Exploded Mac 128K
Apple's baby picture
On January 24th, Apple Computer will introduce Macintosh. And you'll see why 1984 won't be like "1984." - TV commercial for the Macintosh
Awwww, look at those circuits.... isn't it cute?
The integrated circuits of the Mac 128k:
- a Motorola MC68000 microprocessor at clock speed 7.8336 MHz
- 64 or 128 KB of ROM in two chips containing parts of the operating system
- 128 or 512 KB of RAM in 16 chips
- eight TTL chips implementing a video and sound DMA controller, plus
- two TTL chips providing a 16-bit video buffer (74166 type)
- one PAL chip generating video timing signals (LAG)
- two TTL chips providing an 8-bit Pulse-width modulation sound driver (74LS161 type)
- two analog chips providing sound amplification (MC14016 switch, LF353 op-amp)
- a Zilog 8530 chip controlling two RS-422 buses through two driver chips
- an Integrated Woz Machine 400 KB floppy disk controller plus support PAL (ASG)
- a 6522 VIA bridge chip connecting to the keyboard and clock
- an Apple real-time clock chip plus a 32.768 kHz quartz oscillator
- an Intel 8021 microcontroller in the keyboard
- bus control and extra logic including
- two PAL chips to activate the other chips (BMU0/1)
- two PAL chips to convert the 16 MHz clock to other timing signals (TSM, TSG)
- two TTL chips buffering the RAM to the 68000 (74LS244 type)
- some inverters (74LS04 type)
Credit to Wikipedia for helping us with those memories. We can't remember the specs to all our former computers off the tops of our heads. (Revoke our geek cards if you must.) If you want to reminisce about the baby that started the line of Apple computers, this is the t-shirt for you.
An exploded Mac 128 printed in black on a 100% cotton charcoal colored t-shirt.
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