Uploaded February 2026 | Updated September 2026, 3 weeks ago

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The DTC-1181 looks like it adds a ROM and some SRAM to an IBM PC and as I explore this card, I discover a really odd mystery about it.

-- Video Links

ROM Dumper:
archives.oldskool.org/pub/misc/Software/Utils/ROM_Dumper

RetroWeb DTC 1181: (This will be updated with the new found config info and ROM)
theretroweb.com/expansioncards/s/data-technology-corporation-dtc1181

Mystery NCR Bios:
archive.org/details/NCRBIOS

VCF Pacific Northwest (Seattle)
vcfpnw.org

Extras Channel:
youtube.com/@adriansdigitalbasementextras/featured

My profile on Bluesky:
https://bsky.app/profile/adriansdigitalbasement.com

Adrian's Digital Basement Merch store:
my-store-c82bd2-2.creator-spring.com

Support the channel on Patreon:
patreon.com/adriansdigitalbasement

Adrian's Digital Basement (Main Channel)
youtube.com/channel/UCE5dIscvDxrb7CD5uiJJOiw

My GitHub repository:
github.com/misterblack1?tab=repositories

--- Instructional videos

My video on damage-free chip removal:
youtube.com/watch?v=XQVjwPsVFd8

--- Music

Intro music and other tracks by:
Nathan Divino
@itsnathandivino