\u00a0<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Little Man Computer<\/p>\r\n\r\n\r\n\r\n\r\n\r\n
Little Man Computer – LMC –<\/span>\u00a0is a simulator that mimics the modern computer architecture, known as\u00a0<\/span>von Neumann architecture.<\/span>\u00a0It was a brainchild of Dr Stuart Madnick, invented in 1965; <\/span><\/p>\r\n\r\n\r\n\r\n Since it can model the modern computer, it is still widely used as a teaching tool and should help students understand aspects of the Von Neumann Architecture. <\/span><\/p>\r\n\r\n\r\n\r\n This will help students understand the inputs, outputs, control unit, logic unit, memory and the bus connecting it all together.\u00a0<\/span><\/p>\r\n\r\n\r\n\r\n\r\n\r\n Visit the Little Man Computer simulator and try out your own machine code to see the registers and RAM in operation<\/p>\r\n\r\n\r\n\r\n Check out some Little Man Computer code and information<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n Instruction<\/span><\/p>\r\n<\/td>\r\n Mnemonic<\/span><\/p>\r\n<\/td>\r\n Machine Code<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n Load<\/span><\/p>\r\n<\/td>\r\n LDA<\/span><\/p>\r\n<\/td>\r\n 5xx<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n Store<\/span><\/p>\r\n<\/td>\r\n STA<\/span><\/p>\r\n<\/td>\r\n 3xx<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n Add<\/span><\/p>\r\n<\/td>\r\n ADD<\/span><\/p>\r\n<\/td>\r\n 1xx<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n Subtract<\/span><\/p>\r\n<\/td>\r\n SUB<\/span><\/p>\r\n<\/td>\r\n 2xx<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n Input<\/span><\/p>\r\n<\/td>\r\n INP<\/span><\/p>\r\n<\/td>\r\n 901<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n Output<\/span><\/p>\r\n<\/td>\r\n OUT<\/span><\/p>\r\n<\/td>\r\n 902<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n End<\/span><\/p>\r\n<\/td>\r\n HLT<\/span><\/p>\r\n<\/td>\r\n 000<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n Branch if zero<\/span><\/p>\r\n<\/td>\r\n BRZ<\/span><\/p>\r\n<\/td>\r\n 7xx<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n Branch if zero or positive<\/span><\/p>\r\n<\/td>\r\n BRP<\/span><\/p>\r\n<\/td>\r\n 8xx<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n Branch always<\/span><\/p>\r\n<\/td>\r\n BRA<\/span><\/p>\r\n<\/td>\r\n 6xx<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n Data storage<\/span><\/p>\r\n<\/td>\r\n DAT<\/span><\/p>\r\n<\/td>\r\n \u00a0<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n \u00a0<\/p>\r\n \u00a0<\/p>\r\n \u00a0<\/p>\r\n \u00a0<\/p>\r\n \u00a0<\/p>\r\n \u00a0<\/p>\r\n \u00a0<\/p>\r\n \u00a0<\/p>\r\n xx refers to a Mailbox number (Memory Address)<\/span><\/p>\r\n \u00a0<\/p>\r\n \u00a0<\/span>Example (Using Machine Code)<\/span><\/strong><\/p>\r\n Address<\/strong><\/p>\r\n<\/td>\r\n Instruction<\/strong><\/p>\r\n<\/td>\r\n What it does:<\/strong><\/p>\r\n<\/td>\r\n<\/tr>\r\n Mnemonic<\/strong><\/p>\r\n<\/td>\r\n Machine Code<\/strong><\/p>\r\n<\/td>\r\n<\/tr>\r\n 00<\/span><\/p>\r\n<\/td>\r\n INP<\/span><\/p>\r\n<\/td>\r\n 901<\/span><\/p>\r\n<\/td>\r\n Input a number and put it in the calculator<\/p>\r\n<\/td>\r\n<\/tr>\r\n 01<\/span><\/p>\r\n<\/td>\r\n STA 99<\/span><\/p>\r\n<\/td>\r\n 399<\/span><\/p>\r\n<\/td>\r\n Store the number in the calculator in memory slot 99<\/p>\r\n<\/td>\r\n<\/tr>\r\n 02<\/span><\/p>\r\n<\/td>\r\n INP<\/span><\/p>\r\n<\/td>\r\n 901<\/span><\/p>\r\n<\/td>\r\n Input a number and put it in the calculator<\/p>\r\n<\/td>\r\n<\/tr>\r\n 03<\/span><\/p>\r\n<\/td>\r\n ADD 99<\/span><\/p>\r\n<\/td>\r\n 199<\/span><\/p>\r\n<\/td>\r\n Add the number in memory slot 99 to the number in the calculator<\/p>\r\n<\/td>\r\n<\/tr>\r\n 04<\/span><\/p>\r\n<\/td>\r\n OUT<\/span><\/p>\r\n<\/td>\r\n 902<\/span><\/p>\r\n<\/td>\r\n Output the number which is now in the calculator<\/p>\r\n<\/td>\r\n<\/tr>\r\n 05<\/span><\/p>\r\n<\/td>\r\n HLT<\/span><\/p>\r\n<\/td>\r\n 000<\/span><\/p>\r\n<\/td>\r\n Halt<\/p>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n Lesson Resources<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n <\/p>\r\n\r\n\r\n\r\n\r\n\r\n <\/p>\r\n\r\n\r\n\r\n\r\n\r\n <\/p>\r\n\r\n <\/p>","protected":false},"excerpt":{"rendered":" <\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-361","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mrcottle.co.uk\/WP\/wp-json\/wp\/v2\/pages\/361","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mrcottle.co.uk\/WP\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mrcottle.co.uk\/WP\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mrcottle.co.uk\/WP\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mrcottle.co.uk\/WP\/wp-json\/wp\/v2\/comments?post=361"}],"version-history":[{"count":1,"href":"https:\/\/mrcottle.co.uk\/WP\/wp-json\/wp\/v2\/pages\/361\/revisions"}],"predecessor-version":[{"id":363,"href":"https:\/\/mrcottle.co.uk\/WP\/wp-json\/wp\/v2\/pages\/361\/revisions\/363"}],"wp:attachment":[{"href":"https:\/\/mrcottle.co.uk\/WP\/wp-json\/wp\/v2\/media?parent=361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}The little man\u2019s instruction set:<\/h6>\r\n\r\n\r\n\r\n
These are all the instructions the little man can execute.<\/h5>\r\n
\u00a0<\/h5>\r\n
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\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n