Sam Stevens
ad50509f26
Added new logic instructions and test program. ASM markers may now start a line with an instruction. Improved logic in location class.
71 lines
1.1 KiB
Plaintext
71 lines
1.1 KiB
Plaintext
Features
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- 4 16-bit Registers
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- 255 8-bit Flag Registers
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- 255 8-bit Ports
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- 0 console in/out
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- 1 tape in/out
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- 2-32 Reserved
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- Others Implementation Specific
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- Program Counter
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- Call Stack 16 x 16-bit
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- 64K x 8-bit Memory
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- MSB / big-endian
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Registers (R) A-D -> 0-3
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Marker (:) :XYZ
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Locations (@)
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Code ASM Type Values
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0x0 P Port 0-255 | 0xFF
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0x1 R Register A-D
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0x2 M Memory 0-65535 | 0xFFFF
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0x3 # Immediate 0-65535 | 0xFFFF | 'a' | "a"
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0x4 F Flag 0-255 | 0xFF
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0x5 A Address In Register A-D
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Instructions
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Code ASM
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Misc
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0x00 NOP
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Registers
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0x10 LOAD R @
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0x11 SAVE R @
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0x12 LOADH R @
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0x13 LOADL R @
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0x14 SAVEH R @
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0x15 SAVEL R @
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Accumulator
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0x20 CLR R
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0x21 ADD R @
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0x22 SUB R @
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0x23 DIV R @
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0x24 MUL R @
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0x25 INC R
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0x26 DEC R
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Logic
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0x30 NOT R
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0x31 AND R @
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0x32 OR R @
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0x33 XOR R @
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0x34 SHL R 0-7 Shift Left
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0x35 SHR R 0-7 Shift Right
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0x36 BTS R 0-7 Bit Set
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0x37 BTC R 0-7 Bit Clear
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Stack
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0x40 CALL #|:
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0x41 RET
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Program Flow
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0x50 HALT
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0x51 JMP #|:
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0x52 JZ R #|:
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0x53 JNZ R #|:
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0x54 JBS R 0-7 #|:
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0x55 JBC R 0-7 #|:
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Program Format
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[...ASM...]
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MEMORY
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0x100 "string abcd"
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100 0x00 00 00
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