SVI-CAS Image Player Initial Announcement

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By Romsey

Supporter (6)

Romsey의 아바타

01-07-2020, 08:28

For those who may be interested, I am in the process of releasing my own image player that specifically targets the Spectravideo family of 8-bit computers, MSX, TRS-80 CoCo, and Sinclair machines (Spectrum, 81,80).

The player has a number of capabilities / features not found in other existing players and I believe may be of interest to some users of retro machines who are looking to purchase something a little different when compared to existing players.

Some photos to illustrate the unit's operation:

Power-up & main menu options:

http://users.tpg.com.au/romsey/SVI/SVI-1.JPG
http://users.tpg.com.au/romsey/SVI/SVI-2.JPG

Search directories with the mini file system:

http://users.tpg.com.au/romsey/SVI/SVI-3.JPG
http://users.tpg.com.au/romsey/SVI/SVI-4.JPG

Examine an image to see what programs may be inside & select program to play back:

http://users.tpg.com.au/romsey/SVI/SVI-5.JPG

Loading - Play process:
http://users.tpg.com.au/romsey/SVI/SVI-6.JPG

Completion:

http://users.tpg.com.au/romsey/SVI/SVI-7.JPG

Roughly size of a remote control:

http://users.tpg.com.au/romsey/SVI/SVI-8.JPG

Loading MSX program:

http://users.tpg.com.au/romsey/SVI/SVI-9.JPG

Loading TRS-80 program:

http://users.tpg.com.au/romsey/SVI/SVI-10.JPG

Also works with Sinclair computers (and available in black if desired):

http://users.tpg.com.au/romsey/SVI/SVI-11.JPG

Connects easily to the SVI-318 / 328 computers using the SVI adapter cable:

http://users.tpg.com.au/romsey/SVI/SVI-12.JPG
http://users.tpg.com.au/romsey/SVI/SVI-13.JPG
http://users.tpg.com.au/romsey/SVI/SVI-14.JPG

Any questions let me know.

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By RvS

Rookie (23)

RvS의 아바타

01-07-2020, 11:15

Looks nice! Is it arduino based?

By hamlet

Scribe (3125)

hamlet의 아바타

01-07-2020, 12:01

Very clean design. Congrats. I like it!

By Alexey

Guardian (2793)

Alexey의 아바타

01-07-2020, 21:32

Nicely done!

By Romsey

Supporter (6)

Romsey의 아바타

02-07-2020, 02:40

@RvS

Hi,

No, it is not based on arduino software wise, but I do make use of the Mega2560 Pro arduino board and the standard 2.8" arduino TFT touch screen module as they are cheaper than getting a custom board surface mount loaded. The following link will allow downloading of the 50 page PDF users manual for SVI-CAS and it should answer all your questions as well as give a good overview of all the units features:

http://users.tpg.com.au/romsey/SVI/SVI-CAS.pdf

By CASDuino

Master (150)

CASDuino의 아바타

02-07-2020, 04:51

@Romsey

Will you be adding Dragon 32/64 support as their CAS files are very similar to CoCo CAS.

Also Jupiter ACE TAP files are very similar to Spectrum TAP files (t-states when converted to ms are virtually the same as the t-states for the Spectrum give or take a few milliseconds.) so will you be adding them?

Looks a great product.

By Romsey

Supporter (6)

Romsey의 아바타

02-07-2020, 06:43

@CASDuino

Hi,

I don't own or have have access to a Dragon computer - they are very rare here in Australia, but I believe that as it stands such images should work. SVI-CAS has been tested with every TRS-80 CoCo image I could find (nearly 700), which includes ones which were heavily optimized to the point where trailing packet bytes were missing in some files and it handled them fine. Even CoCO CAS images where the header starts out normal and then runs on for longer than a standard header and is then followed by non-standard image data - it is here that SVI-CAS will switch to "Raw Mode" to reproduce what it sees, as this caters for images where tape protection schemes have been persevered in the image.

I've been told that the Dragon computer uses exactly the same tape "packet" structure for data blocks and the same header composition, so it should be fine, I have used SVI-CAS to look at the contents of Dragon images and it has read and listed out whatever programs were contained within them without issue. Of course it does all boil down to it being used on a real machine and I am waiting on the word from a fellow in Denmark who has bought a unit from me to report back when he receives his unit.

Also I don't support the AMSTRAD machines - again because I can't get access to one, if you try to play a CDT image it will actually play - but the frequency will be wrong because I have left out 4MHz Z80 support for now. It is not hard for me to add in new machines..... in fact it is easy to add in the Amstrad, BBC micro, Electron, etc, it's just a matter of my being able to test that the image interrogation prior to actual playback is all good. I wanted the ability to look inside an image and display what files it held as many of the SVI-318/328 images are large compilations of multiple programs.... in fact it was these very machines that prompted me to create this unit, as I was sick of converting files to WAVs and trying to play them manually into my machines.

By MSX4ever

Master (202)

MSX4ever의 아바타

02-07-2020, 07:57

Hello,
It is a very nice project
Any idea what it will cost approximately

By CASDuino

Master (150)

CASDuino의 아바타

02-07-2020, 09:51

@Romsey

When testing on computers I didn't have access too I'd record the playback on PC and load it in an emulator. It's not a perfect way of doing things but it does give you an idea if things work. As for the Amstrad CDT files, as long as you have the TZX IDs programmed in it doesn't matter about the 4Mhz clock speed. TZXDuino doesn't differentiate between the differences in t-states, it operates with the Spectrum in mind, and it loads CDTs perfectly, even the Musical Loaders.

By liveinabin

Rookie (19)

liveinabin의 아바타

02-07-2020, 15:14

That looks great. I use a TZXduino (for MSX and Spectrum) and the tiny display is a pain to navigate with. This is much better (and it looks great in ZX Spectrum black - which also matches my Sony HitBit)

By CASDuino

Master (150)

CASDuino의 아바타

02-07-2020, 20:08

liveinabin wrote:

That looks great. I use a TZXduino (for MSX and Spectrum) and the tiny display is a pain to navigate with. This is much better (and it looks great in ZX Spectrum black - which also matches my Sony HitBit)

One of the OLED displays or a 1602 LCD?

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