NCD Explora PRO (XQ)

Published on 2022-04-18 and last edited on 2022-04-23.

Some reverse engineering about this thin client.

State: GPU seems faulty and corroded, need replacement. Rom have been already replaced. Maybe get a PPC debugger/emulator ice-thing could help debugging.

⚓ Chips

Refs on chipManufacturerQtyDescriptionDatasheet
{ti} 5BCE 66k
HCT374
TI3Octal edge-triggered d-type flip-flops with 3-state outputPDF
{S} Y57AD
74F139
National Semiconductor1Dual 1-4 decoder/multiplexerPDF
{S} 58AD
LM2576S
-5.0 P+
National Semiconductor13A Step-down regulator 5V fixedPDF
{L} GAL16V8B
xxx
xxx
Lattice4CPLDPDF
{M} ACT04
XAA602
Motorola1Hex InverterPDF
{IC Designs}
061ASC-1
9548MNK
IC Designs1
{S3 Vision868™} IABE3
86C868-P
9546 38010
HONG KONG
S31
{NEC Japan}
424210-60-G
9540HU020
NEC44-MBIT Dynamic RAMPDF
{AT&T}
PrecisionDAC
ATT20C409-13
9606T 19874743
AT&T116-Bit Interface RAMDAC Dual Clock Synthesizers
{S} E58AB
DS14C241WM
National Semiconductor1
{} LANF7236G-1
DEL 9544
1
{AMD} PCnet™-32
AM79C965AKC
9601APB BT
1993 AMD
AMD1
{IBM PowerPC™} 403GA
PPC 403GA-JC33C1
1Q03012PQ 26H4201
IBM1PowerPC 403GA CPU
{M} F257A
XAA549
Motorola1
{triangle} T545
1117
1
{} 35104S
CSi60
1
{P} P174FCT
257TW A
9547B0C
3
{SEC KOREA}
540Y
KM48C2100AJ-6
SEC4
{S} 57DV
LM386
M-1
National Semiconductor1
{S} S9452BH
DP8392CV-1
National Semiconductor1
{triangle JAPAN}
SLI74CTF0A
F5Y0 119
SEIKO EPSON GROUP1