Browse code
(system.tal) Added error handler example
Devine Lu Linvega authored on 15/04/2023 16:49:58
Showing 1 changed files
| 1 | 1 |
new file mode 100644 |
| ... | ... |
@@ -0,0 +1,80 @@ |
| 1 |
+|00 @System &vector $2 &wst $1 &rst $1 &pad $4 &r $2 &g $2 &b $2 &debug $1 &halt $1 |
|
| 2 |
+ |
|
| 3 |
+|0100 |
|
| 4 |
+ |
|
| 5 |
+ ;on-halt .System/vector DEO2 |
|
| 6 |
+ |
|
| 7 |
+ ( underflow ) POP |
|
| 8 |
+ ( overflow ) #00 &l #ffff ROT INC DUP ?&l POP |
|
| 9 |
+ ( divzero ) #02 #00 DIV |
|
| 10 |
+ |
|
| 11 |
+ #80 .System/halt DEO |
|
| 12 |
+ |
|
| 13 |
+BRK |
|
| 14 |
+ |
|
| 15 |
+@on-halt ( addr* inst code -> ) |
|
| 16 |
+ |
|
| 17 |
+ #00 SWP DUP ADD ;err ADD2 LDA2 pstr |
|
| 18 |
+ ;dict/error pstr |
|
| 19 |
+ print-opcode |
|
| 20 |
+ ;dict/at pstr |
|
| 21 |
+ phex LIT2 0a ". #18 DEO #18 DEO |
|
| 22 |
+ #01 .System/halt DEO |
|
| 23 |
+ |
|
| 24 |
+BRK |
|
| 25 |
+ |
|
| 26 |
+@print-opcode ( byte -- ) |
|
| 27 |
+ |
|
| 28 |
+ DUP #20 EQU ?&jci |
|
| 29 |
+ DUP #40 EQU ?&jmi |
|
| 30 |
+ DUP #60 EQU ?&jsi |
|
| 31 |
+ DUP #00 EQU ?&brk |
|
| 32 |
+ #00 OVR #1f AND #20 SFT2 ;opcodes ADD2 pstr |
|
| 33 |
+ DUP #20 AND #00 EQU ?&no-2 LIT "2 #18 DEO &no-2 |
|
| 34 |
+ DUP #1f AND #00 EQU ?&no-k |
|
| 35 |
+ DUP #80 AND #00 EQU ?&no-k LIT "k #18 DEO &no-k |
|
| 36 |
+ DUP #40 AND #00 EQU ?&no-r LIT "r #18 DEO &no-r |
|
| 37 |
+ POP |
|
| 38 |
+ |
|
| 39 |
+JMP2r |
|
| 40 |
+ &brk POP ;opcodes/brk !pstr |
|
| 41 |
+ &jmi POP ;opcodes/jmi !pstr |
|
| 42 |
+ &jci POP ;opcodes/jci !pstr |
|
| 43 |
+ &jsi POP ;opcodes/jsi !pstr |
|
| 44 |
+ |
|
| 45 |
+@phex ( short* -- ) |
|
| 46 |
+ |
|
| 47 |
+ SWP phex/b |
|
| 48 |
+ &b ( byte -- ) DUP #04 SFT phex/c |
|
| 49 |
+ &c ( char -- ) #0f AND DUP #09 GTH #27 MUL ADD #30 ADD #18 DEO |
|
| 50 |
+ |
|
| 51 |
+JMP2r |
|
| 52 |
+ |
|
| 53 |
+@pstr ( str* -- ) |
|
| 54 |
+ &w |
|
| 55 |
+ LDAk #18 DEO |
|
| 56 |
+ INC2 LDAk ,&w JCN |
|
| 57 |
+ POP2 |
|
| 58 |
+JMP2r |
|
| 59 |
+ |
|
| 60 |
+@err |
|
| 61 |
+ =dict/unknown |
|
| 62 |
+ =dict/underflow |
|
| 63 |
+ =dict/overflow |
|
| 64 |
+ =dict/divzero |
|
| 65 |
+ |
|
| 66 |
+@dict |
|
| 67 |
+ &error "Error, 20 "during 20 $1 |
|
| 68 |
+ &unknown "Unkown 20 $1 |
|
| 69 |
+ &underflow "Underflow 20 $1 |
|
| 70 |
+ &overflow "Overflow 20 $1 |
|
| 71 |
+ &divzero "Division 20 "by 20 "zero 20 $1 |
|
| 72 |
+ &at ", 20 "at 20 "# $1 |
|
| 73 |
+ |
|
| 74 |
+@opcodes |
|
| 75 |
+ "LIT $1 "INC $1 "POP $1 "NIP $1 "SWP $1 "ROT $1 "DUP $1 "OVR $1 |
|
| 76 |
+ "EQU $1 "NEQ $1 "GTH $1 "LTH $1 "JMP $1 "JCN $1 "JSR $1 "STH $1 |
|
| 77 |
+ "LDZ $1 "STZ $1 "LDR $1 "STR $1 "LDA $1 "STA $1 "DEI $1 "DEO $1 |
|
| 78 |
+ "ADD $1 "SUB $1 "MUL $1 "DIV $1 "AND $1 "ORA $1 "EOR $1 "SFT $1 |
|
| 79 |
+ &brk "BRK $1 &jmi "JMI $1 &jci "JCI $1 &jsi "JSI $1 |
|
| 80 |
+ |