External battery jumpers and other stuff. \ VOGONS

External battery jumpers and other stuff.

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First post, by cookertron

Posted on 2017-09-06, 16:30

cookertron Offline

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Rank: Newbie
Posts: 79
Joined: 2017-08-07, 22:01

Hi all,

Bought a working 486 mother but it has had the RTC battery removed can you verify the external battery pins for me please? Or if you know where I can get the manual for this motherboard that would be great 😀

1. Is this the external battery select jumper?
2. Is this the external battery connector?

...and what are these slot for and do I need to put anything in them? They're next to the VGA adapter.

Thank you for your time!

Ant

Asus P5A v1.06, Gigabyte GA-6BXDS, Soyo SY-5EMA (faulty), Viglen 486, Asus SP97-V

Reply 1 of 3, by cookertron

Posted on 2017-09-11, 23:38

cookertron Offline

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Rank: Newbie
Posts: 79
Joined: 2017-08-07, 22:01

What's the rule on bumping posts?

Ant

Asus P5A v1.06, Gigabyte GA-6BXDS, Soyo SY-5EMA (faulty), Viglen 486, Asus SP97-V

Reply 2 of 3, by JidaiGeki

Posted on 2017-09-12, 01:36

JidaiGeki Offline

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Rank: Oldbie
Posts: 592
Joined: 2010-12-22, 14:11
Location: Australia

Hey Ant,

The four pin header is usually where the external battery is connected. The other jumper would probably be for selecting the external battery. Can't find settings for your MS4133 motherboard, but others might have resources to help out. Should be tons of info around about external battery though eg Old 486 CMOS Battery Low

Edit - Oops, fitzpatr has it right - video RAM. Any chance of a photo of the whole board?

Last edited by JidaiGeki on 2017-09-12, 05:18. Edited 1 time in total.

Reply 3 of 3, by fitzpatr

Posted on 2017-09-12, 04:16

fitzpatr Offline

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Posts: 419
Joined: 2016-10-30, 06:50
Location: Ontario, Canada

Regarding the chip sockets, I expect that they are for the CL-GD5428 as a memory expansion. My best guess would be to get chips with matching model numbers as those in the picture here.:
http://www.vgamuseum.info/images/palcal/cirru … 5428_top_hq.jpg

This would increase your choice of resolutions and colour depths if you are using the onboard video. You don't need to put anything in them, it just adds choices. I don't think that the 5428 uses interleaved memory, which means that it shouldn't change the performance.

MT-32 Old, CM-32L, CM-500, SC-55mkII, SC-88Pro, SC-D70, FB-01, MU2000EX
K6-III+/450/GA-5AX/G400 Max/Voodoo2 SLI/CT1750/MPU-401AT/Audigy 2ZS
486 Build

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