Reply 33000 of 53050, by keropi
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- l33t++
feipoa wrote on 2020-03-13, 19:36:I received a very similar board recently and have been looking forward to testing it out. It is the DTK PEM-4030Y. I'm not sure what the difference is between your board and my board (PEM-0036Y), or why DTK made two versions of a similar board. I'm also curious why my board has an AMI BIOS while yours has a DTK BIOS. Would you be willing to share your BIOS image? One odd bit about my board is that it came with a RTC that I haven't encountered before; it's an STMicroelectronics MK48T87B-24. I haven't checked yet, but hopefully it is pin compatible with the Dallas 12887.
wow they sure look very similar in components and placement in regions... maybe mine is a more compact version
I am also interested in the AMIBIOS your board has - let's swap 🤣
edit:
pinout-wise it seems both MK48T87B and DS12887 are compatible - DS just has more ram in it as far as I can see
it is also used in atari falcon systems and it seems DS12887 is indeed a replacement: https://www.exxoshost.co.uk/atari/last/NVRAM/index.htm
and also battery mod for the ST part: http://atari.fox-1.nl/atari-st-tt-falcon/falc … ry-replacement/