tbc@cbnewsk.att.com (thomas.b.cook) (01/15/91)
I'm looking for schematics to help me repair an old Atari 2600 video game. If you have a drawing, please send me email and we'll figure a way to get it here. thanks, Tom -- Tom Cook BL-PR Princeton,NJ (609)-639-3131 att!pruxg!tbc
terryb@cs.fau.edu (terry bohning) (01/15/91)
tbc@cbnewsk.att.com (thomas.b.cook) writes: > I'm looking for schematics to help me repair an old Atari > 2600 video game. If you have a drawing, please send me > email and we'll figure a way to get it here. > > thanks, > Tom > -- > > Tom Cook BL-PR Princeton,NJ (609)-639-3131 att!pruxg!tbc I remember seeing an article on the 2600 some years ago. It was either in Electronic Servicing (a Howard Sams publication, don't know if it's stilll around, or Radio Electronics. I think it was in ES&T, the full name was (is?) Electronic Servicing and TEchnology. Discussed the most common failures, as I recall.
terryb@cs.fau.edu (terry bohning) (01/16/91)
tbc@cbnewsk.att.com (thomas.b.cook) writes: > I'm looking for schematics to help me repair an old Atari > 2600 video game. If you have a drawing, please send me > email and we'll figure a way to get it here. > I check my 1990 SAMS annual index, and there is a computerfacts package for the ATari CX-2600 (2197-3) and CX-2600A (2196-2). You can call them and order with a charge-card. Howards W. SAMS, Indianapolis, IN, (800)-428-SAMS
totty@flute.cs.uiuc.edu (Brian Totty) (01/16/91)
I would actually be curious to know what kind of stuff actually were used in home video games. Processors, graphic chips, sound chips, amount of memory, etc. Anyone know this info say for: Simple "Pong" games Atari 2600 Atari 7800 Mattel Intellivision Nintendo Sega Genesis (and whatever it's precursor was called) I don't have any of these so I can't open 'em up and look, but I was wondering what kind of technology progression made it in home video games... / Brian Totty o o /__ __ o 1304 W. Springfield Avenue o / / / / Urbana, IL 61801 \_/ "We have corn in /__/ / / totty@cs.uiuc.edu Massachusetts too!"
whit@milton.u.washington.edu (John Whitmore) (01/18/91)
In article <1991Jan15.194359.25217@julius.cs.uiuc.edu> totty@flute.cs.uiuc.edu (Brian Totty) writes: > I would actually be curious to know what kind of stuff actually > were used in home video games. Processors, graphic chips, sound chips, > amount of memory, etc. I got a NEC Turbo Grafix 16 this Christmas, and (naturally) wasted no time in disassembling it. Took about 2 hours. The circuit board had space for "UPD65006", 64-pin QFP (and the part number indicates it is a NEC CMOS gate array of some sort) and "23C1000", a 28-pin DIP, a CMOS 128kB ROM, but both spaces were empty (the ROM presumably would have replaced the plug-in cartridge). The actual chips on the board were: HuC6260 80 - QFP (i.e. eighty-pin quad flat pack) HuC6270 80 - QFP HuC6280 80 - QFP 2@ HSRM20256LM12 28 - flatpack 120 ns SRAM, 32k x 8 bits HSRM2264LM10 28-flatpack 100 ns SRAM , 32k x 8 bits (with a tin plate soldered over it for shielding) 21.4772 MHz oscillator and an eight-pin chip (probably an op amp for the sound circuit). I suspect the memory is 32k x 16 bits, that one of the HuCxxxx chips has the CPU on it, and that the fast memory chip is being run as the video buffer. All the 'HuCxxxx' chips are copyright-stamped 'Hudson', which name also appears on the title screens of some of the video games. If anyone wants to pull one of these apart, the only trick is in building the wrench. Starting with 0.249" hex stock in an indexing head, drill six #66 holes at 60 degree intervals on a .175" diameter circle. Then drill the center with a .180" drill to a depth of 0.140". Clean out the six holes, cement a short #67 hardened rod in each, and grind the end flat. Chuck it in the electric screwdriver, and disassemble away! Curiously, there is no note on the case stating 'No user serviceable parts inside', so I trust I have NEC's blessing in the disassembly effort. John Whitmore