diff --git a/example/Autopsy.forth b/example/Autopsy.forth index 7ef4dde..dfee1ef 100644 --- a/example/Autopsy.forth +++ b/example/Autopsy.forth @@ -22,13 +22,13 @@ So some background on the internals. RETRO runs on a virtual machine called Nga. The instruction set is MISC inspired, consisting of just 27 instructions: - 0 nop 7 jump 14 gt 21 and - 1 lit 8 call 15 fetch 22 or - 2 dup 9 ccall 16 store 23 xor - 3 drop 10 return 17 add 24 shift - 4 swap 11 eq 18 sub 25 zret - 5 push 12 neq 19 mul 26 end - 6 pop 13 lt 20 divmod + 0 nop 7 jump 14 gt 21 and 27 ienum + 1 lit 8 call 15 fetch 22 or 28 iquery + 2 dup 9 ccall 16 store 23 xor 29 iinvoke + 3 drop 10 return 17 add 24 shift + 4 swap 11 eq 18 sub 25 zret + 5 push 12 neq 19 mul 26 end + 6 pop 13 lt 20 divmod Four instructions are packed per 32-bit memory location. The assembler allows the instructions to be specified like: @@ -38,7 +38,7 @@ Four instructions are packed per 32-bit memory location. The assembler allows th I shorten the instructions to two letter abbreviations, with '..' for 'nop' and then construct a string with all of these. This will be used to resolve names. The ?? at the end will be used for unidentified instructions. ~~~ -'..lidudrswpupojucaccreeqneltgtfestadsumudianorxoshzren?? +'..lidudrswpupojucaccreeqneltgtfestadsumudianorxoshzrenieiqii?? 'INST s:const ~~~ @@ -61,7 +61,7 @@ Now it's possible to write words to display instruction bundles. The formats are ~~~ :name-for (n-cc) - #27 n:min #2 * &INST + fetch-next swap fetch swap ; + #30 n:min #2 * &INST + fetch-next swap fetch swap ; :display:bundle (n-) unpack '%n,%n,%n,%n s:format s:put ; @@ -95,8 +95,8 @@ To actually display a bundle, I need to decide on what it is. So I have a `valid ~~~ :valid? (n-f) unpack - [ #0 #26 n:between? ] bi@ and - [ [ #0 #26 n:between? ] bi@ and ] dip and ; + [ #0 #29 n:between? ] bi@ and + [ [ #0 #29 n:between? ] bi@ and ] dip and ; ~~~ With this and the `LitCount`, I can determine how to render a bundle. @@ -134,6 +134,7 @@ And now to tie it all together: 'TryToIdentifyWords var :disassemble (an-) + #0 !LitCount [ @TryToIdentifyWords [ dup d:lookup-xt n:-zero?