List of Mnemonics


⇦ list 20...2F   ⇧ table   list 40...4F ⇨

Opcode Mnemonic Description
30 STP Store A in pointer p
31 STQ Store A in pointer q
32 STR Store A in stack pointer s
34 PUSH Push A on the stack, decrement s
35 DATA Read word from RAM/ROM Data (AB) into register (p…p+I)
37 RTN Return from subroutine
38 #b JRZP #b Jump relative by plus #b bytes if Zero flag set
39 #b JRZM #b Jump relative by minus #b bytes if Zero flag set
3A #b JRCP #b Jump relative by plus #b bytes if Carry flag set
3B #b JRCM #b Jump relative by minus #b bytes if Carry flag set

 

Language Conventions.

Processor ROM
The SC61860 CPU of the little PC has an internal ROM that can be reached with special subroutine jumps (see E0 #m CAL00 #m). It can only be read with the 35 DATA command, not with Basic’s PEEK. High- and low-byte of the starting address are in the registers B and A, respectively. The word has length I+1.

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