Quick Missile Command ROM question

[modessitt]

Well, I have a ROM burner (which I haven't learned how to use yet), and was thinking about just pulling the ROMs and verifying they are good. How does this work on the 2708 1k images when the MAME files are the 2716 2k images?

 

[modessitt]

Update:

After finding out that my ROM burner does not support 2708's, I have found some 2716's on a parts board and will be burning a new set of ROMs for it and doing the jumper mod.

Of course, the guy who came over to show me how to use my ROM burner didn't bring his UV eraser because I told him I had one, but then couldn't find the damn thing. So, I gave him the chips to take home to burn for me, and I'll continue to look for the damn UV eraser - and track down another newer ROM burner for those chips not supported by my old ROM burner...

 

[mrbill08]

Update:

After finding out that my ROM burner does not support 2708's, I have found some 2716's on a parts board and will be burning a new set of ROMs for it and doing the jumper mod.

Of course, the guy who came over to show me how to use my ROM burner didn't bring his UV eraser because I told him I had one, but then couldn't find the damn thing. So, I gave him the chips to take home to burn for me, and I'll continue to look for the damn UV eraser - and track down another newer ROM burner for those chips not supported by my old ROM burner...

A trusty ol' Data I/O is just the ticket for ancient proms and eproms.

Bill

 

[modessitt]

A trusty ol' Data I/O is just the ticket for ancient proms and eproms.

Bill

Unfortunately, I have a BP EP-1, and it'll do 2716's, but not 2708's...

 

[ELutz]

Unfortunately, I have a BP EP-1, and it'll do 2716's, but not 2708's...

Honestly, very few programmers can do 2708's. You have to get some crazy expensive modern high end programmer (and even then 2708's is uncommon).....or some old thing "of the era". The good thing...your run-ins with 2708 will be far and few.

Edward

 

[modessitt]

BTW - I know little of EPROMs, yet I doubt that every single 2K EPROM is a 2716, every single 1K EPROM is a 2708 etc. So - if I need a 2K EPROM for a board (Missile Command in this case) as found by checking MAWS, does it HAVE to be a 2716? And if so, how do I KNOW I need a 2716, especially if the chip is missing and a manual or schematic isn't available?

And - is there a database somewhere that lists all the known EPROM types for each game - as well as how many of each? If not, why hasn't anyone started one yet? I got lucky to find an old Piranha board with a bunch of 2716's on it, but it would have been nice to check a list of all known game boards that used 2716's rather than go searching through my stack of parts boards....

 

[ELutz]

Mod, I do not know of any list.....but you do have to be slightly careful with 2716 EPROMs. All 2716 EPROMs are the same EXCEPT for 2716s made by Texas Instruments. They will have a prefix of "TMS". These are tri-voltage EPROMs. They use 5VDC, 12VDC and -5VDC. All other 2716's operate on just 5VDC. So, any TMS2716 is not the same as any other 2716. Also, most programmers will not program a TMS2716. To complicate matters more.....Texas Instruments decided to make a EPROM compatible with the other manufacturters 2716s.....they called it a 2516. Confused yet?

Edward

 

[DarrenF]

This information is often in the driver information found on MAWS. It was often collected by people dumping the ROMs. For example: http://maws.mameworld.info/maws/driverinfo/missile.c contains the following:

MISSILE COMMAND CHIP PLACEMENT

USES 6502A CPU

THERE ARE AT LEAST THREE VERSIONS, SET 1 HAS ALL 2716 ROMS (-02)
SET 2 HAS ALL 2708 ROMS EXCEPT LM1, SET 3 HAS 2716 ROMS (-01)

CHIP # POSITION TYPE
SET 1 SET 3
-------------------------------------------------
035820-02 H1 2716 035820-01
035821-02 J/K1 " 035821-01
035822-02 K/L1 " 035822-01
035823-02 L/M1 " 035823-01
035824-02 N/P1 " 035824-01
035825-02 R1 " 035825-01

SET 2
------------------------
MC D1 2708
MC E1 "
MC F1 "
MC H1 "
MC JK1 "
MC KL1 "
MC LM1 2716
MC MN1 2708
MC NP1 "
MC R1 "
MC R3 "
MMI 7603 L7 PROM (82S123)

 

[modessitt]

UPDATE - While waiting on my ROM burner to be upgraded, I got a friend to burn me some 2716's that I provided. Installed them, did the jumpers, and the game is up and running just fine now...