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Cracking Open the IBM PC Jr.

by Mark Kaelin | 08-06-08

Tags: mark kaelin, techrepublic inc., pc, ibm pc, ibm corp., desktops, hardware, cracking open, ibm pc jr, off topic, classics rock, vintage computers

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RAM chips

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RAM chips
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The red arrows mark the bus chips from our triumvirate of chip manufacturers, Motorola, National Semiconductor, and Texas Instruments.

The yellow box indicates one bank of the RAM chips from Mostek. Each chip is 8KB, making for a total of 64KB when you account for all eight chips.
                                                                                       

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4 extra wiresWin3.1  | 08/05/08
Reason for Jumpersrleugers@...  | 08/06/08
There is another reason for the wires ....beckumsca@...  | 08/08/08
Jumperspanelshop  | 08/14/08
Old Hardware still works.for_merlin@...  | 08/12/08
You forgot to show us...JohnMcGrew@...  | 08/06/08
Dinosaur sightingMark W. Kaelin Techrepublic | 08/06/08
I missed that one. Thanks.JohnMcGrew@...  | 08/07/08
RE: Jump the connection (Cracking Open the IBM PC Jr.)trey.morton@...  | 08/06/08
The white chipRichardKP  | 08/08/08
exactly3_jeeps  | 08/08/08
Correct. Notice however:paajr@...  | 08/08/08
The old eyesRichardKP  | 08/08/08
Thanks Richardpaajr@...  | 08/09/08
ResistorsGeep  | 08/12/08
For Geep; Body, tip, spot [resistors]panelshop  | 08/14/08
The funny componentsmchen@...  | 08/06/08
all nighters on the PC Jr.johnebeach@...  | 08/06/08
Used on boatibmtech  | 08/06/08
RE: Jump the connection (Cracking Open the IBM PC Jr.)Ike_C  | 08/06/08
It harkens back to an age where...JohnMcGrew@...  | 08/07/08
Why they don't make'em like they used toSchoolNetTech  | 08/08/08
Good pointpaajr@...  | 08/08/08
The irony was...JohnMcGrew@...  | 08/09/08
Colleco was a toy,yooper@...  | 08/12/08
Actually, the Coleco "Adam" might have made it...JohnMcGrew@...  | 08/13/08
Mystery Chippaajr@...  | 08/08/08
Mystery chipp.a.ogden@...  | 08/12/08
Groan! I'm feeling very old!william.hacker@...  | 09/18/08
Do something fun with your Jr ... run an IRC client!mbbrutman@...  | 08/09/08
RE: Jump the connection (Cracking Open the IBM PC Jr.)justincardinal2003@...  | 08/12/08
RE: Jump the connection (Cracking Open the IBM PC Jr.)dpresley_50201@...  | 08/13/08
Most Hardware was more advanced that XTbmoon@...  | 09/17/08

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