rodney's latest activity

I went back to the initial programming of the CPLDs and restored the ICs used in the initial testing. After doing this I was able to get...

I have done a lot of testing, and expanded my list of things to look at. Last night I was even unable to get the CPU to run properly...

I have made a new XT-IDE AT configuration and tested with the primary and secondary IDE ports. It appears to work properly now. I can...

Indeed, I will test other BIOS versions yet. I will add it to my list. However the MR BIOS is the one BIOS in which I have the most...

A few more things resulting from my work so far. Possibly the DMA clock frequency was no issue and probably when the power cycle...

Hi Alvaro, It is great to hear from you! And thanks for your compliments, I appreciate that. Getting to this first prototype is a very...

Apparently the problem of needing many power cycles is not gone yet. There was some fluke which caused a few sooner stable cycles but...

I have done more testing and I have found one of the factors in the problem where I need many power cycles to get the CPU to stay...

Hi rask, Yes, it would require desoldering the PAL chip from the board. Desoldering anything from a PCB, and even working with it and...

Some photos and screenshots to share the happy news And I forgot to mention, the onboard primary IDE interface and floppy drive...

I have done a lot more testing. I took out more ICs on the 5170 mainboard and soldered in more sockets for testing. I tested all my...

It appears that - if - the CPU can keep running, which needs a number of power cycles and resets to get a good startup of the CPU, more...

Hi Ruud, Thanks for the compliment, I am working hard to narrow down the problem, so far it's not too clear what the cause is yet. I...

Hi mogwaay, Thanks for the encouragements, it's much appreciated and great to see your post here. I was also surprised that I got some...

I have fully assembled the mainboard and soldered 1MB of SRAM onto the memory card. Of my 10 CPLDs only 4 are able to erase and program...