Recent content by boggit

Excellent! I will do that. HM6818P seems to be fully equivalent to several other chips as well, including MC146818, as per [here], so those should all be replaceable with at least the nwX287 build that I bought (ie the BQ3285 one).

Tested now. Works flawlessly! Maybe @modem7 could note this as well on the page regarding dallas replacement chips on his website?

I'm receiving the nwX287 module today. I will report back once I've tried it!

Ah wait, I got the info on BQ3285 from the nwX287 github (my bolding): Seems promising, no?

From what I have understood, BQ3285 has auto-detection for Intel/Motorola mode and defaults to Intel mode if pin 1 is floating. As my current RTC chip has pin 1 as NC, I should be fine, right? EDIT: no wait, I realized upon double-checking the datasheet for BQ3285 that this is not the case. My...

I will look at that as soon as I have the opportunity to. Thanks! I'm in Stockholm. I have no way of fixing those traces by myself, but even apart from that, the nwX287 - if it indeed works - would be preferable as it would remove the requirement for an external battery (currently a big, chunky...

Anyone? It would at least be good to know if i might damage my motherboard if I try this solution.

This is from the github page: Not sure if the latter part is applicable in my case?

Thank you! Here is the nwX287 GitHub page, with datasheet equivalent: https://github.com/necroware/nwX287 EDIT: The build I bought uses the BQ3285 chip, not the BQ4285 one. EDIT 2: And [here] is the datasheet for HD146818, which is completely interchangeable with the HM6818P chip that I...

I have a [286 motherboard] (with a 16mhz cpu) that works fine except for bad traces between battery and RTC/CMOS chip, making it so that CMOS and time/date settings are lost if the computer is turned off for more than 15 minutes or so. As I lack the skills and equipment to fix the traces via...

Yeah, I was actually thinking it might be a good idea to scan the pages and send them to you, so you could upload them to your website. I am not in my apartment right now, but at least the monitor settings differs between the Copam board and the IBM one. Yeah, there wasn't any hard drive manual...

It seems to be properly hooked up to the motherboard. If I press it when the system is booting up, it goes to red (for 8mhz speed), but as soon as DOS starts booting, it goes back to green again. Ie the button is not unresponsive, and when I turn on turbo the software route (PCSPEED 8), the LED...

👆 That is, after switching DIP 3 and 4 to off, the 3.5" works fine even with the hdc unslotted and the mfm drive disconnected

Oooh right! That explains it. Thank you! In that case, formatting the CF card and installing DOS 2.1 on it should do the trick for being able to transfer files between the two drives, right? Pardon? By the way, I have figured out the floppy issue! • When reconnecting the hdc and the mfm...

Ah, no, I meant if I run extension cables from the pins on the motherboard back to the standard keyboard connector place at the other side of the motherboard. If I do that, I will obviously have to move the connector as well, and preferably fasten it somehow. Soldering is not an option.