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Latest revision Your text
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| production end    =  
 
| production end    =  
 
| arch              = 1-bit
 
| arch              = 1-bit
| isa              = SBA
+
| isa              = <!-- instruction set architecture                              -->
| word              = 1 bit
+
| word              = 1-bit
 
| proc              = <!-- process, e.g. "8 μm"                                      -->
 
| proc              = <!-- process, e.g. "8 μm"                                      -->
 
| tech              = nMOS
 
| tech              = nMOS
| clock min        = 10 kHz
+
| clock            = <!-- clock speed, e.g. "740 kHz"  IF RANGE, USE PARAM BELOW!  -->
| clock max        = 800 kHz
+
| clock min        = <!-- clock min speed, e.g. "200 MHz"                          -->
 +
| clock max        = <!-- clock max speed, e.g. "900 MHz"                          -->
 
| package          = DIP40
 
| package          = DIP40
 
}}
 
}}
The '''GI SBA''' ('''Sequential Boolean Analyzer''') was a [[microprocessor family|family]] of {{arch|1}} [[microcontroller]]s developed by [[General Instrument|General Instrument's Microelectronics]] division. These microcontrollers served as cheap [[programmable logic controller]]s, replacing old relay system.
+
The '''GI SBA''' ('''General Instrument Microelectronics Sequential Boolean Analyzer''') was a [[microprocessor family|family]] of {{arch|1}} [[microcontroller]]s developed by [[General Instrument|General Instrument's Microelectronics]] division.  
  
 
== Members ==
 
== Members ==
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| {{\|SBA-1}} || 120x1 bits ||  || 31 || external storage
 
| {{\|SBA-1}} || 120x1 bits ||  || 31 || external storage
 
|-
 
|-
| {{\|SBA-2}} || 120x1 bits || 2048x8 bits || 31 || ?ever released?
+
| {{\|SBA-2}} || 120x1 bits || 2048x8 bits || 31 ||
 
|}
 
|}
 
== Architecture ==
 
The SBA family had a large number (over 30) of I/O ports that could all be individually accessed programatically. Additionally, it had a relatively complex scheme of data storage. In total there were 120 words (1-bit each). This was broken down into 4 pages of 30 addresses each. The program had to choose which page it was working with currently and once that was done, any address selection was done on that page.
 
 
{{expand section}}
 
=== ISA ===
 
{{main|general_instrument/sba/isa|l1=SBA ISA}}
 
The SBA family had 8-bit instructions consisting of instructions with immediate and without [[immediate value]]s. In total there were 24 instructions used for arithmetic, I/O, and page switching.
 
  
  
 
{{stub}}
 
{{stub}}

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designerGeneral Instrument +
full page namegeneral instrument/sba +
instance ofmicrocontroller family +
instruction set architectureSBA +
main designerGeneral Instrument +
manufacturerGeneral Instrument +
nameGIM SBA +
packageDIP40 +
technologynMOS +
word size1 bit (0.125 octets, 0.25 nibbles) +