LASER310

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Frederir
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LASER310

Post by Frederir »

https://github.com/zzemu-cn/LASER310_FPGA

In altera FPGA

A rather obscure 8 bits computer from Taiwan but sold in Australia.

http://www.vz200.org/bushy/
Gehstock
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Re: LASER310

Post by Gehstock »

Should fit on Mist
IMG_20190203_233919.jpg
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Frederir
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Re: LASER310

Post by Frederir »

Nice!

Even if it was sold in Europe, mainly UK I think, it has a noticeable success in Australia. Our friends from down under should appreciate it. Not sure if there is still an active community tough.
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DrOG
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Re: LASER310

Post by DrOG »

Gehstock wrote:Should fit on Mist
IMG_20190203_233919.jpg
I especially like these near unknown and rare computers! Bravo! :cheers:
nippur72
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Re: LASER310

Post by nippur72 »

Hi, as I wrote in issues #16 I tried this core on my old CRT TV and it doesn't display correctly. The image is slanted, out of sync and monochrome.

Looking at the code it seems this is a VGA-only core, but I noticed that the file "SVGA_DEFINES.v" contains configurable parameters for the screen geometry. Perhaps we can find a set of values for 15625 khz line rate?
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DrOG
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Re: LASER310

Post by DrOG »

Is there a public beta release of this core on MiST platform? If yes, I volunteer to test...
nippur72
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Re: LASER310

Post by nippur72 »

@DrOg you can try the .rbf file from @Gehstock's repo on GitHub:

https://github.com/Gehstock/Mist_FPGA/b ... 0_MiST.rbf

I used this computer back in the '80s, here in Italy they were not sold in stores but distributed with a computer course. In other countries they were branded under different names, most notably Dick Smith VZ200/300 in Australia. There is a quite large software collection (mainly games).

The successor of Laser 310 is Laser 500 which is even more obscure and rare. I am writing an implementation of it for the MiST (still in alpha).
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DrOG
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Re: LASER310

Post by DrOG »

Hi!

Tried the current core from the above linked repository, keyboard and BASIC are OK, component video out results a nice, well-centered picture! VGA is 640x480@60Hz, which should be compatible with my picky LCD TV as well, but is isn't. Scanlines option has no effect, and no option for loading files.
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nippur72
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Re: LASER310

Post by nippur72 »

by looking at the source code it seems to me that the CPU clock is 50 / 16 = 3.125 MHz which is a bit different than the 3.57 MHz of the real hardware. Has anyone verified that?
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rondc
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Re: LASER310

Post by rondc »

nippur72 wrote:by looking at the source code it seems to me that the CPU clock is 50 / 16 = 3.125 MHz which is a bit different than the 3.57 MHz of the real hardware. Has anyone verified that?
All the references I have for Laser 310 and it's Z80 speed , being at 3.54 MHz which differs with yours 3.57
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Re: LASER310

Post by nippur72 »

I see that @Gehstock has removed his MiST port of this computer, commenting it with:
There is a better Version
Does anybody know where is such version? The only one I know is zzemu-cn/LASER310_FPGA but it's not for the MiST.
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