IO Error on CoCo

[yell0w_lantern]

I just got a CoCo 3 and I cannot get the HxC to load anything.

I previously had some trouble getting it going ona CoCo 2 until I figured out I was using tghe cassette load command instead of disk and I found taht I had to reset the computer before accessing the HxC. This second issue is strange to me in that if I try to access HxC files without reseting the CoCo2 I get "IO error" - I don't understand why a reset takes care of this.

On my CoCo3 I get the IO error message as well except that it does not resolve with a reset.

I'm using a standard CoCo disk controller but the previous owner did install ADOS on it. Could ADOS be the problem, am I doing something wrong or do I have a bad HxC. I am especially concerned about the last possibility because I cannot load any TI games through the PEB either although I can access the disk from inside a game like Tunnels of Doom.

[Jeff]

I just got a CoCo 3 and I cannot get the HxC to load anything.

I previously had some trouble getting it going ona CoCo 2 until I figured out I was using tghe cassette load command instead of disk and I found taht I had to reset the computer before accessing the HxC. This second issue is strange to me in that if I try to access HxC files without reseting the CoCo2 I get "IO error" - I don't understand why a reset takes care of this.

On my CoCo3 I get the IO error message as well except that it does not resolve with a reset.

I'm using a standard CoCo disk controller but the previous owner did install ADOS on it. Could ADOS be the problem, am I doing something wrong or do I have a bad HxC. I am especially concerned about the last possibility because I cannot load any TI games through the PEB either although I can access the disk from inside a game like Tunnels of Doom.

Which Floppy Emulator ?
Firmware version ?
Jumper setting ?
Interface mode setting ?
Floppy cable used ?

[yell0w_lantern]

Which Floppy Emulator ? Lotharek Rev C cased
Firmware version ? 1.7.2.7
Jumper setting ? Straight on from the back it looks like this
I . . .
I I . .
. I . .
Interface mode setting ? Not sure what you mean here
Floppy cable used ? Card edge to 34 pin no twist

[Jeff]

Which Floppy Emulator ? Lotharek Rev C cased
Firmware version ? 1.7.2.7
Jumper setting ? Straight on from the back it looks like this I . . .
I I . .
. I . .
Interface mode setting ? Not sure what you mean here
Floppy cable used ? Card edge to 34 pin no twist

mhh according to the user manual the jumpers should at the other side, isn't it ?

[yell0w_lantern]

Which Floppy Emulator ? Lotharek Rev C cased
Firmware version ? 1.7.2.7
Jumper setting ? Straight on from the back it looks like this I . . .
I I . .
. I . .
Interface mode setting ? Not sure what you mean here
Floppy cable used ? Card edge to 34 pin no twist

mhh according to the user manual the jumpers should at the other side, isn't it ?

My point of reference is from the back of the device. From the front (can't see it from the front but if you could:
. . . I
. . I I
. . I .

A couple of the pins for the 34 pin connector are not flush with the others and have recessed somewhat. When I was trying to get the TI-99 and the CoCo2 to work before, I pulled them flush again using needle nose pliers but it did not seem to make a difference for either machine before.

[Jeff]

My point of reference is from the back of the device. From the front (can't see it from the front but if you could:
. . . I
. . I I
. . I .

Still a problem : For me this should be this :
. . I .
. . I I
. . . I

[yell0w_lantern]

My point of reference is from the back of the device. From the front (can't see it from the front but if you could:
. . . I
. . I I
. . I .

Still a problem : For me this should be this :
. . I .
. . I I
. . . I

Changed jumper settings and no difference.

[Jeff]

Overwrite your cfg file.

And the update your firmware with the one present in your email box.

[Dantyr]

Hello,

I'm having the same IO ERROR here. Just renamed the original DSK Coco files, found everywhere on the net, to JVC and exported to the SD. When make a DIR, it just reads to track 17 and keep repeating. Never passes track 17.

My SD emulator have firmware 0.2.2.0.

Thanks!
Daniel

[Jeff]

Hello,

I'm having the same IO ERROR here. Just renamed the original DSK Coco files, found everywhere on the net, to JVC and exported to the SD. When make a DIR, it just reads to track 17 and keep repeating. Never passes track 17.

My SD emulator have firmware 0.2.2.0.

Thanks!
Daniel

Send me the DSK & HFE files, i will check this.

[Dantyr]

Hi Jeff,

Follow both the HFE and DSK (renamed to JVC) that I used. The same occur with others as well.

Thanks,
Daniel

[Jeff]

Hi Jeff,

Follow both the HFE and DSK (renamed to JVC) that I used. The same occur with others as well.

Thanks,
Daniel

Hi,

the files look good.

Regarding the firmware version your are using, i suppose that you are using the prototype version?
I am not sure that this hardware version is able to drive the 150ohms pull up present in the Coco.
as far i remember the floppy interface on the prototype used 74LS05 -> 8mA of driving max.

[Dantyr]

I'm using one buit here in Brazil, but based on a russian project. Here pics:





On the board there is two LS01, one LS14 and one LS08.

Thanks!
Daniel

[Jeff]

Well this was one of the designs flaw present in this old prototype version : The buffer used here are not able to drive floppy bus with 150ohms pull up.

Are you sure that you don't want to get the lastest slim version ?
http://lotharek.pl/product.php?pid=91

[Dantyr]

Nice! But where the LCD display go on that design ?

Thanks!
Daniel