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{{motorola title|MC14500 ISA}} | {{motorola title|MC14500 ISA}} | ||
{{isa box | {{isa box | ||
− | | name | + | | name = MC14500 |
− | | developer | + | | developer = Motorola |
− | + | | dev model = proprietary | |
− | | dev model | + | | design = |
− | | design | + | | data size = 1 bit |
− | | data size | + | | inst size = 4 bit |
− | | inst size | + | | inst count = 16 |
− | | inst count | + | | introduction = 1976 |
− | | introduction | + | | version = 1 |
− | | version | + | | format = register-memory |
− | | format | + | | endianness = bi-endian |
− | | endianness | + | | registers = 1 |
− | | registers | + | | sprs = 1 |
− | | sprs | + | | sprs info = RR (result register) |
− | | | ||
}} | }} | ||
The '''MC14500 ISA''' is an [[instruction set architecture]] used in the {{motorola|MC14500}} family of microprocessor. This ISA consists of just 4-bit opcodes forming a total of 16 instructions. | The '''MC14500 ISA''' is an [[instruction set architecture]] used in the {{motorola|MC14500}} family of microprocessor. This ISA consists of just 4-bit opcodes forming a total of 16 instructions. | ||
== Registers == | == Registers == | ||
− | The MC14500B has a single [[register]]: '''result register''' ('''RR''') which always stores the value of the | + | The MC14500B has a single [[register]]: '''result register''' ('''RR''') which always stores the value of the intimidate operation that has been performed. RR can be read directly from pin 15 at any time. RR is also always used as the 2nd operand to any binary ALU operation. |
== Instruction Set == | == Instruction Set == | ||
{{isa | {{isa | ||
| title = MC14500 ISA | | title = MC14500 ISA | ||
− | |||
− | |||
− | |||
| listing = | | listing = | ||
{{inst|mn=NOPO |op=0x0 |act={{l|right|RR|RR}} ; {{l|right|Flag 0|1}}}} | {{inst|mn=NOPO |op=0x0 |act={{l|right|RR|RR}} ; {{l|right|Flag 0|1}}}} |
Facts about "MC14500 ISA - Motorola"
designer | Motorola + |
first launched | 1976 + |
full page name | motorola/mc14500/isa + |
implementation | MC14500 + |
instance of | instruction set architecture + |
instruction count | 16 + |
instruction word size | 4 bit (0.5 octets) + |
name | MC14500 + |
word size | 1 bit (0.125 octets, 0.25 nibbles) + |