VL82C420 Datasheet missing

Mike1978uk — Sat, 08 Mar 2025 22:36:07 GMT

I’m seeking information pertaining to the above VLSI chipset

i’ve searched the web to find details of the pin connections and this was used in number of notebooks using the 486SL CPU

It was part of the SCAMP IV Chipset

VLSI Technology’s notebook chips include the 82C420 System Controller, 82C144 Peripheral Controller, 82C146 PCMCIA

Controller, and the 82C170 LCD Graphics Accelerator. VLSI’s ML Bus is time-multiplexed onto the low 16 bits of the local bus.

I am knocking every door to find the datasheet for the VL82C420

It is known the chip was used in the following notebooks in the 90’s

AST Ascentia 910N
Compaq Lte Elite 4/50CX, 4/75C, 75CX, 75CX
IBM Thinkpad 230Cs
IBM Palmtop PC110

If anyone has the datasheet or pinout then please contact me.

Thanks Mike

Re: VL82C420 Datasheet missing

zikolas — Mon, 28 Apr 2025 15:21:47 GMT

I've also been trying to find the data-sheet for the VL82C420. Appreciate it's before NXP's time but hopefully it's in a vault somewhere, it would be immensely helpful to have it.

Cheers, Nick.

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VL82C420 Datasheet missing

Re: VL82C420 Datasheet missing