Because 0.139 predates the push for cycle-accurate CPU simulation of obscure protection chips, it runs beautifully on hardware that would choke on modern MAME builds. Think:
Use clrmamepro or ROMVault to audit your set.
If you want, I can:
This is a detailed guide for MAME 0.139, a specific, highly popular version of MAME (Multiple Arcade Machine Emulator) from early 2010. This version is notable for being the last one before the major internal ROM reorganization (0.140), and it remains a favorite for low-power devices (old PCs, Raspberry Pi 1/2, Dingoo, GP2X) and certain front-ends like MAME4All.
The primary reason the 0.139 set has survived is software compatibility. Not everyone wants to run the latest, sluggish MAME with a bloated UI.
Modern MAME has made leaps in emulating Daphne-era laserdisc games (Dragon’s Lair, Space Ace) with proper seek times. 0.139’s LD emulation is early and crash-prone.
