Clean and upgrade 486 Part 4 - Upgrading

A small upgrade to the motherboard:
A new button cell socket for the BIOS, more L2 cache memory (512kB) and the best jumper settings for CPU.

486 Motherboard
Brand: DataExpert
Type: EXP4505
Year: 1994
BIOS: AWARD model D444940 version 4.0G
CPU: Intel 486DX4 (3.3V)
L1 Cache: 16KB
L2 Cache: 256KB
DRAM slots: 4 (128 MB max.)
ISA slots: 7
VLB slots: : 3 (32-bit)
Battery: new CR2032 socket

Cache tag chip
New: Old:
Brand: EtronTech Winbond
Type: Em51256C-15PL W24257AK-15

Cache memory chips
New: Old:
Brand: ISSI Winbond
Type: IS61C1024-15N W24M512AK-20

Settings (for jumpers) and more check this websites
https://theretroweb.com/motherboards/...

Youtube links
PCI 486 Motherboard: The P405

Subtitles
I tend to mumble sometimes, so all my videos can be viewed with manual subtitles.
I sometimes correct or add text. This makes my videos clearer.

Chapters
0:00 Intro
3:23 Remove battery
7:30 Remove corrosion
10:21 Place socket
15:04 Test new connections
16:05 Remove old cache
20:29 Bend pins of chips
22:02 Place new cache
23:56 Jumper settings


#486 #retro #computer #nostalgia #nostalgic #nostalji #nostalgie #nostalgico #nostalgi