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Catastrophe! After adjusting the settings, XT-IDE No longer boots!

Z

Zombie

Experienced Member
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Apr 22, 2011
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125
My Tandy 1000 TL has had a Catastrophe! After adjusting the settings, XT-IDE No longer boots! The system is booting into ROM Mode.
Base Address was 260H, the Memory was D000

I tried to change the configuration from D000 to C800 - C9FF

The card has a Red LED that is not lighting up.

Please help!
 
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You probably have a ROM address conflict, try going back and see if that resolves it.

Changing the ROM address is just a matter of changing DIP switches, but if you want to change the I/O address you need to change the DIP switches and also reconfigure the XUB.
 
I tried, and so far that hasn't worked. I'd like to know what Factory Defaults for an XT-IDE Rev01 are. (What would a Pre-assembled XT-IDE Ship with? Also can you explain XUB?
This is on a Tandy 1000 TL with the full compliment of 768 K RAM, VGA installed and EMS Rremoved.
 
XUB = XTIDE Universal Bios, The defaults for the R1 card are Base I/O 300h and D000 ROM address, If all you did was change the ROM address changing it back to what it originally was should get it working again, I don't own any Tandy's so no idea what the correct address should be. Modem7 has a page on the XT-IDE R1 card [ Here ] There is a link to a picture of the R1 card on that page.
 
This failed, I set it back to the perscribed Defaults. 300h and D000 and its still booting in Rom mode.
I am not getting an Option Rom Screen at all by the way. What are some Diagnostics?
 
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After further investigation, it seems an IC fell out of the card. and was re-seated backwards by the person who was working with me on it without realizing it. It had been power cycled once that way. It was powered on once and the machine wouldn't post. I removed the card and saw what was done and turned it the other way.

Has the single chip put in backwards been fried or has the whole card been fried?

The chip in Question:
MC74F245N
XAH9422
 
'Fell out' :) I would suspect the 245 is toast and possibly other's.

All that is required for the EEPROM access is SW1, RR2, U9, and U10. Also make sure the ROM Enable jumper is on ( JP1 ). Remove all other IC's from their sockets except for those required. Inspect the board for any burnt traces / damage etc. Because you are not getting the XUB screen up it could be the switch settings are wrong or JP1 is off or one of the required's is toast, You could try replacing U9 with the 688 from U6 in the hope that U6 is still good, Get that part working so the XUB screen comes up and then repopulate the other sockets. IC replacement will be necessary.
 
Malc said:
'Fell out' :) I would suspect the 245 is toast and possibly other's.

All that is required for the EEPROM access is SW1, RR2, U9, and U10. Also make sure the ROM Enable jumper is on ( JP1 ). Remove all other IC's from their sockets except for those required. Inspect the board for any burnt traces / damage etc. Because you are not getting the XUB screen up it could be the switch settings are wrong or JP1 is off or one of the required's is toast, You could try replacing U9 with the 688 from U6 in the hope that U6 is still good, Get that part working so the XUB screen comes up and then repopulate the other sockets. IC replacement will be necessary.
Click to expand...

I have a disability that makes this very disability unfriendly. I am considering purchasing an entirely new card, its not possible for this fiasco to damage the ISA Slot is it? The unit would need to be pre-built with a BIOS.
 
I doubt if the ISA slot got damaged, Is there anyone near you that can look at the card for you, 'Glitch' is selling R4 pre-built cards but i don't know if they fit the Tandy, There is also the Lo-tech cards but AFAIK none are being sold yet.
 
Ah. Listen, there is a Financial hardship element to this situation. I'm trying to find a way to get someone to break the payments down to two Segments of $50 over two months or something like that. (I really can't afford it considering my current situation.) What about the option of sending the existing card I have off for repair?
 
Zombie said:
Ah. Listen, there is a Financial hardship element to this situation. I'm trying to find a way to get someone to break the payments down to two Segments of $50 over two months or something like that. (I really can't afford it considering my current situation.) What about the option of sending the existing card I have off for repair?
Click to expand...

Both of these things are fine -- the non-eBay fully assembled+tested price is $85, by the way. Which card do you have? Can you post a picture of it?

If it's a simple repair, like just replacing the blown out IC and retesting/burning in the card, it's not going to cost you much. I also often take hardware in on trade/partial trade.
 
Where are you located?
Its not likely to be a difficult repair and will cost less than a new one depending on how far you need to send it to be repaired.
 
I'm in North America. I can ship too and from Canada. Or the US. The Card is a fully Socketed Revision 1 LoTech XT-IDE
 
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I thought you had the original R1 VCF card, Can you post a link to the card you have on the Lo-tech site www.lo-tech.co.uk or post a pic.
 
So it is the original VCF R1 card with 'N8VEM' in the bottom corner by the bracket IC side and not the lo-tech XT-IDE.
 
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