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johndias

Lotharek SIO2SD on a 400 - locks up

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I bought the Lotharek Biggus Dickus SIO2SD.  Seems to work fine if I use the LCD screen to load software, but when I try to use the loader it comes up but I can't get the keyboard or joystick to respond and navigate the menu. Am I doing something wrong?

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How much memory do you have on the 400? I know a standard 16K 400 will not work with my SDrive-MAX so assume you would have issued with the SIO2SD as well if you haven't increased the memory. 

 

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Posted (edited)

Ah, it's stock RAM so that must be the problem. What are my options to upgrade the memory?

 

Sorry, it's been a while since I pulled this guy out.  It does have the 48k upgrade.

Edited by johndias
Mistakes were made

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Posted (edited)

I have the exact device from Lotharek and it hung on my 800 too when I first got it.  It worked much better when I downgraded to the 2.5 version of the device firmware.

It also works much more reliably if the SIO bus has a strong power source (I think my 800 alone was a little weak).  I am running mine with his SIO Splitter with a power supply I got on amazon and it is very stable.

 

https://www.amazon.com/gp/product/B0719GY29M

Edited by retrobits
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Posted (edited)

Hmm, maybe I'll attempt that downgrade.

 

Actually, I see he's got a "fixed" loader for 400/800 on the files section of the product page. Hmmmmmm.....

 

....annnnnnd that fixed it!

Edited by johndias
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Posted (edited)

Yeah, I forgot about that, but when I first got my SIO2SD, it didn't work on my 800 either.  I found the "fixed" version of the loader somewhere online.  I don't remember at the moment what the difference was - I think the loader called some OS routine directly instead of through the vector, and as luck would have it, the routine changed addresses between the 800 OS and the XL/XE OS (and it was written for the newer OS).  I let him know about it, so I am glad that he added the fixed version to his site to help other 400/800 users.

 

 

 

Edited by StickJock

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the keyboard issue... a number of times folks patched it up and a couple other bad ideas they found in it, glad he finally downloaded and chose to make something available for the customers...

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So, even with the fixed version on Lotharek's website I find that there are some functions that don't work ("?" for search, numbers to load disks) and if I browse into a directory with a lot of files (maybe more than 30?) the whole thing locks up. Any idea where you found your fixed version @StickJock?

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See my post April 22nd in this thread for further details on the origin of the patched loader. If we had source code it'd be easier to make a more...thorough patch, but we don't.

 

 

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16 hours ago, johndias said:

So, even with the fixed version on Lotharek's website I find that there are some functions that don't work ("?" for search, numbers to load disks) and if I browse into a directory with a lot of files (maybe more than 30?) the whole thing locks up. Any idea where you found your fixed version @StickJock?

No clue.  It was a while back.

I don't think that I tried the keyboard functions.  I just used the joystick to select the file, and the button to launch it.

 

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On 7/15/2020 at 8:37 PM, johndias said:

 

Actually, I see he's got a "fixed" loader for 400/800 on the files section of the product page. Hmmmmmm.....

 

....annnnnnd that fixed it!

I think the issue is that the SIO2SD tries to load a patch to the OS at boot, to enable high-speed SIO operation.  But the OS patch fails on the 400/800 ROM.

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