FPGA

GAL16V8D 熔丝文件.JED内容求解

2020-02-23 10:36发布

站内问答 / FPGA
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本帖最后由 hm_315 于 2014-3-9 10:38 编辑

小弟现在在做一些PLD关于GAL20V8的实验，做的是一个全加器，按照FM软件的格式写的程序ADD.PLD如下：
  1. GAL20V8
  2. Full Adder
  3. 1    2    3    4    5    6   7   8    9    10   11   12
  4. 13   14   15   16  17   18   19  20   21   22   23   24
  5. NC  Xn   Yn  Cn-1 NC  NC  NC  NC  NC  NC  NC  GND
  6. NC  NC   Fn  Cn  NC  NC  NC  NC  NC  NC  NC  VCC

  8. Fn=Xn*/Yn*/Cn-1+/Xn*Yn*/Cn-1+/Xn*/Yn*Cn-1+Xn*Yn*Cn-1
  9. Cn=Xn*Yn+Xn* Cn-1+Yn* Cn-1

  11. DESCRIPTION
复制代码然后编译得到的ADD.JED熔丝文件如下所示：
  1. *L0
  2. 0000000000000000000000000000000000000000
  3. 0000000000000000000000000000000000000000
  4. 0000000000000000000000000000000000000000
  5. 0000000000000000000000000000000000000000
  6. 0000000000000000000000000000000000000000
  7. 0000000000000000000000000000000000000000
  8. 0000000000000000000000000000000000000000
  9. 0000000000000000000000000000000000000000
  10. 0000000000000000000000000000000000000000
  11. 0000000000000000000000000000000000000000
  12. 0000000000000000000000000000000000000000
  13. 0000000000000000000000000000000000000000
  14. 0000000000000000000000000000000000000000
  15. 0000000000000000000000000000000000000000
  16. 0000000000000000000000000000000000000000
  17. 0000000000000000000000000000000000000000
  18. 0000000000000000000000000000000000000000
  19. 0000000000000000000000000000000000000000
  20. 0000000000000000000000000000000000000000
  21. 0000000000000000000000000000000000000000
  22. 0000000000000000000000000000000000000000
  23. 0000000000000000000000000000000000000000
  24. 0000000000000000000000000000000000000000
  25. 0000000000000000000000000000000000000000
  26. 0000000000000000000000000000000000000000
  27. 0000000000000000000000000000000000000000
  28. 0000000000000000000000000000000000000000
  29. 0000000000000000000000000000000000000000
  30. 0000000000000000000000000000000000000000
  31. 0000000000000000000000000000000000000000
  32. 0000000000000000000000000000000000000000
  33. 0000000000000000000000000000000000000000
  34. 0000000000000000000000000000000000000000
  35. 0000000000000000000000000000000000000000
  36. 0000000000000000000000000000000000000000
  37. 0000000000000000000000000000000000000000
  38. 0000000000000000000000000000000000000000
  39. 0000000000000000000000000000000000000000
  40. 0000000000000000000000000000000000000000
  41. 0000000000000000000000000000000000000000
  42. 0000000000000000000000000000000000000000
  43. 0000000000000000000000000000000000000000
  44. 0000000000000000000000000000000000000000
  45. 0000000000000000000000000000000000000000
  46. 0000000000000000000000000000000000000000
  47. 0000000000000000000000000000000000000000
  48. 0000000000000000000000000000000000000000
  49. 0000000000000000000000000000000000000000
  50. 0111011111111111111111111111111111111111
  51. 0111111101111111111111111111111111111111
  52. 1111011101111111111111111111111111111111
  53. 0000000000000000000000000000000000000000
  54. 0000000000000000000000000000000000000000
  55. 0000000000000000000000000000000000000000
  56. 0000000000000000000000000000000000000000
  57. 0000000000000000000000000000000000000000
  58. 0111101110111111111111111111111111111111
  59. 1011011110111111111111111111111111111111
  60. 1011101101111111111111111111111111111111
  61. 0111011101111111111111111111111111111111
  62. 0000000000000000000000000000000000000000
  63. 0000000000000000000000000000000000000000
  64. 0000000000000000000000000000000000000000
  65. 0000000000000000000000000000000000000000
  66. 00000011
  67. *L2632
  68. 11111100111111111111111111111111111111111111111111111111111111111111111110
  69. *F8CC
  70. 
复制代码
通过查看GAL20V8 的手册，然后查看JED文件内容，第50行代码：
  1. 0111011111111111111111111111111111111111
复制代码的作用是Pinx= !(Pin2 & Pin3)；

那这行代码中全为1的部分，如果全部替代为0，作用是一样的吗？


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6条回答
highend
1楼-- · 2020-02-23 14:23
.........................
hm_315
2楼-- · 2020-02-23 19:53
 精彩回答 2  元偷偷看……
highend
3楼-- · 2020-02-24 00:39
就是过时太久了。    低成本小容量FPGA早就低于 1美金。 都一直在挤压CPLD空间。更不要说GAL，PAL了
guolh
4楼-- · 2020-02-24 04:49
做过jed反编译，不过是好久以前的事了，现在PLD烂便宜，随便换一个吧～
GoldSunMonkey
5楼-- · 2020-02-24 10:42
好古老的东西，当时有着个的时候，兴奋不行了
hjx5548
6楼-- · 2020-02-24 14:33
guolh 发表于 2014-3-10 09:47
做过jed反编译，不过是好久以前的事了，现在PLD烂便宜，随便换一个吧～

反编译用什么软件？

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