{"id":2219,"date":"2025-04-15T08:24:33","date_gmt":"2025-04-15T08:24:33","guid":{"rendered":"https:\/\/webprojects.cloud\/wordpress\/splatco\/?post_type=spl_knowledgebase&p=2219"},"modified":"2025-06-11T05:23:47","modified_gmt":"2025-06-11T05:23:47","slug":"decmgoifnz-mmllll","status":"publish","type":"spl_knowledgebase","link":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/programming-reference\/instructions-arranged-by-function\/counting-and-related-instructions\/decmgoifnz-mmllll\/","title":{"rendered":"DecMGoIfNZ mm*+,LLLL"},"content":{"rendered":"\n

mm = mm - 1; PC = (mm != 0) ? LLLL : (PC + 1)<\/code><\/p>\n\n\n\n

(A FastTrack<\/a> instruction) “Decrement Memory, go if non-zero”<\/p>\n\n\n\n

Decrements the contents of (number in) data memory location mm<\/code> and tests the result. If the result is non-zero, performs a GoTo to the program line named LLLL<\/code>. If the result is zero, the program continues at the next program line (i.e. does not GoTo).  This is an unsigned 8-bit decrement, so 0 decremented becomes 255.<\/p>\n\n\n\n

mm<\/code> must be a valid data memory (RAM<\/a>) address (depending on which controller you are using). LLLL<\/code> must be a label (name) used on a program line.<\/p>\n\n\n\n

+ From dialect 16 the address argument will be jndexed<\/a> when executed inside a MultiTrack<\/a> task and will be indexed if the instruction is preceded by the IasJ<\/a><\/code>: precode.<\/p>\n\n\n\n

Dialect<\/a> restriction: This instruction is not implemented on boards prior to dialect D=7, but can be used on older boards via automatic translation by SPLat\/PC.<\/p>\n\n\n\n

The shorter form (alias) DMGNZ<\/a> may also be used.<\/p>\n\n\n\n

Indexing: From dialect 15 this instruction can be indexed by adding ‘i’ in front of it.<\/p>\n\n\n\n

See also SetMem<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

mm = mm – 1; PC = (mm != 0) ? LLLL : (PC + 1) (A FastTrack instruction) “Decrement Memory, go if non-zero” Decrements the contents…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2213,"menu_order":4,"template":"","class_list":["post-2219","spl_knowledgebase","type-spl_knowledgebase","status-publish","hentry"],"acf":[],"yoast_head":"\nDecMGoIfNZ mm*+,LLLL - SPLat Controls<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DecMGoIfNZ mm*+,LLLL - SPLat Controls\" \/>\n<meta property=\"og:description\" content=\"mm = mm - 1; PC = (mm != 0) ? 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