Implemented graceful FAILURE and PRINT
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@ -30,6 +30,8 @@ Added hex dump printer DUMP and support words to stage3 FORTH
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Added DOES> and supporting words, and used it to make VARIABLE, CONSTANT, and DEFER in stage3 FORTH
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Added TUCK, MIN, SPACES, :NONAME, FILL, and <> to stage3 FORTH
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Added LSHIFT and RSHIFT to stage2 FORTH
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Added PRINT to stage2 FORTH
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Added Low memory detection to stage2 FORTH and now exits gracefully
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** Changed
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Minor refactor of stage3 FORTH by reepa
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@ -174,7 +174,7 @@ Then we use our M0 Line macro assembler to convert our assembly into hex2 format
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Then we need to assemble that hex into our desired program:
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./bin/vm --rom roms/stage1_assembler-2 --tape_01 temp2 --tape_02 roms/forth --memory 48K
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roms/forth should with the sha256sum of 53619f77736729edc06b79d27d835ada6a4235954c467dd0514e312ec4acf3dc
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roms/forth should with the sha256sum of 3a4a15691297345ac808ce41fae26d5592cd09d759d2feef88c1ef262ddaa5b8
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Our forth will first attempt to evaluate any code in tape_01 and then evaluate any code that the user types in
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(Otherwise there is no way for a forth fan to have a chance against the lisp in terms of being able to bootstrap something cool)
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@ -47,6 +47,10 @@
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;; Loads contents of tape_01
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;; Starts interface until Halted
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:start
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HAL_MEM ; Get total amount of Memory
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LOADR R1 @MINIMAL_MEMORY ; Get our Minimal Value
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CMPSKIP.GE R0 R1 ; Check if we have enough
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JUMP @FAILED_INITIALIZATION ; If not fail gracefully
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LOADR R15 @RETURN_BASE ; Load Base of Return Stack
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LOADR R14 @PARAMETER_BASE ; Load Base of Parameter Stack
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LOADUI R11 $NEXT ; Get Address of Next
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@ -65,6 +69,9 @@
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:Cold_Start
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&Quit_Code
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:MINIMAL_MEMORY
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'00100000'
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:RETURN_BASE
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'00080000'
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@ -74,6 +81,17 @@
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:STRING_BASE
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'000A0000'
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;; FAILED_INITIALIZATION
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:FAILED_INITIALIZATION
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FALSE R1 ; Set output to TTY
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LOADUI R2 $FAILED_STRING ; Prepare our Message
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CALLI R15 @PRINT_Direct ; Print it
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HALT ; Be done
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:FAILED_STRING
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"Please provide 1MB or More of Memory for this FORTH to run
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"
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;; The last function you'll ever need to run
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;; HALT
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:HALT_Text
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@ -1097,9 +1115,9 @@
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&ABORT_Code ; Where assembly is Stored
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:ABORT_Code
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MOVE R2 R1 ; Protect the string pointer and set output to TTY
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CALLI R15 @ABORT_PRINT ; Print our unknown
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CALLI R15 @PRINT_Direct ; Print our unknown
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LOADUI R2 $ABORT_String ; Get our string
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CALLI R15 @ABORT_PRINT ; Print it
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CALLI R15 @PRINT_Direct ; Print it
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LOADUI R0 10 ; NEWLINE
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FPUTC ; Printed
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LOADR R15 @RETURN_BASE ; Load Base of Return Stack
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@ -1110,19 +1128,33 @@
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:ABORT_String
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" was not defined nor a valid number"
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:ABORT_PRINT
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;; PRINT
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:PRINT_Text
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"PRINT"
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:PRINT_Entry
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&ABORT_Entry ; Pointer to ABORT
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&PRINT_Text ; Pointer to Name
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NOP ; Flags
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&PRINT_Code ; Where assembly is Stored
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:PRINT_Code
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POPR R2 R14 ; Load pointer to string
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CALLI R15 @PRINT_Direct ; Trick to allow direct calls
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JSR_COROUTINE R11 ; NEXT
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:PRINT_Direct
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LOAD8 R0 R2 0 ; Get a byte
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ADDUI R2 R2 1 ; Increment to next byte
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CMPSKIPI.NE R0 0 ; If NULL
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RET R15 ; Return to caller
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FPUTC ; Write the CHAR
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JUMP @ABORT_PRINT ; Loop until NULL
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JUMP @PRINT_Direct ; Loop until NULL
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;; strcmp
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:Strcmp_Text
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"STRCMP"
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:Strcmp_Entry
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&ABORT_Entry ; Pointer to ABORT
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&PRINT_Entry ; Pointer to PRINT
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&Strcmp_Text ; Pointer to Name
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NOP ; Flags
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&Strcmp_Code ; Where assembly is Stored
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@ -1,6 +1,6 @@
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8f465d3ec1cba00a7d024a1964e74bb6d241f86a73c77d95d8ceb10d09c8f7b9 roms/CAT
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59f0502748af32e3096e026a95e77216179cccfe803a05803317414643e2fcec roms/DEHEX
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53619f77736729edc06b79d27d835ada6a4235954c467dd0514e312ec4acf3dc roms/forth
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3a4a15691297345ac808ce41fae26d5592cd09d759d2feef88c1ef262ddaa5b8 roms/forth
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4c146297da8c672955698a82207295b28feb389c9856a2c6ea6a60ce7e84260a roms/lisp
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2b9727381aec15a504c0898189fbc2344209d8e04451e3fa5d743e08e38f64cf roms/M0
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24a4d74eb2eb7a82e68335643855658b27b5a6c3b13db473539f3e08d6f26ceb roms/SET
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