From: woodcock@bnr.ca (Gregg Woodcock) Newsgroups: rec.games.video.arcade.collecting Subject: Re: TECH: Tempest v3 ROMs Date: 12 Nov 1996 15:07:09 GMT Organization: Bell-Northern Research; Richardson, Texas, USA Lines: 126 Message-ID: <56a3qt$ob7@crchh327.rich.bnr.ca> References: NNTP-Posting-Host: carphc21.rich.bnr.ca X-Newsreader: TIN [version 1.2 PL2] Jeff Hendrix (jeffh@bod.net) wrote: : I am trying to update some tempests to version 3 ROMs (to prevent the : screen from collapsing between players) : I downloaded all the Tempest ROM images from Jess's site and I split apart : the version 3 ROMs to fit on 2716s. When I did checksum compares on these : files against the version 2 ROMs, they were all identical except for ROM : H1 but the readme says that the only ROMs that changed where E1, F1, & : MN1. The readme is definitely wrong; I have confirmed your observations. Here is my tempest.rom file: Tempest board versions -01 and -02 (most boards) use all the ROM sockets. All EPROMs are type 2716 but you can substitute a 4716, 2516, or TMS 2516 (but *NOT* TMS 2716) if you can't find a 2716. loc part num cksm filename --- ---------- ---- ---------- D1 136002-101 ???? E1 136002-102 ???? F1 136002-103 ???? H1 136002-104 ???? J1 136002-105 ???? K1 136002-106 ???? LM1 136002-107 ???? MN1 136002-108 ???? P1 136002-109 ???? R1 136002-110 ???? NP3 136002-111 ???? 136002.111 R3 136002-112 ???? 136002.112 Any of the follwoing ROMs can be interchanged with the corresponding ROMs in the previous set. The 117 ROM is the one responsible for the backdoor to features after scoring 180,000. This rom set is generally referred to as "Version 1". loc part num cksm filename --- ---------- ---- ---------- D1 136002-113 ???? 136002.113 E1 136002-114 ???? 136002.114 F1 136002-115 ???? 136002.115 H1 136002-116 ???? 136002.116 J1 136002-117 ???? 136002.117 K1 136002-118 ???? 136002.118 LM1 136002-119 ???? 136002.119 MN1 136002-120 ???? 136002.120 P1 136002-121 ???? 136002.121 R1 136002-122 ???? 136002.122 NP3 136002-123 ???? 136002.123 R3 136002-124 ???? 136002.124 The '2xx' ROMs replace the corresponding '1xx' ROMs on later released boards. The 217 ROM removes the score backdoors that allow free games and access to test, options, and statistics screens. The first 2 are 2716s and the second 2 are 2532s. This rom set is generally referred to as "Version 2". loc part num cksm filename --- ---------- ---- ---------- F1 136002-217 ???? 136002.217 (2716) R1 136002-222 ???? 136002.222 (2716) J1 136002-235 ???? 136002.235 (2532) P1 136002-237 ???? 136002.237 (2532) Tempest board versions -03 and -04 are strapped to use 2532s (32K instead of 16K for 2716s) and only use every other ROM socket. These boards use the following ROMs which includes a fix that keeps the spot killer from collapsing the screen during the intermissions between 1st and 2nd players in a 2 player game. This ROM set is generally referred to as "Version 3". loc part num cksm filename --- ---------- ---- ---------- D1 136002-133 ???? 136002.133 (121+222) F1 136002-134 ???? 136002.134 (119+120) J1 136002-135 ???? LM1 136002-136 ???? 136002.136 (115+316) P1 136002-137 ???? NP3 136002-138 ???? 136002.138 (123+124) Since most people won't want to restrap a 2716 Tempest board to get the bug fix, here is the 2716 version of the essential 2532 file. There are only 2 difference between the Version 2 ROM set and the Version 3 ROM set. If you replace these 2 ROMs, you will have all of the "Version 3" code changes. The change for the player intermission screen fix is contained in the ROM at H1; I don't know what the ROM at location K1 changes. Please note that Atari never released any 136002.3xx ROMs so if you ever see one, it was done by a hack like you! loc part num cksm filename --- ---------- ---- ---------- H1 136002-316 ???? 136002.316 K1 136002-318 ???? 136002.318 A gamer/operator who shall remain nameless reverse engineered the ROMs enough to find the level table. He constructed some new level shapes that can be played if you replace the ROM at location K1 with the following ROM. Please note that this ROM file competes with the Version 3 ROM set so you must put back the Version 2 ROMs. It should be easy to find the location of the shape data and drop it into the Version 3 ROM at K1; perhaps somebody will actually do this... loc part num cksm filename --- ---------- ---- ---------- K1 136002-418 ???? 136002.418 The following ROMs are from the math box (the smaller, square PCB). The ROM at location A1 is type 74S288 (32 x 8) and all the rest are type 74S287 = AM27S21 (256 x 4). The same ROMs were used in Battlezone, RedBaron, Vortex {a (black and white?) Tempest prototype}, and Tempest. loc part num cksm filename --- ---------- ---- ---------- A1 136002-126 ???? 136002.126 E1 136002-127 ???? 136002.127 F1 136002-128 ???? 136002.128 H1 136002-129 ???? 136002.129 J1 136002-130 ???? 136002.130 K1 136002-131 ???? 136002.131 L1 136002-132 ???? 136002.132 --