|
Post by Tom Maneiro on Dec 4, 2004 9:13:53 GMT -5
I have disassembled my ol' Genesis Model 1, and listed the following chips:
-SANYO LC3664R2 -SONY CXA1034P -NEC D780C-1 (the Z80, according wth cpu-collection.de) -YAMAHA YM2612 (easy, no?) -SHARP LH5P832D (x2) -SEGA 31-5433 (the VDP?) -SEGA 315-5313 (VDP2?) -MOTOROLA MC68000P8 (the 68K) -SONY CXA1145P -TI (?) LM358P (PSG? TI logo was too small to be a TI logo) -HITACHI HM53461ZP-1256 (x2, RAM?)
Board date: 18OCT1992
What does each of that chips?
|
|
|
Post by Tom Maneiro on Dec 4, 2004 9:33:51 GMT -5
I googled for some of these chips and got these: -CXA1145P : RGB Encoder [SONY] (alldatasheet.co.kr) -CXA1034P stereo Power amplifier (http://zdgeo.tripod.com/ALL/Database_C106DGML026) -LC3664RL IC (?) -LH5P832 CMOS 256K (32K x 8) Pseudo-Static RAM (OK, this may be the RAM) (alldatasheet.co.kr) -HM53461ZP-12: seems to be more RAM (256x4=1024) -315-5313: it is the VDP - LM358P: STMicroelectronics ST Operational Amplifiers TSSOP-8 Dual Low Power There are some questions here: 1)WHAT DOES THESE CHIPS? 2)Where in the heck are the PSG?
|
|
oompa loompa
I AM THE GOVERNATOR
"Git 'Er Dun!"
Posts: 1,301
|
Post by oompa loompa on Dec 6, 2004 16:32:36 GMT -5
-SANYO LC3664R2 <- op-amp -SONY CXA1034P <- Audio mixer -NEC D780C-1 (the Z80, according wth cpu-collection.de) <- Z80 Processor -YAMAHA YM2612 (easy, no?) <- Synthesizer -SHARP LH5P832D (x2) <- 32k RAM -SEGA 31-5433 (the VDP?) <- VDP -SEGA 315-5313 (VDP2?) <- IO and BUS arbiter controller -MOTOROLA MC68000P8 (the 68K) <- 68000 -SONY CXA1145P <- RGB to composite converter -TI (?) LM358P (PSG? TI logo was too small to be a TI logo) <- Audio pre-amp -HITACHI HM53461ZP-1256 (x2, RAM?) <- Video RAM
|
|
|
Post by Tom Maneiro on Dec 10, 2004 18:43:06 GMT -5
This sounds more clear from me. Now... where is the PSG? Integrated on one of these chips?
|
|
oompa loompa
I AM THE GOVERNATOR
"Git 'Er Dun!"
Posts: 1,301
|
Post by oompa loompa on Dec 11, 2004 11:40:14 GMT -5
oh yea, i missed that question =P the psg is inside with the vdp =D, so yuo won't be able to see it
|
|
|
Post by Tom Maneiro on Dec 11, 2004 21:01:17 GMT -5
you mean... INTEGRATED CRAP?
Now i have a question... If any of thse chips get damaged, what chips can i use to replace it (assuming that the damaged chips are not the VDPs, hard to desolder), and how to replace it.
My earphones jack connector are broke in the jack board... How i can fix it without soldering?
|
|
oompa loompa
I AM THE GOVERNATOR
"Git 'Er Dun!"
Posts: 1,301
|
Post by oompa loompa on Dec 13, 2004 12:29:54 GMT -5
the psg isn't a very complicated piece of hardware. it just includes a divider, a 10 bit counter, and some kind of random generator (?, could probably use just a counter for the noise). you could probably make a psg yourself using ttl logic =D, but it'll require lots of parts
you can replace the mixer, op-amp, 68000, z80, ram (both 8k & 32k), audio amp, voltage regulators, and oscillator. these parts are still available today, but are getting scarce
uhm......without soldering..........you could strip the wires going from the genesis to the earphone jack board, and strip the wires of your earphones, and wire them up together and fix it up with some tape =D. i'd only do this if i were desperate, and lived in antartica
|
|
|
Post by Tom Maneiro on Mar 7, 2005 11:42:36 GMT -5
I have dissasembled my 32X, and annotated the chips inside it. But... replace the processors board case is HARD!
Here are the list: Processor Board (ID 171-6842E) -2x Hitachi SH2 (complete data: SH2 4J33 XY0011 HD6417095) -SEGA 315-5818A (VDP?) -SEGA 315-5781A (VDP?) -2x Sanyo LC321664AJ-80 (seems to be the RAM) -NEC d4502161G5 -SEGA 315-5805. -Hitachi 4H2T AC04
Main board (ID 171-6843F) -SEGA 315-5788 -SEGA 315-5684
Board date: 28 OCT 1994
Where is the PWM? And the VDP? And what does these chips?
Another question: I don't have a Genesis AV cable, so i use the RF output. But, if someday i get a 32X game (or a flashcart), will i need an AV cable to get the 32X video output? Or i can still use the RF exit? I ask this, since the 32X does the video mix between the Genesis and 32X pictures... and since i have no AV cable... i will get full 32X pic, or only the Genesis part of the image?
|
|
oompa loompa
I AM THE GOVERNATOR
"Git 'Er Dun!"
Posts: 1,301
|
Post by oompa loompa on Mar 7, 2005 20:21:53 GMT -5
I have dissasembled my 32X, and annotated the chips inside it. But... replace the processors board case is HARD! Here are the list: Processor Board (ID 171-6842E) -2x Hitachi SH2 (complete data: SH2 4J33 XY0011 HD6417095) -SEGA 315-5818A (VDP?) -SEGA 315-5781A (VDP?) -2x Sanyo LC321664AJ-80 (seems to be the RAM) -NEC d4502161G5 -SEGA 315-5805. -Hitachi 4H2T AC04 Main board (ID 171-6843F) -SEGA 315-5788 -SEGA 315-5684 Board date: 28 OCT 1994 Where is the PWM? And the VDP? And what does these chips? you know what, i dunno what many of these chips do. one could figure it out and trace singals around, ie: finding lines that go to the audio output. i just feel that looking up these chips and tracing them out is gonna be a waste of time, and not very useful so someone else will answer this ;D yes, you may use an rf modulator with your 32x. you can use the same rf used in the sega genesis model 2 and connect that directly to the output from the 32x, and then into your tv also, you will need to have the cable that sega manufactures that connects the sega genesis av outputs to the sega 32x av inputs. without this, you will need to make a decision whether you want to only see video produced only by the sega genesis, or video from the sega 32x (not to mention the pwm generator)
|
|
|
Post by Tom Maneiro on Mar 8, 2005 9:44:26 GMT -5
I have that cable, with the Genesis 1 adaptor. The 32X seems to run, although i've tested only with Genesis carts (very tricky to get carts working, it seems that the slot needs cleanup).
Now... you mention that i need to plug my RF modulator? I have a Genesis 1, and the RF modulator plugs to a RCA-style jack, of course that the 32X lacks it. So... how much will cost me an AV cable? Or a RF cable for the 32X? Where can i find that cables?
|
|
oompa loompa
I AM THE GOVERNATOR
"Git 'Er Dun!"
Posts: 1,301
|
Post by oompa loompa on Mar 8, 2005 11:10:26 GMT -5
you need a sega genesis model 2 rf adapter as i said =D for it to work on the 32x. i dunno where you can find the cables, google it
|
|
|
Post by Tom Maneiro on Mar 17, 2005 11:10:02 GMT -5
|
|
oompa loompa
I AM THE GOVERNATOR
"Git 'Er Dun!"
Posts: 1,301
|
Post by oompa loompa on Mar 19, 2005 1:37:12 GMT -5
0.o stock =P
|
|
|
Post by GiGaBiTe on Mar 23, 2005 4:27:30 GMT -5
i have that exact same model of the genesis board i use to test random stuff on, i think its a MK-1601, and there were 3 revisions of the board like that. 1601 1602 and 1603.
if you look at all 3 boards, i dont think sega had the thing fully out of prototype yet, as there are still lots of wires on the first version hat jump half way across the board XD
my MK-1603 looks alot different than that, it has the same type of 68k that macs use. i dont have a 1602 so i cant see how sega cleaned that board up :X
the 1603 doesnt have a ym-2612, its all integrated in with the vdp and such.
|
|
|
Post by Tom Maneiro on Mar 23, 2005 16:06:53 GMT -5
Mine is a 1601, it has no MK at all....
Wait a moment... only the Genesis 3 has the "Genesis-in-a-chip" system! (well, it still has RAM chips")
|
|