120 lines
2.9 KiB
Plaintext
120 lines
2.9 KiB
Plaintext
# :start
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2D2B0001 # LOADUI R11 1 ; Our toggle
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2D2D0600 # LOADUI R13 0x600 ; Where we are starting our Stack
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# ;; R14 will be storing our condition
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0D00002F # FALSE R15 ; Our holder
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# ;; Prep TAPE_01
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2D201100 # LOADUI R0 0x1100
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42100001 # FOPEN_WRITE
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# ;; Prep TAPE_02
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2D201101 # LOADUI R0 0x1101
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42100001 # FOPEN_WRITE
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# :loop
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2D210000 # LOADUI R1 0 ; Read from tty
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42100100 # FGETC ; Read a Char
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A030000d # CMPSKIPI.NE R0 13 ; Replace all CR
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2D20000a # LOADUI R0 10 ; WIth LF
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42100200 # FPUTC ; Display the Char to User
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# ;; Check for Ctrl-D
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A0300004 # CMPSKIPI.NE R0 4
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3C0000d0 # JUMP @finish
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# ;; Check for EOF
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2CC000cc # JUMP.NP R0 @finish
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# :.L1
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2D211101 # LOADUI R1 0x1101 ; Write to TAPE_02
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42100200 # FPUTC ; Print the Char
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2D0D0034 # CALLI R13 @hex ; Convert it
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2CC0ffd4 # JUMP.NP R0 @loop ; Don't use nonhex chars
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2C9B0010 # JUMP.Z R11 @.L99 ; Jump if toggled
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# ;; Process first byte of pair
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B0F0000f # ANDI R15 R0 0x0F ; Store First nibble
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0D00002B # FALSE R11 ; Flip the toggle
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3C00ffc4 # JUMP @loop
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# :.L99
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2D5F0004 # SL0I R15 4 ; Shift our first nibble
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B000000f # ANDI R0 R0 0x0F ; Mask out top
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0500000F # ADD R0 R0 R15 ; Combine nibbles
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2D1B0001 # LOADI R11 1 ; Flip the toggle
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2D211100 # LOADUI R1 0x1100 ; Write the combined byte
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42100200 # FPUTC ; To TAPE_01
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3C00ffa8 # JUMP @loop ; Try to get more bytes
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# :hex
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# ;; Deal with line comments starting with #
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1FE00023 # CMPUI R14 R0 35
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2C5E0060 # JUMP.E R14 @ascii_comment
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# ;; Deal with line comments starting with ;
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1FE0003b # CMPUI R14 R0 59
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2C5E0058 # JUMP.E R14 @ascii_comment
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# ;; Deal with all ascii less than '0'
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1FE00030 # CMPUI R14 R0 48
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2C8E0048 # JUMP.L R14 @ascii_other
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# ;; Deal with '0'-'9'
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1FE00039 # CMPUI R14 R0 57
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2C7E0028 # JUMP.LE R14 @ascii_num
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# ;; Deal with all ascii less than 'A'
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1FE00041 # CMPUI R14 R0 65
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2C8E0038 # JUMP.L R14 @ascii_other
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# ;; Deal with 'A'-'F'
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1FE00046 # CMPUI R14 R0 70
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2C7E0028 # JUMP.LE R14 @ascii_high
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# ;; Deal with all ascii less than 'a'
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1FE00061 # CMPUI R14 R0 97
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2C8E0028 # JUMP.L R14 @ascii_other
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# ;; Deal with 'a'-'f'
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1FE00066 # CMPUI R14 R0 102
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2C7E0010 # JUMP.LE R14 @ascii_low
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# ;; Ignore the rest
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3C00001c # JUMP @ascii_other
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# :ascii_num
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11000030 # SUBUI R0 R0 48
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0D01001D # RET R13
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# :ascii_low
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11000057 # SUBUI R0 R0 87
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0D01001D # RET R13
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# :ascii_high
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11000037 # SUBUI R0 R0 55
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0D01001D # RET R13
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# :ascii_other
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0D000030 # TRUE R0
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0D01001D # RET R13
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# :ascii_comment
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2D210000 # LOADUI R1 0 ; Read from tty
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42100100 # FGETC ; Read another char
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A030000d # CMPSKIPI.NE R0 13 ; Replace all CR
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2D20000a # LOADUI R0 10 ; WIth LF
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42100200 # FPUTC ; Let the user see it
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1FE0000a # CMPUI R14 R0 10 ; Stop at the end of line
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2D211101 # LOADUI R1 0x1101 ; Write to TAPE_02
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42100200 # FPUTC ; The char we just read
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2C6Effe0 # JUMP.NE R14 @ascii_comment ; Otherwise keep looping
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3C00ffd4 # JUMP @ascii_other
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# :finish
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2D201100 # LOADUI R0 0x1100 ; Close TAPE_01
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42100002 # FCLOSE
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2D201101 # LOADUI R0 0x1101 ; Close TAPE_02
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42100002 # FCLOSE
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FFFFFFFF # HALT
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