Add the copy ability
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parent
807e67c800
commit
b91f86f1b6
185
gidubba.asm
185
gidubba.asm
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@ -250,9 +250,9 @@ onearg: load r1, uci
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load r1, lci
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breq r0, r1, insln
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;Set a mark
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load r1, ucs
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load r1, ucm
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breq r0, r1, setmrk
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load r1, lcs
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load r1, lcm
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breq r0, r1, setmrk
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;Branch to error
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breq r0, r0, cmderr
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@ -334,55 +334,60 @@ setmrk: load r0, target
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;***
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;Copy to mark (under construction)
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;Copy to mark
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;Check the counter
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copy: xor r0, r0
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load r1, count
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breq r0, r1, cmdp
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;Find the argument line in the save and store its number
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copy: cleq r0, r0, fend
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cleq r0, r0, fend
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;Get the save address of the line
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;High byte
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load r0, eoflod + 1
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store test1 + 1, r0
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store testa + 1, r0
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store readch + 1, r0
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store chsend + 1, r0
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;Low byte
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load r0, eoflod + 2
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store test1 + 2, r0
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store testa + 2, r0
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store readch + 2, r0
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store chsend + 2, r0
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;Check for the save end
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testa: load r0, 0
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chsend: load r0, 0
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load r1, eof
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breq r0, r1, cmdp
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;Restore the buffer start address
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;High byte
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load r0, bfstrt
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store test2 + 1, r0
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store stoch + 1, r0
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;Low byte
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load r0, bfstrt + 1
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store test2 + 2, r0
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store stoch + 2, r0
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;Initialise the character counter
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xor r0, r0
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;Read a character
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test1: load r1, 0
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readch: load r1, 0
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;Check for save and buffer ends
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;Save end
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load r2, eof
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breq r1, r2, test3
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breq r1, r2, feol
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;Buffer end
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load r2, bfsize
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breq r0, r2, test3
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breq r0, r2, feol
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;Store the character in the buffer
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test2: store 0, r1
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stoch: store 0, r1
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;Check for line and save ends
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;Line end
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load r2, lf
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breq r1, r2, test4
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breq r1, r2, incsz
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;Increment the character counter and store it in r3
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;Increment
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@ -394,63 +399,165 @@ test2: store 0, r1
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;Increment the save address
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;Low byte
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load r0, test1 + 2
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load r0, readch + 2
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load r2, const1
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cleq r0, r0, sum
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store test1 + 2, r0
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store readch + 2, r0
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;Add the overflow to the high byte
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load r0, test1 + 1
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load r0, readch + 1
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xor r2, r2
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xor r2, r1
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cleq r0, r0, sum
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store test1 + 1, r0
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store readch + 1, r0
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;Increment the buffer address
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;Low byte
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load r0, test2 + 2
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load r0, stoch + 2
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load r2, const1
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cleq r0, r0, sum
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store test2 + 2, r0
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store stoch + 2, r0
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;Add the overflow to the high byte
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load r0, test2 + 1
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load r0, stoch + 1
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xor r2, r2
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xor r2, r1
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cleq r0, r0, sum
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store test2 + 1, r0
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store stoch + 1, r0
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;Reload the character counter to r0
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xor r0, r0
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xor r0, r3
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;Read the next character
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breq r0, r0, test1
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breq r0, r0, readch
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;Increment and store the string size
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feol: load r2, const2
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cleq r0, r0, sum
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store strsz, r0
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;Force line end
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test3: load r1, test2 + 1
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store test5 + 1 ,r1
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load r1, test2 + 2
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store test5 + 2 ,r1
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load r1, stoch + 1
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store stocr + 1 ,r1
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load r1, stoch + 2
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store stocr + 2 ,r1
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;Store the CR of a newline in the buffer
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load r0, cr
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test5: store 0, r0
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stocr: store 0, r0
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;Increment the buffer address
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;Load the address
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load r0, test2 + 1
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load r1, test2 + 2
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load r0, stoch + 1
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load r1, stoch + 2
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;Increment
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cleq r0, r0, incdw
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;Store the address
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store test6 + 1, r0
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store test6 + 2, r1
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store stolf + 1, r0
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store stolf + 2, r1
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;Store the LF of a newline in the buffer
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load r0, lf
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test6: store 0, r0
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stolf: store 0, r0
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;Return to the command prompt
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test4: breq r0, r0, cmdp
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;Jump to saving
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breq r0, r0, svtarg
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;Increment and store the string size
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incsz: load r2, const1
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cleq r0, r0, sum
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store strsz, r0
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;Save the target at tmp
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svtarg: load r0, target
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store tmp, r0
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load r0, target + 1
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store tmp + 1, r0
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;Load the mark to target
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load r0, mark
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store target, r0
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load r0, mark + 1
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store target + 1, r0
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;Find the marked line in the save and store its number
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cleq r0, r0, fend
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;Store the save address
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;High byte
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load r3, eoflod + 1
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store eofchk + 1, r3
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store cmpadr, r3
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;Low byte
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load r0, eoflod + 2
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store eofchk + 2, r0
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store cmpadr + 1, r0
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;Save the marked line
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cleq r0, r0, eofchk
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;Loop
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;Decrement the counter
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load r0, count
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load r2, cstff
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cleq r0, r0, sum
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store count, r0
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;Check if the mark is a hash
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load r2, cstff
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load r0, target
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brneq r0, r2, incmrk
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load r1, target + 1
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breq r1, r2, incln
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;Increment the mark
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incmrk: load r1, target + 1
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cleq r0, r0, incdw
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store mark, r0
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store mark + 1, r1
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;Increment the line number
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incln: load r0, tmp
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load r1, tmp + 1
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cleq r0, r0, incdw
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store target, r0
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store target + 1, r1
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;Check if the mark is less than the line number
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;Negate the mark and store in tmp
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load r0, mark
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nand r0, r0
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load r1, mark + 1
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nand r1, r1
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cleq r0, r0, incdw
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store tmp, r0
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store tmp + 1, r1
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;Add the high bytes
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load r0, target
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load r2, tmp
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cleq r0, r0, sum
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store tmp, r0
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;Store the overflow in r3
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xor r3, r3
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xor r3, r1
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;Add the low bytes
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load r0, target + 1
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load r2, tmp + 1
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cleq r0, r0, sum
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;Add the overflow to the high byte
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load r0, tmp
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xor r2, r2
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xor r2, r1
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cleq r0, r0, sum
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;Check
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xor r1, r3
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xor r3, r3
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breq r1, r3, cpend
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;Re-increment the mark
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load r0, target
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load r1, target + 1
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cleq r0, r0, incdw
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store target, r0
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store target + 1, r1
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;Loop
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cpend: breq r0, r0, copy
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;***
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@ -1586,9 +1693,9 @@ ucf: data 46
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uch: data 48
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uci: data 49
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ucl: data 4c
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ucm: data 4d
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ucp: data 50
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ucr: data 52
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ucs: data 53
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ucw: data 57
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bslash: data 5c
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uscore: data 5f
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@ -1601,9 +1708,9 @@ lcf: data 66
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lch: data 68
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lci: data 69
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lcl: data 6c
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lcm: data 6d
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lcp: data 70
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lcr: data 72
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lcs: data 73
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lcw: data 77
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del: data 7f
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12
readme.md
12
readme.md
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@ -20,20 +20,22 @@ Usage
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The commands are individual letters that can be followed by one or two
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arguments separated by a comma, all case-insensitive. The first argument
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is a line number between 0 and FFFF and the second a range of lines
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between 0 and FF. To append lines, insert them to any line number after
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the text or to the shortcut hash (#); in other commands line numbers or
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parts of a range after the text are ignored. Instead of a predetermined
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range a prompt to insert the next line appears automatically after the
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previous one has been committed.
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between 0 and FF. To append lines, insert or copy them to any line
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number after the text or to the shortcut hash (#); in other commands
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line numbers or parts of a range after the text are ignored. Instead of
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a predetermined range a prompt to insert the next line appears
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automatically after the previous one has been committed.
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Commands with a single argument:
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* I: Insert lines
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Commands with two arguments:
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* C: Copy to the mark
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* D: Delete lines
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* L: List lines
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Commands with no arguments:
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* M: Set a mark
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* P: Print
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* R: Read from the tape reader or casette drive
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* W: Write to the tape punch or casette drive
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