Good, at least now I know that I did not mess up the patch itself. It was quite complex patch after all. I was not sure about dosbox.conf, both approaches kinda make sense. One of my goals was to isolate "other" SVGA implementations from the core as much as possible (if you check you will find that …

A couple weeks ago I started discussion about multiple SVGA chipset choices in DOSBox. To prove that those were not just empty words on my side I started coding and actually got something working. Right now I have some deadlines looming in my daily job so I may not be able to spend any time on this …

Well, I've spent less than 3 hours this evening trying some of my ideas and checking my assumptions. Got simplistic module for et4k, functional enough to fool whatvga, that Eric game, and partially Deluxe Paint IIe. So, here's my plan: I will mess with it and if and when I get it to the condition …

Replying to Qbix's messages from two threads at the same time. You may think that I care only about "three buggy games." No, that's not it. I use those as an example, and not the very best example even IMO. Any pre-1992 game that claimed SVGA compatibility would support Trident, Tseng, or Paradise ( …

I knew I will get in trouble mentioning video in my first post. My original question was not SVGA-related. That's only that the most common hardware using this MMU feature (separated read and write mapping) was SVGA chipsets. You want something different? All right, some SCSI adapters, video …

I have a simple question about PAGING_LinkPage functionality: right now it looks like memory page can be mapped as read-only, write-only, or read-write but in the last case both read and write access will always go to the same physical page. Shouldn't this be more flexible -- two separate functions …

Thanks for the tip but it did not work in this case. There is something else fundamentally wrong with those three games in the way they handle VESA. If I get more time I may be able to trace it. As I pointed before, the issue is reproducible under VirtualPC. As for Win3.1 in 256 colors, I had that …

Me again, posting the final findings. I've got Eric running in 800x600x16 without code hacks -- there were three legitimate bugs in current CVS that prevented that before (1173098, 1173099, 1173197), although the last one is closer to feature request than to a bug report. The other mode (640x480x256 …

Well, did not get far. I am still not sure how those games are detecting SVGA hardware -- they must be using non-standard (and incorrect) way to do it. I've managed to spoof different revisions of Trident chipset by returning appropriate values in read_p3c5 (index 0xb) but still did not get far. The …

They probably fixed SVGA detection in later games. Eric, S301 (I mistakenly wrote 201 in the original post), and Gateway 2 were released about the same time, so no surprise if all three are broken in the same manner. I can run Eric in 800x600x16 with no problems now with that hack, but 640x480x256 …

Thanks for replies. I may try VDMS/SAPUCDEX later, although I can play the game in VirtualPC. My question was more about discrepancies in Games database -- the game is listed there as running (two times) when in fact it's not. Would be good to have new database, cleaner, more up to date. Oh well, …

After about an hour of messing with source I have found something particularly interesting about the game I used as an example -- Eric the Unready. Apparently, the way it attempts to identify hardware is not completely correct, so it misidentifies DOSBox as some Trident variation. As a result, it …

I am curious about the choice of S3 emulation for SVGA support in DOSBox. While it is well documented and decent chipset, I am not so sure if it is the best representative chipset to recreate typical PC running DOS environment. I still remember time when SVGA started to appear, and it was all …

According to the game database this game is supported. However, when I try to run setup it just says: "This application requires a CD-ROM. In case of difficulty refer to the manual." Tried it with real CD and CD image (mounted with Alcohol 120%), with DOSBox 0.63 and current CVS build, same result. …