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Tac/Scan on the Vectrex
Playablev1.3

Tac/Scan

Sega · 1982

by Daniel Ferrer

Runs at 40 Hz with its Universal Sound Board emulated whole through the jack.

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Runs on
  • UVMC2✓
  • Debug Cart✓
  • Simulator✓
  • Tested on hardware✓
Audio
  • Music (PSG)–
  • PCM–
  • Jack✓
  • Speech–

Details

Original hardware
Sega G80: Z80 (mz80)
Romset
roms/tacscan.zip
Controls
The stick is the spinner. Button 1 fires, button 2 grabs a ship, button 3 inserts a coin, button 4 starts. On the web: Z, X, C, V and the arrow keys.
Analog controls
✓
Orientation
Horizontal game: drawn rotated 90°
Last update
2026-11-08

Changelog

  1. v1.32026-11-08
    • The romset can live in any folder of the card. The game looks in .roms/, then roms/, then searches the whole card, and remembers where it found it (.conf/<romset>.loc), so the next start goes straight there; if it is moved, it is searched for again.
    • Settings go in .conf/ and romsets in .roms/: the UVMC2's menu hides folders whose name starts with a dot, so the card shows only the games. A card set up before keeps everything: the old config/ and roms/ are still read, and nothing is written to them any more.
    • Without the romset on the card the screen says ROM FILE NOT FOUND and the name of the zip it wants.
  2. v1.22026-11-05
    • The Universal Sound Board emulated whole -- its 8035 and the tone and noise generators it drives -- in place of the sampled sound: the coin and the start of a game match MAME's.
    • Runs at 40 Hz, at 300 MHz.
    • Every vector visible: a coloured one is as bright as a white one, and the board's three colour levels are the Vectrex BIOS's own intensity steps. The dimmest were barely visible before.
    • The cabinet's switches as MAME has them (they read 0: cocktail cabinet and odd lives), and the Z80 at the board's own 3.87 MHz instead of 3.0.
    • The picture fitted to the screen, upright as the cabinet's monitor.
    • Fixed: on the cartridge it could say the ROM was missing with tacscan.zip on the card.
    • An options screen at start, after the Vectrex Studio intro: screen vertical or horizontal, refresh, brightness, controls (the buttons can be remapped, and the choice is saved) and calibration.
  3. v1.12026-09-29
    • Plays on hardware with some flicker; sound through the console or the jack.