DOS Compatibility Card
Houdini
Accessories1993Rare
An expansion card for the Power Mac 6100 that added a full PC compatibility layer, housing a 25 MHz Intel 486DX/2 processor with 4 MB of dedicated RAM and a shared video buffer. It let users switch between Mac and DOS environments on the same machine — an unusual dual-boot-in-hardware solution that reflected the early 1990s uncertainty about whether PowerPC alone could win over corporate buyers still invested in DOS software.
Identity
- Manufacturer
- Apple
- Model Number
- M1893
Dates & Pricing
- Introduced
- 1993-03-01
- Discontinued
- 1995-01-01
- Release Year
- 1993
- Original Price (Low)
- $599
eBay Sale Prices
Sales
4
Typical Low
$196
25th %ile
Typical High
$355
75th %ile
Avg / Median
$263
$288 med
Full range: $109–$366 across 4 sales
Auction
BIN
BIN + OBO
Median
Typical range
All 4 sales
Apple DOS Compatibility Card 820-0543-A Centris Quadra 610 486SX Houdini TESTED
2026-08-11$109
NOS Vintage APPLE POWER MAC Macintosh PC DOS Compatibility Card w/Y Cable Disks+
2026-07-23$366
Apple Macintosh DOS Compatibility Card 820-0591-A including splitter Y-cable
2026-07-13$351
Vintage APPLE Macintosh DOS Compatibility PDS Card 820-0658-C Untested
2026-05-31$225
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