Re: ITX-Llama (Vortex86EX ITX motherboard)

Posted on 2023-08-04, 14:26

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

For the CD audio issue, I have a dumb and "easy" solution I think. It would require to mod shsucdx (it's open source so it must not be too hard) and have it redirect the audio track requests to somewhere else, such as a serial port, and then on a serial port, connect a rpi pico with a DAC and SD …

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-08-04, 14:00

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

Update on this. WhileI was trying to test the audio injection via the chip on on the SM750 card I tried different HDMI monitors. Not all monitors can output the HDMI signal that I guess DOS creates. I event tried my Sony TV and the result is, I get the screen but relatively small right in the …

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-08-04, 13:47

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

ahmadexp wrote on 2023-08-04, 13:44: Amazing: I will work on it in parallel to see if I can get it work from my end. Great, thanks! 😀

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-08-04, 12:09

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

Page 71 of the CS4237B datasheet : Consumer IEC-958 Digital Output The CS4237B supports the industry standard IEC-958 consumer digital interface. Sometimes this standard is referred to S/PDIF which refers to an older version of this standard. This output provides an interface, external to the PC, …

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Re: ITX-Llama (Vortex86EX ITX motherboard)

Posted on 2023-08-04, 12:06

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

There is an amazing package of DOS games called REMOVED . Flynnsbit did a lot of work on it for the MiSTer project. I have been trying to make the necessary changes on his conversion tool to make it for the TL. However, the virtual CD is still an issue. I looked around and found some nice solutions …

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Re: HIDman - USB to PS/2 converter (Open Source)

Posted on 2023-08-04, 11:08

by

by Eivind

in Release Announcements

in Release Announcements

I have some basic hub support working in this branch https://github.com/hkr/HIDman/tree/hubs2. It has some limitations, if I remember correctly you cannot chain hubs and hot-plugging of devices that are connected to hubs does not work. It works with a KVM that I have here. The first KVM I tried did …

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Re: ITX-Llama (Vortex86EX ITX motherboard)

Posted on 2023-08-03, 13:19

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

Eivind, I got my hands on a Vortex86EX2 and it took similar to the Vortex86EX but with the additional core that uses the dual port RAM. I do not see anything significant in it in compare to its predecessor. Is that the reason why you mentioned that you do not thing about it as an upgrade? What …

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-08-03, 13:05

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

Just wondering about how you changed the font on the SM750. Not sure how to apply (INT 10h, AX=1110h, for those interested) I'm not changing the fonts on the SM750 per se, just changing where in memory the BIOS looks for text characters. Here 's a link that explains the BIOS routine, here 's the …

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Re: ITX-Llama (Vortex86EX ITX motherboard)

Posted on 2023-08-02, 20:02

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by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

Update: I got the PWM RGB LED (red for standby, green for power-on, yellow for HDD activity) working, as well as the HDD activity clicker. I need to experiment a bit further and tune the sound, but very promising so far. The HDD activity is controlled from hooking into disk routines in the BIOS, so …

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-08-02, 12:48

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

https://www.mouser.com/ProductDetail/Advantech/PCA-5650-00A1E?qs=dawwGz1r7uYs%2Fk1IUKynIw%3D%3D&_gl=1*ygxus9*_ga*dW5kZWZpbmVk*_ga_15W4STQT4T*dW5kZWZpbmVk*_ga_1KQLCYKRX3*dW5kZWZpbmVk Hi! I found a mini pcie graphics card. Would this be compatible? From what I can tell it uses the SM750 chip, so …

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-07-31, 23:25

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

About audio.... I have a feeling this could perhaps involve more work than it's worth? 😬 AFAIK HDMI only supports digital audio, I think the most compatible and least complex would be stereo uncompressed linear PCM @ 192kHz/24bit, which means you'd need an appropriate ADC and hook it up, probably …

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-07-31, 22:39

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

And I got the SM-750 with HDMI output to work. Yay! Now I want to inject the audio over the HDMI cable as well. Not sure if that is analog and digital. If digital, I need to figure out to do the conversion first. Cool that you got it working! I'm curious about resolutions and refresh rates though - …

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Re: ITX-Llama (Vortex86EX ITX motherboard)

Posted on 2023-07-31, 15:19

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by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

Just got 5 of these delivered... hopefully I'll get some time later to play around with them and see what's working... 🤞🤞🤞 Filename IMG_0722.jpeg File size 526.85 KiB Views 1153 views

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Re: ITX-Llama (Vortex86EX ITX motherboard)

Posted on 2023-07-31, 15:13

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

I have been thinking about a hardware based virtual CD that does the job of SHSUCDX. Would you guys think that would be a useful thing for the Tiny Llama project? It would be more useful than just for this project, especially if it's affordable 😃 It would indeed be very cool, but I don't think it's …

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-07-28, 17:18

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

After many hours of gradual refinements, I've completed a TinyLlama 2 (with wavetable selector) embedded version of a 3d printed mini IBM PS/2 25 that I had designed last year. This has got to be one of the most impressive things I've seen this year, mad props!! Proud to have been part of this! ❤️

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Re: ITX-Llama (Vortex86EX ITX motherboard)

Posted on 2023-07-21, 20:14

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by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

I haven't actually validated this, so we're working under the assumption that my interpretation of the datasheet is correct, and that the datasheet itself is accurate (for once). Firstly, since WSS and SB modes are mutually-exclusive, and SB mode doesn't allow any such thing (in the time of DSP …

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Re: ITX-Llama (Vortex86EX ITX motherboard)

Posted on 2023-07-21, 19:37

by

by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

You're right, the Vortex86EX only has a single DMA channel (DRQ1,DACK1) exposed on its stripped-down ISA bus. Thing is though, you only need a single DMA channel for the CS4237B. I suspect that will be fine for this design's intended use cases, but with only one DMA channel, you give up the …

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Re: TinyLlama (Vortex86EX SBC)

Posted on 2023-07-20, 18:59

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by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

shimart wrote on 2023-07-20, 18:34: Is it possible to replace 86duino with vex-som? Is pin map compatible? It's the same module, just has a different color on the heatspreader! 😀

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Re: ITX-Llama (Vortex86EX ITX motherboard)

Posted on 2023-07-20, 14:52

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by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

Update: Finally got the last components in stock @ JLC, and ordered the third prototype. This one was panelized with 4 FM synth boards to save on cost. Also made room for an optional 0.91" I2C-controlled OLED display to be attached directly to the board because why not. Could be used for debugging …

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Re: ITX-Llama (Vortex86EX ITX motherboard)

Posted on 2023-07-20, 09:57

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by Eivind

in Marvin \ System Specs

in Marvin \ System Specs

Somehow my head doesn't feel right :). You are using Vortex86EX SOM-128-EX and Crystal CS4237B... But SOM-128-EX doesn't support DRQ0, DRQ3, DACK0, DACK3. How did you manage to solve this? You're right, the Vortex86EX only has a single DMA channel (DRQ1,DACK1) exposed on its stripped-down ISA bus. …

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