68k instruction manual

The 68K includes special addressing modes that make it easy to manipulate a data stack structure using any address register. The Program Counter (PC) points to the current instruction. Addressing modes #4: Address Register Indirect with Postincrement mode – the operand is in memory; – the instruction specifies which address register contains the address of the operand in memory; – after the operand address is used, it is incremented by 1, 2 or 4 depending on the operand size (byte, word, long word respectively). Here, we take a look at instructions that cause the 68k to jump to different locations to read different instructions. Part The PC (Program Counter) Part The JMP Instruction. Part The BRA Instruction. Part The SP (Stack Pointer) Part The JSR and RTS Instruction s. Part The BSR Instruction.

Easy Motorola 68k Reference - Free download as PDF File .pdf), Text File .txt) or read online for free. An easy to read and understand quick reference manual for the Motorola/FreeScale 68k microprocessor product line. An excellent resource for all 68k assembly coders. Ypdf Mar 68k Additional manuals (possibly including some repeats): SEIKO_2A27_4J27_7C Mar k. 4 The ’s Instruction Set Application: To add to the contents of an address register and not update the CCR. Note that ADDA.W D0,A0 is the same as LEA (A0,D0.W),A0.

Motorola Instruction Set (1/2). Instruction. Description. Assembler Syntax Condition Codes for Bcc Instructions. Condition Codes set after CMP D0. SERVICE, INSTALLATION AND INSTRUCTION MANUAL. 68KHC, 68KHC Follow the instructions as outlined in this manual. INTRODUCTION. – The stack pointer, SP is updated to point to the top of the frame. • In assembly, the LINK and UNLK instructions are used to facilitate.