS0 59Hz ERROR 0
A:STEEM420.ST ()
MNGR_STEEM (1)-ST 2-80-9 DD RW CRC32 CFCCFF1D
D3D Reset 0:1280x800 b0 F22 i80000000 S1 VS0 59Hz ERROR 0
D3D Reset 0:1280x800 b0 F22 i80000000 S1 VS0 59Hz ERROR 0
D3D Reset 0:1536x1080 b1 F22 i80000000 S1 VS0 59Hz ERROR 0
D3D Reset 0:1536x1080 b1 F22 i80000000 S1 VS0 59Hz ERROR 0
POWER ON
D3D Reset 0:1536x1080 b1 F22 i80000000 S1 VS0 59Hz ERROR 0
D3D Reset 0:1536x1080 b1 F22 i80000000 S1 VS0 59Hz ERROR 0

20:31:17 Run
20:31:26 Stop
20:31:29 Leaving Steem
Save steem.ini
Save options.txt

Thanks. Best regards,

Javi

[STeven]

Hi Javi,
Thx for the report, can reproduce.
I will investigate but I noticed it runs OK with setting Use video buffer unchecked.

[Javi]

Thank you so much, works perfectly for me unchecking Use video buffer, that is a super helpful tip.