Eliminated stage1_assembler-0's need for memory
This commit is contained in:
Jeremiah Orians
parent
785af749a8
commit
45d9394d43
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@ -1,7 +1,7 @@
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## Copyright (C) 2016 Jeremiah Orians
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## This file is part of stage0.
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##
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## stage0 is free software: you an redistribute it and/or modify
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## stage0 is free software: you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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@ -14,51 +14,52 @@
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## You should have received a copy of the GNU General Public License
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## along with stage0. If not, see <http://www.gnu.org/licenses/>.
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# start
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2D2A000f # LOADUI R10 0x0F ; Byte mask
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#: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 is storing our condition code
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# ;; R15 is storing our nybble
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# ;; Prep TAPE_01
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2D201100 # LOADUI R0 0x1100
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2D201100 # LOADUI R0 0x1100
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42100000 # FOPEN_READ
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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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# ;; Main program loop
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# ;; Halts when done
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#:loop 14
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2D211100 # LOADUI R1 0x1100 ; Read from tape_01
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42100100 # FGETC ; Read a Char
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# ;; Check for EOF
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12E00000 # CMPI R14 R0 0
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2C4E0008 # JUMP.GE R14 @.L1
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2D0D00c4 # CALLI R13 @finish
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2CC000b8 # JUMP.NP R0 @finish
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3C000034 # JUMP @hex ; Convert it
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# .L1
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2D210000 # LOADUI R1 0 ; Write to Char to TTY
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42100200 # FPUTC ; Print the Char
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2D0D0038 # CALLI R13 @hex ; Convert it
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12E00000 # CMPI R14 R0 0 ; Check if it is hex
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2C8Effdc # JUMP.L R14 @loop ; Don't use nonhex chars
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2C9B0010 # JUMP.Z R11 @.L99 ; Jump if toggled
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# :loop_1 24
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2CC0fff0 # JUMP.NP R0 @loop ; Don't use nonhex chars
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2C9B0010 # JUMP.Z R11 @loop_2 ; Jump if toggled
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# ;; Process first byte of pair
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05020F0A # AND R15 R0 R10 ; Store First nibble
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B0F0000f # ANDI R15 R0 0xF ; Store First nibble
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0D00002B # FALSE R11 ; Flip the toggle
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3C00ffcc # JUMP @loop
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3C00ffe0 # JUMP @loop
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# .L99
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# :loop_2 38
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2D5F0004 # SL0I R15 4 ; Shift our first nibble
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0502000A # AND R0 R0 R10 ; Mask out top
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B000000f # ANDI R0 R0 0xF ; 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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2D211101 # LOADUI R1 0x1101 ; Write the combined byte
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42100200 # FPUTC ; To TAPE_02
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3C00ffb0 # JUMP @loop ; Try to get more bytes
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3C00ffc4 # JUMP @loop ; Try to get more bytes
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# hex
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# ;; Hex function
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# ;; Converts Ascii chars to their hex values
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# ;; Or -1 if not a hex char
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# ;; Returns to whatever called it
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#:hex 54
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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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@ -86,23 +87,19 @@
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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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# :ascii_num 98
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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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3C00ff88 # JUMP @loop_1
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# :ascii_low a0
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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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3C00ff80 # JUMP @loop_1
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# :ascii_high a8
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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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3C00ff78 # JUMP @loop_1
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# :ascii_other b0
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0D000030 # TRUE R0
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0D01001D # RET R13
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# ascii_comment
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3C00ff70 # JUMP @loop_1
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# :ascii_comment b8
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2D211100 # LOADUI R1 0x1100 ; Read from TAPE_01
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42100100 # FGETC ; Read another char
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1FE0000a # CMPUI R14 R0 10 ; Stop at the end of line
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@ -111,7 +108,10 @@
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2C6Effec # JUMP.NE R14 @ascii_comment ; Otherwise keep looping
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3C00ffe0 # JUMP @ascii_other
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# finish
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# ;; Finish function
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# ;; Cleans up at the end of the program
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# ;; Performs the HALT
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# :finish d4
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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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@ -15,9 +15,7 @@
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; along with stage0. If not, see <http://www.gnu.org/licenses/>.
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:start
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LOADUI R10 0x0F ; Byte mask
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LOADUI R11 1 ; Our toggle
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LOADUI R13 0x600 ; Where we are starting our Stack
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;; R14 is storing our condition code
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;; R15 is storing our nybble
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@ -37,26 +35,21 @@
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FGETC ; Read a Char
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;; Check for EOF
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CMPI R14 R0 0
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JUMP.GE R14 @.L1
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CALLI R13 @finish
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JUMP.NP R0 @finish
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:.L1
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LOADUI R1 0 ; Write to Char to TTY
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FPUTC ; Print the Char
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CALLI R13 @hex ; Convert it
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CMPI R14 R0 0 ; Check if it is hex
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JUMP.L R14 @loop ; Don't use nonhex chars
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JUMP.Z R11 @.L99 ; Jump if toggled
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JUMP @hex ; Convert it
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:loop_1
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JUMP.NP R0 @loop ; Don't use nonhex chars
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JUMP.Z R11 @loop_2 ; Jump if toggled
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;; Process first byte of pair
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AND R15 R0 R10 ; Store First nibble
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ANDI R15 R0 0xF ; Store First nibble
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FALSE R11 ; Flip the toggle
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JUMP @loop
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:.L99
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:loop_2
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SL0I R15 4 ; Shift our first nibble
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AND R0 R0 R10 ; Mask out top
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ANDI R0 R0 0xF ; Mask out top
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ADD R0 R0 R15 ; Combine nibbles
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LOADI R11 1 ; Flip the toggle
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LOADUI R1 0x1101 ; Write the combined byte
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@ -98,16 +91,16 @@
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:ascii_num
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SUBUI R0 R0 48
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RET R13
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JUMP @loop_1
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:ascii_low
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SUBUI R0 R0 87
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RET R13
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JUMP @loop_1
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:ascii_high
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SUBUI R0 R0 55
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RET R13
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JUMP @loop_1
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:ascii_other
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TRUE R0
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RET R13
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JUMP @loop_1
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:ascii_comment
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LOADUI R1 0x1100 ; Read from TAPE_01
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FGETC ; Read another char
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@ -5,6 +5,6 @@ b3a910f18c6bc0ef4aa7a53cb3f0216a9f143319da67ed2a02210fe88b1e1131 roms/forth
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2b9727381aec15a504c0898189fbc2344209d8e04451e3fa5d743e08e38f64cf roms/M0
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24a4d74eb2eb7a82e68335643855658b27b5a6c3b13db473539f3e08d6f26ceb roms/SET
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0a427b14020354d1c785f5f900677e0059fce8f8d4456e9c19e5528cb17101eb roms/stage0_monitor
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f8289dfa9dd92e8a1a48f9a624d5d19e4f312b91bc3d1e0796474b46157ec47a roms/stage1_assembler-0
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85e5c06ac07f2b97d01dfb5454f5a698b3ec6c21fe53bf3fa57b386aac7b9601 roms/stage1_assembler-0
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e4f0ed6e78ae79bb5e4a4fbde36f085dd0469cd6ae036dce5953b3d1c89801ce roms/stage1_assembler-1
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61c1b0f2f628847d9491bd678ac7a23231527cc36493b321612f191674ff3c99 roms/stage1_assembler-2
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