Tech: Atari IC question

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

I have a question for the higher ups in rgvac about Atari mask ROM IC's. I
am going through a Toobin' board that has a few bad chips (I know from
swapping them with known good ones) - anyhow, the manual states that the
chips in question are:

Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1143
Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1147
Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1144
Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1148
Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1145
Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1149
Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1146
Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1150

Not all of mine are bad - just a couple but I included the whole bank of
them for reference.

What are these and can replacements be obtained? I searched Google and
didn't find any reference to the Atari part numbers.

Thx!


--
-Steve P.

All messages are scanned with Norton Anti-Virus

 

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

Steve Prendergast wrote:

>
> Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1143
> Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1147
> Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1144
> Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1148
> Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1145
> Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1149
> Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1146
> Integrated Circuit, 1M bit, Mack ROM, LH23100 - part# 136061-1150
>


DOH!

Mack ROM = MASK ROM

 

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

Steve Prendergast wrote:
> I have a question for the higher ups in rgvac about Atari mask ROM
IC's. I
> am going through a Toobin' board that has a few bad chips (I know
from
> swapping them with known good ones) - anyhow, the manual states that
the
> chips in question are:
>
> Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1143
> Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1147
> Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1144
> Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1148
> Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1145
> Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1149
> Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1146
> Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1150
>

Ok. I am no tech guy, so let's see how I did researching this on my
own - especially since I am nowhere near a Toobin' PCB to look at for
reference/verification. I poked around the Toobin' schematics and
found that the IC's in question are 27512e Motion Object Graphics ROMs.
I unzipped a copy of the Toobin' ROM images from MAME and it would
appear that the -xxxx at the end of the chip ID above is the ROM image
that is associated to the particular chip. Am I on track so far?

If this is the case and these are 27512's (not having a physical PCB
here at the moment makes it kinda hard to peek and verify), can I use
any 27512 as long as the chip "pinouts" match the originals that Atari
used? I don't know what the technical name for all of this is (you
electronics guys are probably wincing about now) but looking at the
schematics, each pin of the chip is labled with a value. I have to
verify that the pinouts on the new chip match the old, right? As long
as these values are all the same, is the chip satisfactory? Ex: Pin 1
= A15, Pin 3 = A7 etc.

Guru help appreciated.

THANKS!

-Steve P.

 

[Vaxx]

Archived from groups: rec.games.video.arcade.collecting (More info?)

your on the right track working it out for yourself by the looks.

Anyway, the 1M bit rom could be of 2 varities, either the 27c100 (Has A16
and /OE swapped compared to 27010) or the 27010.

All 27512's and 27256 share the same pinout. The ealier the part, the higher
the program voltage (generally) tho.

Just keep on learning


<stevenprendergast@gmail.com> wrote in message
news:1115769976.291642.174040@f14g2000cwb.googlegroups.com...
>
> Steve Prendergast wrote:
> > I have a question for the higher ups in rgvac about Atari mask ROM
> IC's. I
> > am going through a Toobin' board that has a few bad chips (I know
> from
> > swapping them with known good ones) - anyhow, the manual states that
> the
> > chips in question are:
> >
> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1143
> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1147
> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1144
> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1148
> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1145
> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1149
> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1146
> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1150
> >
>
> Ok. I am no tech guy, so let's see how I did researching this on my
> own - especially since I am nowhere near a Toobin' PCB to look at for
> reference/verification. I poked around the Toobin' schematics and
> found that the IC's in question are 27512e Motion Object Graphics ROMs.
> I unzipped a copy of the Toobin' ROM images from MAME and it would
> appear that the -xxxx at the end of the chip ID above is the ROM image
> that is associated to the particular chip. Am I on track so far?
>
> If this is the case and these are 27512's (not having a physical PCB
> here at the moment makes it kinda hard to peek and verify), can I use
> any 27512 as long as the chip "pinouts" match the originals that Atari
> used? I don't know what the technical name for all of this is (you
> electronics guys are probably wincing about now) but looking at the
> schematics, each pin of the chip is labled with a value. I have to
> verify that the pinouts on the new chip match the old, right? As long
> as these values are all the same, is the chip satisfactory? Ex: Pin 1
> = A15, Pin 3 = A7 etc.
>
> Guru help appreciated.
>
> THANKS!
>
> -Steve P.
>

 

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

Cool. Thanks!


--
-Steve P.

All messages are scanned with Norton Anti-Virus

"VaxX" <geoff_gunn@hotmail.com> wrote in message
news:4281ecb0$0$264$61c65585@uq-127creek-reader-03.brisbane.pipenetworks.com.au...
> your on the right track working it out for yourself by the looks.
>
> Anyway, the 1M bit rom could be of 2 varities, either the 27c100 (Has A16
> and /OE swapped compared to 27010) or the 27010.
>
> All 27512's and 27256 share the same pinout. The ealier the part, the
> higher
> the program voltage (generally) tho.
>
> Just keep on learning
>
>
> <stevenprendergast@gmail.com> wrote in message
> news:1115769976.291642.174040@f14g2000cwb.googlegroups.com...
>>
>> Steve Prendergast wrote:
>> > I have a question for the higher ups in rgvac about Atari mask ROM
>> IC's. I
>> > am going through a Toobin' board that has a few bad chips (I know
>> from
>> > swapping them with known good ones) - anyhow, the manual states that
>> the
>> > chips in question are:
>> >
>> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1143
>> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1147
>> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1144
>> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1148
>> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1145
>> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1149
>> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1146
>> > Integrated Circuit, 1M bit, Mask ROM, LH23100 - part# 136061-1150
>> >
>>
>> Ok. I am no tech guy, so let's see how I did researching this on my
>> own - especially since I am nowhere near a Toobin' PCB to look at for
>> reference/verification. I poked around the Toobin' schematics and
>> found that the IC's in question are 27512e Motion Object Graphics ROMs.
>> I unzipped a copy of the Toobin' ROM images from MAME and it would
>> appear that the -xxxx at the end of the chip ID above is the ROM image
>> that is associated to the particular chip. Am I on track so far?
>>
>> If this is the case and these are 27512's (not having a physical PCB
>> here at the moment makes it kinda hard to peek and verify), can I use
>> any 27512 as long as the chip "pinouts" match the originals that Atari
>> used? I don't know what the technical name for all of this is (you
>> electronics guys are probably wincing about now) but looking at the
>> schematics, each pin of the chip is labled with a value. I have to
>> verify that the pinouts on the new chip match the old, right? As long
>> as these values are all the same, is the chip satisfactory? Ex: Pin 1
>> = A15, Pin 3 = A7 etc.
>>
>> Guru help appreciated.
>>
>> THANKS!
>>
>> -Steve P.
>>
>
>