MAXQ Core Assembly Guide - Maxim

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MAXQ Core Assembly GuideName Conditions Function@BP[Offs++].B@BP[Offs++].W@BP[Offs++].LWrites or returns the value stored in memory location BP[Offs / Offs * 2 / Offs * 4], thenincrements Offs.DP[0] Data Pointer 0.@DP[0].B@DP[0].WReads from or writes to the memory location (byte / word / long) at DP[0].@DP[0].L@DP[0].B++@DP[0].W++Reads from or writes to the memory location at DP[0], then increments DP[0] by 1 (.B),@DP[0].L++2 (.W) or 4 (.L).@DP[0].B--@DP[0].W--@DP[0].L--Reads from or writes to memory location at DP[0], then decrements DP[0] by 1 (.B), 2(.W) or 4 (.L).DP[1] Data Pointer 1.@DP[1].B@DP[1].WReads from or writes to memory location (byte / word / long) at DP[1].@DP[1].L@DP[1].B++@DP[1].W++Reads from or writes to memory location at DP[1], then increments DP[1] by 1 (.B), 2@DP[1].L++(.W) or 4 (.L).@DP[1].B--@DP[1].W--@DP[1].L--Reads from or writes to memory location at DP[1], then decrements DP[1] by 1 (.B), 2(.W) or 4 (.L).Note that for registers with indexes such as the prefixes, accumulators, loop counters or data pointers, the indexmay be specified in any constant numeric format. So the eleventh accumulator may be referred to as A[10],A[0Ah], or even A[01010b].Predefined Register BitsAlthough registers in module 8 (AP, APC, PSF, IC, IMR, SC, IIR, IPR0, IPR1, CKCN and WDCN) are bitaddressable, names of the bits in these registers are not predefined in MaxQAsm. Except where these bits areexplicitly defined as part of an opcode (such as “move C, #0”), they must be referred to in terms of their parentregister.So while the Carry bit may be cleared by the instructionmove C, #0the Equal bit must be cleared by the instructionmove PSF.0, #0Version 1.2 14 of 43 March 7, 2007
MAXQ Core Assembly GuideData Byte (DB) StatementThe DB statement is used to insert bytes of data into the output hex file at the current assembly location. It can beused in either the code segment or the data segment, and the bytes are inserted in the order they are given.The syntax for the DB statement takes the following form. The “DB” keyword is case-insensitive.db constant [, constant [, constant ...]]The following three types of values may be used as DB constants, and more than one type may be mixed in a DBstatement.• Byte constant values (written in decimal, hex or binary) from 0 to 255. Negative values may not be used.• Character constant values (written as ‘’)• String constant values, written in double quotes. These must be at least one character long and may be multiline.+---------------------------------------------------------------+| Dallas Semiconductor/MAXIM MaxQ Assembler, Version 2.047.0060 |+---------------------------------------------------------------+Last build Mar 2 2007 at 06:00:57Command line: -l -q -b -w db.asmAssembling db.asm for MAXQ20,using 16 accumulators, Fri Mar 02 15:31:34 2007Line: Addr: Opcode======================1:2: org 03:4: 0000: 00 db 05: 0001: 6565 db 101, 101, 255FF6: 0003: 01FF db 01b, 11111111b7: 0004: 0055 db 00h, 55h, 0FFhFF8:9: 0006: 41 db 'A'10: 0007: 4142 db 'A', 'B'11:12: 0008: 5374 db "String", ".", 00h72696E672E0013:14: 000C: 415A db "A", "Z", "';#$"273B2324Note that in order to use the DB statement, the “-b” command line switch must be included when invokingMaxQAsm or an error will result. This command line switch is included automatically when compiling a project fromMAX-IDE.Version 1.2 15 of 43 March 7, 2007
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MAXQ Core Assembly Guide - Maxim

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