4 replies to this topic

[mio2repair]

Hello,
Here is a new topic for miscellaneous repair configuration or modification suggesions and questions.
The other people do not want their thread filled full of stuff so here is some room.

So to start out with is the rom different for the 256 k and 1 meg versions?

If it is different what are the differences?

Could one byte be changed or a small portion of code?

Where is this byte or code address within the rom?

Does anyone have the schematic diagram or source code available for aiding in repair or modification?

Possible for allowing use of more reliable smaller lighter and more energy saving modern SCSI drives.

Who cares if half of the 512 k sectors are not used as the drives available are way bigger and very plentifull
and the circuitry would be more simple and reliable.

If power is left on on the mio and computer turned off and restarted does the ram still contain
valid ram disk data and is it accessable right away?

You may post a link to any usefull information you may suggest to be helpfull.

I know there are manuals and disk images out there already and maybe even more.

Sorry but I am not limited to Atari but am interested in several old 8 bit machines but I see that as a plus
as it allows ideas from different machines to be used on each other etc.

Thank You
That should get something started

[Guitarman]

Quote

If power is left on on the mio and computer turned off and restarted does the ram still contain
valid ram disk data and is it accessable right away?

This is one of the cooler thing about the MIO. You can allocate part of the memory as a ramdisk, format it with SpartaDos and make it bootable. You then designate it as drive 1 in the firmware. When you shut off the computer, the MIO stays powered on (it has its own power supply). When you turn the computer back on, it boots instantly to the ramdisk. This is how I used to use mine until it stopped working.

I also have the schematic in PDF form. It is posted in another topic but will attach it here when I get home.

Edited by Guitarman, Thu Jun 29, 2006 3:49 PM.

[mio2repair]

Guitarman, on Thu Jun 29, 2006 4:46 PM, said:

Quote

If power is left on on the mio and computer turned off and restarted does the ram still contain
valid ram disk data and is it accessable right away?

This is one of the cooler thing about the MIO. You can allocate part of the memory as a ramdisk, format it with SpartaDos and make it bootable. You then designate it as drive 1 in the firmware. When you shut off the computer, the MIO stays powered on (it has its own power supply). When you turn the computer back on, it boots instantly to the ramdisk. This is how I used to use mine until it stopped working.

I also have the schematic in PDF form. It is posted in another topic but will attach it here when I get home.

Hello,
I looked and you mentioned it but I could not find the file attached.

[Guitarman]

Here are both the schematic and the user manual for the MIO. I still have to make an image of the MIO disk that came with it but will attach it here when I do.

Schematic
User Guide

Enjoy!!

Edited by Guitarman, Fri Jun 30, 2006 10:21 AM.

[mio2repair]

Hello,
I found a rom binary mio11os.bin out there somewhere.
Version 1.1 for the 1 meg MIO.

Still looking for the 256 k version.

It would be nice to test old 256k board with out having to upgrade to 1 meg before getting it to work otherwise.

I will have to make a SIO2PC cable to make a utility disk I guess
since I can not read the disk that came with my other MIO.
I guess it is supposed to be regular 1050 format.
My drive reads other disks well.