Re: CGA Composite Mode under DOSBOX?

Posted on 2012-04-29, 07:44

by

by ripsaw8080

in DOSBox Patches

in DOSBox Patches

The colors generally look good; but the colored edges, such as on the castle bricks or door handles, take some getting used to. I tend to prefer the look of edges in DOSBox's current composite rendering in KQ1, but that's strictly subjective and not referring to emulation accuracy.

---

Re: King's Quest PCjr. SVN Regression

Posted on 2012-04-29, 01:05

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

The issue seems to be related to revision 3735, specifically the vga_memory.cpp change. Reverting the change causes the text to display normally in the PCjr/Tandy KQ1 booter with machine=pcjr, but also brings back the glitched lines in the ScubaVenture cart. 😒

---

Re: CGA Composite Mode under DOSBOX?

Posted on 2012-04-28, 19:34

by

by ripsaw8080

in DOSBox Patches

in DOSBox Patches

Consider this screenshot of the Bruce Lee game hacked to use mode 4 instead of mode 6 for its composite video option: http://www.vogons.org/files/brucelee_001.png The game is writing the same video data as it would write for mode 6, and you can see the background looks quite similar to the game's …

---

Re: A4tech's Image256 can't run

Posted on 2012-04-28, 17:49

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

The app has a bug that occurs when DOS reports more than 11 valid drive letters via INT 21/0E. DOSBox reports 26 drives because of the Z: drive, but the bug would also occur in real DOS if LASTDRIVE= in CONFIG.SYS is higher than K. Put the attached workaround program in the app folder and run it to …

---

Re: CGA Composite Mode under DOSBOX?

Posted on 2012-04-28, 15:04

by

by ripsaw8080

in DOSBox Patches

in DOSBox Patches

Could there be a detection method introduced in dosbox that would switch to composite if it detects vertical lines pattern? Probably too much fuzzy logic for DOSBox, but it'd be interesting to see a heuristic attempted for that. BTW why bruce lee allows composite in both modes? I even think the …

---

Re: CGA Composite Mode under DOSBOX?

Posted on 2012-04-28, 03:43

by

by ripsaw8080

in DOSBox Patches

in DOSBox Patches

That's kind of a dirty trick the Bruce Lee game is playing to make BIOS draw mode 4 text in mode 6 by changing 0x449 to 4 while its writing the status line. Stuff like that could cause any number of problems for DOSBox's emulated video BIOS... The text is lower with real BIOSes because they use …

---

Re: More then 1 disc game?.

Posted on 2012-04-26, 15:31

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

It should be obvious for a real optical drive that you physically change the disc, so I assume you're mounting images. imgmount d disc1.iso disc2.iso ... diskN.iso -t iso Press Ctrl-F4 to switch discs. You may have .CUE files instead of .ISO files. This information is in the readme/manual, BTW.

---

Re: Doom 2 Saving sometime freeze the game (minor annoying problem)

Posted on 2012-04-26, 15:25

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Which version of Doom 2? I believe v1.9 is the last. When these hangs (freezes) occur, does a message appear in the Status Window?

---

Re: Fifa International Soccer (1994) via DOSBox, crashes while launching

Posted on 2012-04-25, 23:26

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

The game needs cputype=386_prefetch in the DOSBox settings. FYI, there is a game compatibility list where you could have found this solution: http://www.dosbox.com/comp_list.php?showID=97

---

Re: Deja Vu Problems

Posted on 2012-04-25, 23:16

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Should work with machine=cga, and it won't cause you to lose anything because the game is designed for CGA graphics. DOSBox simulates a standard keyboard for CGA, Tandy, and Hercules machine types by using non-enhanced keyboard BIOS calls in its input loop, which is what the game expects. It's …

---

Re: CGA Composite Mode under DOSBOX?

Posted on 2012-04-25, 18:44

by

by ripsaw8080

in DOSBox Patches

in DOSBox Patches

It's not excessive clamping - that's just the way the old CGA's composite generation works when the color burst is disabled: colours 1-6 become identical to 7 and colours 9-14 become identical to 15, so that text would not be legible with real hardware on a composite monitor either. I'm having …

---

Re: CGA Composite Mode under DOSBOX?

Posted on 2012-04-25, 17:15

by

by ripsaw8080

in DOSBox Patches

in DOSBox Patches

Vile Rancour wrote: could you provide a build with screenshots enabled? Here you go. I've hooked up the new/old setting to an Alt-F10 keybind for testing.

---

Re: Blood Music Issues

Posted on 2012-04-25, 16:47

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

WulvenWanderer wrote: I assume MIXER CDAUDIO 100:100 sets it back to normal? The default volume settings are 100% on both channels, so your assumption is correct. Information regarding the MIXER command is in the readme/manual.

---

Re: Druid: Dæmons of the Mind

Posted on 2012-04-25, 15:40

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

According to wd, this is a known issue caused by the use of segment limits, a CPU/paging mechanism the DOSBox devs have decided not to emulate for performance reasons. This case is a relatively minor glitch compared to a few others caused by segment limits.

---

Re: CGA Composite Mode under DOSBOX?

Posted on 2012-04-25, 10:35

by

by ripsaw8080

in DOSBox Patches

in DOSBox Patches

Looking at the mode 4 palette, some of the colors have little difference in the two brightest levels. Perhaps there is excessive clamping at the upper end? The gradient of the mode 6 palette seems fine, though. There are some odd transitions that extend into or past solid areas, creating seemingly …

---

Re: Blood Music Issues

Posted on 2012-04-25, 02:41

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

I assume you're using a BIN/CUE image of the game disc mounted with the IMGMOUNT command, because otherwise you should use the CD audio volume control provided by your host OS or soundcard drivers. You can use the MIXER command in DOSBox to change the volume of CD audio, and for that you don't need …

---

Re: CGA Composite Mode under DOSBOX?

Posted on 2012-04-22, 12:01

by

by ripsaw8080

in DOSBox Patches

in DOSBox Patches

I was referring to robertmo's question, pointing out that just because something looks like it might be applicable to filtering doesn't mean it is. Can comb filtering be done as post-processing, such as with a shader in SVN builds, or is too much information lost if it's not done earlier in the …

---

Re: CGA Composite Mode under DOSBOX?

Posted on 2012-04-22, 11:25

by

by ripsaw8080

in DOSBox Patches

in DOSBox Patches

When posting the test patch I mentioned that disabled color burst in mode 5 is not handled (red in the palette is characteristic of mode 5). If b&w composite is not going to be emulated with a luma-only palette, the other option is to fall back to RGB when color burst is not active -- although it …

---

Re: Tekwar CD Audio

Posted on 2012-04-22, 03:11

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Where are you trying to start the CD music? It must be while you're in the FPS portion of the game, it doesn't work elsewhere. If you press Alt-P in the FPS part of the game, does the soundcard/MIDI music stop and an onscreen message about the CD playing appear? Whether you actually hear the CD …

---

Re: Tekwar CD Audio

Posted on 2012-04-22, 02:56

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

In the game's MANUAL.TXT file there is a section about CD audio control keys that I think you will find illuminating.

---