Emulator - get latest release here.

The Uzebox now have a fully functional emulator! Download and discuss it here.
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nicksen782
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Re: Emulator - get latest release here.

Post by nicksen782 » Wed Jan 29, 2014 10:32 pm

I've been looking for how to utilize the SD card. I want to store map and music data on the SD. I see that 1.19 Uzem is in beta and supports a new SD card emulation. What is the latest version now?

What APIs are available to access the SD card (emulated or real? Same right?) Or is it done with raw SD commands? Also, if I remember correctly, you must read an entire sector (512 bytes) on an SD card as you can't just grab a byte or two. How is that handled? Will it cost 512 bytes of ram?

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Re: Emulator - get latest release here.

Post by uze6666 » Thu Jan 30, 2014 4:06 am

nicksen782 wrote:I've been looking for how to utilize the SD card. I want to store map and music data on the SD. I see that 1.19 Uzem is in beta and supports a new SD card emulation. What is the latest version now?

What APIs are available to access the SD card (emulated or real? Same right?) Or is it done with raw SD commands? Also, if I remember correctly, you must read an entire sector (512 bytes) on an SD card as you can't just grab a byte or two. How is that handled? Will it cost 512 bytes of ram?
I packaged the release version of uzem 1.19 it is available for download in the 1st post of this topic. You will notice it's is not hosted on google code, since they changed their terms of service and we can't upload anymore since January 15th. I guess we will have to move the project somewhere else like github. I'll check that in the next few months.

V1.19 is the latest and has sufficient SD emulation to support Petitfatfs (and perhaps FatFs though I didn't have time to test it yet). Petifatfs is a tiny version of FatFS, a well known open source FAT/SD library for embedded applications. It is integrated in the Uzebox codebase and is the easiest way interact with the SD card to read files. Read the online docs, they are pretty complete. With it you can read a byte at a time or a whole sector. But beware, althought your program is reading one byte at a time, behind the scene PetitFatFS still needs to read the whole sector each time. In other words: it is really slow!! If you can allocate a bigger buffer, use one. Check the Uze8 demo project for usage. There's also the Uze mario game that used the library.

You should be able to load maps without problems (I strongly recommend using a single resource file, instead of many little ones). Loading music is another story, I and Lee where discussing that at some point and it is not trivial.

If you can write documentation on the SD stuff as you go (both how to use in uzem and how to use in in games) that would be awesome for a lot of folks here. :mrgreen:

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Re: Emulator - get latest release here.

Post by nicksen782 » Thu Jan 30, 2014 5:10 am

Documentation, for sure. I looked for some documentation on the forums and wiki and was unable to find any. I'm just about ready to finish up the documentation for the sprite/movement tutorial. I just need to make sure that what I have is solid and ready.

I'm just guessing here but loading music is a sort of real-time thing unless you buffer it in RAM before hand. As for map screens I could load it during the transitions between screens where I want a scrolling effect anyway. I could potentially hide the 'slowness'.

* The source download for your Mario game is broken. Actually, it was the first place I looked as I pulled much good info from your older Mario demo that is included in the r212 trunk.

BTW, what happened with Google code?

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Re: Emulator - get latest release here.

Post by uze6666 » Wed Mar 05, 2014 5:44 am

Version 1.19.1 was commited to SVN. Win32 version was added to the main post.

V1.19.1:
----------
-Bug fix: Initial seek was ignored
-Bug fix: Can't read past 64k. FAT was not filled with cluster chain.
-Changed cluster size to a more standard 32k

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Re: Emulator - get latest release here.

Post by uze6666 » Sat Mar 14, 2015 5:23 am

Here's Uzem 1.20 Beta for Windows. I added support for the new Uzebox Keyboard interface. I tried to keep changes to a minimum to make it easier when merging the SPI ram stuff and esp8266 later.

Uzem automatically detects when the game uses the keyboard protocol and captures the PC keyboard input for it. P2 port is always used for the Uzebox keyboard. Naturally that means you can't also use the keyboard as a joystick at the same time. But you can use a regular pc jopystick/joypad for P1.

I'll beta test a bit more and if you guys find bugs or have comments or suggestions, let me know.
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Re: Emulator - get latest release here.

Post by uze6666 » Fri Jun 05, 2015 2:28 am

I've pushed v1.20 with the preliminary keyboard support to the repo. For those also working on uzem, you'll have to rebase. I've updated the main post too.

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Re: Emulator - get latest release here.

Post by uze6666 » Wed Jul 22, 2015 4:36 am

Uzem V1.3 with improved framerate and bug fixes has been released. See main post for the download.

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Re: Emulator - get latest release here.

Post by uze6666 » Tue Jul 28, 2015 9:37 pm

It never occurred to me before, but if you are enclined to compile your own uzem (if you have GCC with x86 target), you can recompile it optimized for your own CPU architecture. At the beginning of the makefile just add:

Code: Select all

ARCH=native
TUNE=y
I got a modest performance boost accounting for my core2. The default binary is compiled for pentium pro I think.

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Re: Emulator - get latest release here.

Post by uze6666 » Sun Aug 02, 2015 2:57 am

Uzem 1.3.1 was published to teh main post. Two main new features:
-Added feature to capture/playback controller buttons
-Implemented the watchdog timer to support the true random generator

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Re: Emulator - get latest release here.

Post by uze6666 » Sun Aug 02, 2015 6:07 am

Uzem 1.3.2 published. Fix to the controller capture code that was screwing up the MSbyte of the controller data.

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