Re: SCSI2SD - Comparison of SCSI SD, CF, and HDD performance

Posted on 2019-03-01, 21:00

by

by krcroft

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Eeek, I can't quote reply anymore. Does everyone else see my above response as in my photo below? What did I do wrong? Yes, I'm seeing the quoting problem per your screenshot; although I'm not sure why the forum isn't rendering it properly! Just for fun, I tested my two A1 cards ... IMG_20190301_ …

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Re: SCSI2SD - Comparison of SCSI SD, CF, and HDD performance

Posted on 2019-03-01, 16:10

by

by krcroft

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What can we attribute the higher score to on the significantly slower system? With a 1% difference, my guess is they are statistically equivalent and they are within the random variability of performance. For example, if you reran the same test 3 times on the same system, how much does each test …

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Re: SCSI2SD - Comparison of SCSI SD, CF, and HDD performance

Posted on 2019-02-28, 06:51

by

by krcroft

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sorry, I should have double checked your original post - yes, the 200 to 4096 byte random IO tests are perfect. Interesting they don't have an A2 + UHS-II card; I wonder if there's some technical trade off where they give up some peak sequencial throughput for improved IOPS / latency. When you test …

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Re: SCSI2SD - Comparison of SCSI SD, CF, and HDD performance

Posted on 2019-02-28, 05:41

by

by krcroft

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here's a link to SanDisk's A2-rated Extreme Pro - https://www.amazon.com/dp/B07G3H5RBT/ Yes, you will find many more "Extreme Pros" that cost less, but they won't be A2 rated! I noticed that the card in that photo says SDXC. Does SCSI2SD support SDXC, or only SDHC? If SDXC works, then here's an …

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Re: SCSI2SD - Comparison of SCSI SD, CF, and HDD performance

Posted on 2019-02-25, 22:32

by

by krcroft

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Deunan, Indeed, the speed rating on SD cards (C10, U1, U3, V60, V90, etc..) only guarantees sequential large-block throughput with zero regard for random small-block IO performance. For the latter, you want the new 'Application Performance Class' rating, which appears as "A1" and "A2" on cards. The …

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Re: 486DX4-100 as a modern machine?

Posted on 2019-01-31, 15:12

by

by krcroft

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Regarding gentoo, also consider using a modern/fast system to cross-compile for your 486 target, which will let you deploy and test quickly, and then make any tweaks without waiting days for the rebuild. Another reason to cross-compile gentoo:, portage (atleast when I quit using gentoo) had become …

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Re: Codename: ICEMAN Floppy 4 broken!

Posted on 2019-01-28, 19:50

by

by krcroft

in Milliways

in Milliways

Thanks for the guidance Collector! Roffe, my resource.map is 5700 bytes.

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Re: Codename: ICEMAN Floppy 4 broken!

Posted on 2019-01-28, 15:59

by

by krcroft

in Milliways

in Milliways

Thanks krcroft for yor mail, but i cant answer as iam a new member, kind of annoying :) I dont know how to get a md5sums from that file as iam not able to read it. But my file size should be: resource.000 26 989kb resource.004 670 883kb Understood; I was thinking we could compare the md5sums for …

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Re: Have youtube slashed their bitrates?

Posted on 2019-01-25, 16:34

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by krcroft

in Milliways

in Milliways

If I remember correctly, then the "free" version of youtube. Then the sound is compressed to 128kbit . Perhaps I am wrong, but it seems to make sense, cause I have also experienced quite a few times, where the sound used to be good in the past. But now it is bad to "okay" in sound quality. Heck I …

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Re: Have youtube slashed their bitrates?

Posted on 2019-01-25, 16:23

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by krcroft

in Milliways

in Milliways

It's definitely not an issue with source content most of the time, or at least exclusively. I record gameplay and occasionally upload to youtube and my recording settings have not changed, and the quality of the framebuffer is surely not a variable, but the resulting YouTube video is significantly …

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Re: Have youtube slashed their bitrates?

Posted on 2019-01-25, 16:07

by

by krcroft

in Milliways

in Milliways

Do they take the H264 material and transcode it (to H264 again, for instance) before storing, then transcoding again at a later time from the already recoded H264 stream, compounding the compression error? I'm not sure if they keep the uploaded source video in its native form. It would be nice to …

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Re: Have youtube slashed their bitrates?

Posted on 2019-01-25, 04:06

by

by krcroft

in Milliways

in Milliways

Youtube routinely recompresses content with revised codecs, and they're surely dialing down bitrates in tandem with improvements in compression. Youtube will also try to negotiate the most bandwidth-efficient codec with your browser; currently this is VP9 video and Opus audio (assuming those streams …

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Re: What DOS games do you feel I'm missing?

Posted on 2019-01-24, 05:07

by

by krcroft

in DOS

in DOS

Here's a similar thread going back a couple years. It has a handful of references out to top 100+ lists, including two to mid 90s Computer Gaming World magazine (PDFs). (edit) here's the link: "Must Have" Best DOS games

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Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-01-20, 00:22

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by krcroft

in DOSBox Patches

in DOSBox Patches

Can somebody please check the tearing with the attached patch? Patched r4180 source, tested on Linux w/ fullscreen output=openglnb (same config as above). Zero tearing during gameplay, however at the starting menu, I could cause serve video lag and audio drop out when I rapidly moved my selection …

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Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-01-19, 23:05

by

by krcroft

in DOSBox Patches

in DOSBox Patches

Unfortuantely With openglpp i get tearing in fullscreen with fast games (Jazz Jackrabbit). Windowed is fine. With surfacepp there's no tearing in fullscreen nor windowed. Is the tearing present in vanilla DOSBox with openglnb ? In fullscreen yes Tested vanilla r4180 DOSBox on Linux, I see zero …

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Re: AUDIO Patch supporting FLAC, Opus, and MP3 audio tracks

Posted on 2019-01-19, 17:21

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by krcroft

in DOSBox Patches

in DOSBox Patches

Thanks for the heads up! Glad the patch is still applying cleanly. I've done some minor code clean-up but nothing worth posting yet (improved comments, defined all unchanging variables as const for better readability, added versioning inside the mp3 fast seektable data file, fixed all warnings when …

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Re: DOSBox Cheat System

Posted on 2019-01-08, 15:59

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by krcroft

in DOSBox Development

in DOSBox Development

This is a great addition - and a very nice and elegant implementation as well! As somone with limited gaming time, cheats can bring a new dimension to some games or open up new levels and such.. so I find them a fun addition to use every now and then. Do you have plans to add runtime features? (l'm …

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Re: AUDIO Patch supporting FLAC, Opus, and MP3 audio tracks

Posted on 2019-01-07, 17:23

by

by krcroft

in DOSBox Patches

in DOSBox Patches

Well said Dominus, and I fully agree - if these flatpak builds will be distributed generally beyond Bam's use and supported by the DOSBox team, then I fully recommend strictly using the released 0.74.2 source linked against release-only versions of sdl sound (1.03) libogg and libvorbis to ensure …

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Re: AUDIO Patch supporting FLAC, Opus, and MP3 audio tracks

Posted on 2019-01-07, 15:00

by

by krcroft

in DOSBox Patches

in DOSBox Patches

Option 1 just works ;) Well, doesn't the others work also? SDL_sound looks more like abandonware.. . sdl1_sound was abandoned in 2008. Getting ogg Vorbis support working in a custom bsrebones self contained environment (which flatpak's runtime environment virtualizes for every app), takes some …

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Re: I spent Christmas in Finland and Estonia (Many Pictures!)

Posted on 2018-12-30, 16:42

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by krcroft

in Milliways

in Milliways

Looks wonderful! I personally love the cold and snow. Thanks for sharing.

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