.:  AndysArcade.De  :.     

(Update 24. May 2018)


[ Game Info | Pictures | Manuals/Datasheets | Repair/Restore | ROMs | Reproductions/Spares | Mixed Stuff ]

NEW (17. Apr. 2006)
Missing:  Pictures of Cocktail, Production Numbers, Weight

Game Info
Overview - Unique Vertical Space Shooter Vector Game from SEGA/GREMLIN, controlled with a spinner, a Fire button and an Add-Ship button.

Description - Tac/Scan was available as a kit for the SEGA Convert-a-Game system. The kit was designed so that an operator could convert from one game to another by simply changing artwork, control panels, game cages (and possibly the orientation of the monitor) without having to re-wire the cabinet. All of this could be done from the front of the cabinet. The game is missing complety any side art. Also there must have been a cocktail version planned, though it seems that no one has seen one so far. The gameplay is kind of unique in all of the three stages. In all stages you control seven ships located at the bottom of the vertical screen with a spinner by moving/turning them left and right so changing the flight direction. In the first stage enemy ships come down from the top and shooting at you. You are of course able to shoot back and by turning the spinner/ships left/right to pass the other ships and their shots. Hit ships are removed from the formation of seven. Occasionally additional friendly ships appear that you're able to put them into the empty slots of your format. The second stage is about the same, but the view is more from behind the own ships. The third stage is pretty impressive, you're flying through a warped tunnel in trying to avoid hitting the walls (kind of 3-D) as seen on the cab to the right.

Cabinet Types - Upright (1982), Cocktail Table? - one can be seen on the sales flyer

PCB(s) - All game PCBs are located in a card cage, accessible from the front of the machine. There are five boards, CPU, Sound, XY Timing, XY Control and the 48k EPROM board with 2716 chips. The CPU Board is unique for each of the SEGA G80 Vector Games in such that it contains a security chip which modifies data for a write instruction to RAM and also a specific Game EPROM. The security algorithm has been hacked and as such CPU boards from other G80 vector games can be used. The main processor is a Z80 running at ~4Mhz, ROM is 48k. The sound prozessor is an i8035. For more information go to the Manuals/Data Sheets or Repair/Restore section.

Monitor -
The Monitor is an Electrohome G08-003, a 19" color XY monitor. It is comprised of a 19" color tube (19VLUP22, the same as a WG6100), an Input Clamping Board, the XY Deflection Board, the Deflection Transistors on a heat sink, the HV Unit and the Neck Board. The G08-003 was known to be pretty unreliable. However there are known improvements. Also there are two components which are not easily availabe, one IC on the Input Clamp PCB and the HV transformer. Both need to be taken from a scrap G08 unit if they are defective. But compared to other XY games the HV transformer is  reliable. See the Repair/Restore section for the G08 FAQ.

Clones/Bootlegs  - 
not known

Prototypes  -  not known

Other Links
» TAC/SCAN on K.L.O.V. ( The "Killer" List of Video Games) - www.klov.com
» TAC/SCAN on Game Archive - http://www.gamearchive.com/....tac_scan.html
» Upright Cabinet - [link]
» Monitor Electrohome G08-001 & G08-003 - [link]
» Cocktail Cabinet  -  searching for pictures other than the flyer...

Manuals/Datasheets/Technical Info

TAC/SCAN - Upright
» Service and Operation Manual incl. Schematics  -  420-0795 (released) - 420-0795 (preliminary)
» G08-001 and G08-003 Monitor Operations and Service Manual incl. Schematics - Sega Manual  - Electrohome Preliminary
» Datasheets for electronic components - CPU Z80A - CPU i8035 - EPROM2716 - EPROM2708 - Static RAM 2114 - D/A Converter AD561J - D/A Converter AD7524 - TTL Logic 74LSxx


Repair Tips
» Electrohome G08 FAQ Version 1.1 (7. Oct. 2002) - http://www.ionpool.net/...G08_FAQ_v1.1.pdf
» SEGA G80 Hardware Reference (25. Oct. 1978) - http://www.ionpool.net/...G80ref_v12.txt
» The Sega Color XY Convert-a-Game System (12. Mar. 2002) - http://www.ionpool.net/...segaxysystem.html
» The Sega/Gremlin X-Y FAQ version 1.6 written by Mark Jenison - Sega XY FAQ 1.6

Restore Pages

» not known

not known

» TAC/SCAN Set 1 -  (22x2716 plus 1x2708) - http://www.ionpool.net/...tacscan_set1_roms.zip - Readme.txt
» TAC/SCAN - Security Free -  (15x2716 plus 1x2708) - http://www.ionpool.net/...tacscan_free.zip - Readme_sec_free.txt


Spares - Generally have a look at the "Link Collection" section to find sources. I can help out with single electronic items, if you don't find them elsewhere. A non conclusive List is in the "Electronics / Parts" section.
Reproductions - I don't know of specific reproductions for this machine. Maybe this has changed. Have a look in the "Link Collection" section:
» not kown


» SEGA G80 Multigame (Clay Cowgill) - http://www.multigame.com/sega_mul.html
» SEGA G80 Rom Hack - replace all 2716 EPROMS by one 27512 - http://www.ionpool.net/....sega_rom_hack.txt
» SEGA Vector Multigame Speech Hack - http://www.ionpool.net/...Sega-speech-board-hack.html
» CoinOp Hack - http://www.ionpool.net/...sega_coin_hack.txt

Mixed Stuff

» How the SEGA security chip was de-crypted - http://www.ionpool.net/...security_hack.txt

.:  :. 
 © Andreas Kraemer 2004 - 2018