Thank you Reolink for sponsoring this video: https://Reolink.com/?aff=633
#vintage #repair #electronics #486
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REOLINK links (affiliated, by purchasing here you're helping me, THANKS!)
๐ธ https://reolink.com/lp/black-friday-cyber-monday-sale/ ?aff=633
๐ธ https://www.amazon.co.uk/stores/page/BF3F9980-B061-4C66-A4F3-BE4805529765?maas=maas_adg_8A11E98E5588EE803C005592DB84EC61_afap_abs&ref_=aa_maas&tag=maas&channel=2024BFCM-Tony359
VOGONS thread: https://www.vogons.org/viewtopic.php?t=103457
TRW link to this MB: https://theretroweb.com/motherboards/s/ask-m1487-89-rev-b1
@bitsundbolts 486 FOREX MB video: https://www.youtube.com/watch?v=34nYvbJeBGo
Deksor's 80h test BIOS: https://1drv.ms/u/s!AukePwK7XyEPhO88mwU5XxiB_X98Uw?e=niiRvZ
This is a 256KB BIOS but it should be 64KB repeated 4 times so it can be trimmed.
00:00 Intro
02:13 Troubleshooting
04:21 BIOS troubleshooting
07:26 Physical inspection
09:18 Reflowing!
13:50 Testing
14:57 Speed troubleshooting
17:25 SiS 486G speed comparison
19:05 L1 mystery
23:16 It works...??
25:54 The right setting!
27:12 Final test!
28:18 8KB or 16KB of L1?
30:31 DOOM!
30:59 Outro