modem7's latest activity

In the case of XT-IDE/XT-CF card, premature failure sounds like a production problem rather than design. 'Mileage will vary', but to...

Some possibilities that I can think of: 1. Bad/corrupted Supersoft/Landmark ROM's. 2. Odd ROM went into even socket, even ROM went into...

There should not be a problem using that chip. In my opinion, use of an IC socket is prudent. The "10" is pointing to the 4K block at...

Confirmed. Supporting diagram at [here]. IBM changed things in the move to the IBM 5160 (IBM XT). In the IBM 5160, the two RAM related...

I now see that RTCDRV.EXE displays them.

That is up to you. For now, I will just create an entry along the lines of, "As reported at xxxxx, it appears that in certain...

The 1701 error message, has many possible causes. You could try the RAYXTMFM tool at [here] and from that, see if the hard drive...

I have added the software to the collection at [here]. What I/O ports is the BC88's MC146818 accessed via ?

The RTCDRV.7z password is: trigem

I do not own a Gotek, but I have recorded earlier threads that concern a Gotek in an IBM PC (IBM 5150). •...

No. Others here might. Those are expected to work. FYI: On a second IBM MDA that I have, the RAM chips are AM9114EPC. Very suspicious...

I looked more at the circuit diagram. U12 and U13: Character - bits 7 to 4 U14 and U15: Character - bits 3 to 0 U8 and U9: Attribute -...

I did that. I am very confident, based on the circuit, and an experiment that I did, that U13 and U15 are for the top 'half' of the...

I suggest that you be careful there. 'Arcade' CGA is not the same as IBM CGA. Discussed by tomxp411 at [here]. Maybe you have a TV that...

Behaviour that I observed today on my Windows 10 computer: I have recently moved from a Windows 10 desktop computer to a Windows 10...