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Re: DOSBox-X branch

the LSB masking only affects reading the counter. Yes, but the question is if it should apply when the counter is written. I realize it would halve the number of possible frequencies that can be selected, but the difference is perhaps small enough to be indistinguishable. It seems more like what …

Re: DOSBox-X branch

The odd number counter for square wave is currently handled for reading the counter (&oxfffe), which was needed for Corncob 3D. So I wonder if it would be correct to do the same when the counter is written rather than treating 1 as a special case. What did Corncob 3D do differently prior to masking …

Re: DOSBox-X branch

Here's another patch you guys might be interested in looking at from DOSBox-X. This affects PC speaker emulation and sound effects in PC booter game "Paratrooper". Apparently the helicopter noises are made by alternating between count == 1 and count == 2. The game sets mode 3 and does not change the …

Re: DOSBox-X branch

I just finished a fix for DOSBox-X to eliminate the popping noises with Prince of Persia's Tandy DAC sound effects. It would be nice if PoP let the waveform end at DC zero at the end, but that's not the case. The fix works by emulating apparent Tandy 1000 behavior where disabling the DAC after …

Re: DOSBox-X branch

This is the 8-bit I/O for volume. Note it makes it impossible to use it for even numbered registers: 1497:00008C39 2AE4 sub ah,ah 1497:00008C3B B103 mov cl,03 1497:00008C3D D2C8 ror al,cl 1497:00008C3F 2460 and al,60 1497:00008C41 0C90 or al,90 1497:00008C43 F6D4 not ah 1497:00008C45 80E40F and ah, …

Re: DOSBox-X branch

I have a question about I/O port C0h (the SN76496) on Tandy systems, based on an interesting bug fix related to Prince of Persia in DOSBox-X recently with machine=tandy. I/O port C0h (the SN76496) is 8 bits wide, correct? Prince of Persia appears to have code that writes the volume registers with 8- …

Re: DOSBox-X branch

Running loadfix defender.com shows "Sorry, the DOS memory required by the game is not free. 64kb freed," Then I tried loadfix -10 defender.com, it runs but proceeds with the black screen. What about loadfix -15, loadfix -20, loadfix -25, etc...? Tried loadfix -5 to -45, all proceed to a blacksreen …

Re: DOSBox-X branch

@TheGreatCodeholio: Wow! Disabling the accurate mode fixed the muffled/distorted sound. Tandy still doesn't work though :( Still just the black screen... But thank you on the tip, at least the EGA/CGA now works good, just gotta figure out how to make Tandy work :) @_Rob: If you don't mind me asking …

Re: DOSBox-X branch

Thanks for the help, unfortunately, here are the results: 1. If I try to play using Tandy, it boots and just hangs on a blackscreen 2. When I use the EGA version, it runs but with the muffled/distorted dos-ish music/sound I am attaching my conf settings for your reference... note that I'm using the …

Re: DOSBox-X branch

I have the latest development build, but for this test I purposely used the last released version of DOSBox-X (0.83.0). And I only set machine=tandy. My config is simply [dosbox] machine=tandy [autoexec] boot Defender_of_the_Crown.img What happens if you use core=normal and a fixed cycle count? …

Re: DOSBox-X branch

Looking at mobygames, there seem to be 3 PC versions. - Original CGA only version for DOS - re-released CGA/EGA version for DOS (not sure if this supports Tandy) - PC Booter version with CGA/EGA and Tandy. I have the PC Booter version, and when I start it in DOSBox-X with the default machine type, …

Re: DOSBox-X branch

Hi, I just registered and am not sure if this is the right thread to post this question... Has anyone tried playing Defender of the Crown? All of the versions I tried have garbled sound/music when playing but works fine when I used normal dosbox. I even followed the conf file of the regular dosbox …

Re: DOSBox-X branch

Found a bug in INT 10h AX=101Ah that was fixed for a game. The function in DOSBox behind it reads the Attribute Controller in a way that leaves the screen blank. You'd never notice in DOSBox SVN because SVN does not correctly emulate the display blanking caused by attribute controller programming ( …

Re: DOSBox-X branch

Great! No hurries, I can wait for the next official release. Clearly if you can compile the source code from the release section, you can also git clone from the project page as well. The latest commit to master has the latest fixes and improvements. git clone https://github.com/joncampbell123/ …

Re: DOSBox-X branch

Hi, window title says "dosbox-x 0.82.22" so I'm pretty sure it's the latest version. Anyway I've downloaded again https://github.com/joncampbell123/dosbox-x/archive/dosbox-x-v0.82.22.tar.gz and I've compiled it from a clean directory and problem remains. I just realized that the byte dosbox-x …

Re: DOSBox-X branch

Hi, I think I come across some bug in the dosbox-x debugger. I want to write CF opcode (IRET instruction) in some memory address, so I put in the debugger window: SM xxxx:yyyy CF However, the byte in memory address xxxx:yyyy changes to 00 instead of CF No problem with other opcodes so far. I'm …

Re: DOSBox-X branch

Hi there new here with a quick question .. i usually use dosbox on my crt monitor and it switches resolutions correctly ie 70hz dos mode was playing with dosbox-x but i cant seem to get it to play ball with my crt all i can get is 60hz scaled and it looks terrible on a crt i have tried every …

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