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Author Topic: Arcade Common Microprocessors 80's  (Read 690 times)

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vanwatson

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Arcade Common Microprocessors 80's
« on: December 08, 2014, 09:28:11 pm »

Zilog Z-80 Cpu
   8 bit microprocessor
   16 address lines
   8 data lines
   4 Mhz Processor
   Clock Cycles per second = 0.145
   
Motorola 6809
   8 bit microprocessor
   16 address lines
   8 data lines
   1 MHZ Processor
   Clock cycles per second = 0.420

MOS Technology 6502
   8 bit microprocessor
   16 address lines
   8 data lines
   1 MHZ Processor
   Clock cycles per second = 0.430

How do you know if a CPU is an 8 bit or 16 bit? by counting the data lines or address lines? if you didn't have the data sheets or the internet to look it up, how would you know by looking at the schematic?

Is it true if you know the Microprocessors speed you can get the byte/bit rate?

You take the inversion of the frequency and get the time
1 MHZ  = 0.001 milliseconds
4 MHZ = 0.00025 Milliseconds

For a 1 Mhz CPU , the bit rate is 0.001 milliseconds?
For a 4 Mhz CPU, the bit rate is 0.00025 milliseconds?

What other common CPUs did arcade games use in the 80's?
1.)  Zilog Z-80 Cpu
2.) Motorola 6809
3.) MOS Technology 6502
4.) Which other ones did they use please?

ed12

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Re: Arcade Common Microprocessors 80's
« Reply #1 on: December 08, 2014, 10:18:14 pm »
6808
8080
and rockwell made the 6502 btw
38p70
6800
ds5000

ed
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vanwatson

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Re: Arcade Common Microprocessors 80's
« Reply #2 on: December 08, 2014, 10:34:19 pm »
Thanks I will look up those CPU's

How do you know if a CPU is an 8 bit or 16 bit?
 
By counting the data lines or address lines? if you didn't have the data sheets or the internet to look it up, how would you know by looking at the schematic?

vanwatson

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Re: Arcade Common Microprocessors 80's
« Reply #3 on: December 08, 2014, 10:48:32 pm »
What are some common failures or errors you will get when the Arcades CPU/MPU is going bad or is bad?