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68000 Motherboard User's Manual
Table 17: Sample Output of the Hardware Entropy Generator
MB68k-100A, S/N 001
10101010101010101011010101011010101101010111010101101010101010110101010101010101
01010101010101010101010101010101010101010101010101011010101101010110101010101010
10101010101010101010101101101011101010101011010101010101010101010101010101101010
10101010101010110101010101101010110101101010101101011011010110110110101101101101
01010101110101010101010110110101110101010110101011010101010101011101101010101010
11010101101010110101010101101010101101010101011011010101010110101010101010101010
10110111010101010101101101010101010101010101010101010101010101101101011010101101
01010101010101010110110101010101010110101010101010101010101010101010101010111011
01010101010110101101010101010101010110101101011010101101110101010101010101010110
11010101010111010101101011010101010110101010101101011010101011010101010101101011
01101010101011011010110101010101010101010110101010101010101110101010101110101011
01010101101010101011010101011010101010110101101010110101101010101010101101110101
11010010101010101010101010101010101010101011101010101010101101010101010110110101
01101010110101011010101010101110101101101011010101010101010101010110101010101010
10101010101010101011010101010101010101010101010101101010101011010110101010101010
10111010101010101010110101101010101010101010101010111010101010101011010101010101
MB68k-100A, S/N 002
11100001111110000111111000011111100000000000000000001111111111000011111100001111
11000011111111111111111111111110000000000111100000011110000001111000000000000000
00000000001111111111000011111100001111110000000000111111111111111111111111111111
11100000011110000001111000000111111111111111111111111111110000111111000011111100
00111111111111111111111111111111111111111000000111100000011111111111111111111111
11111111111111110000111111000011111100000000001111111111000000000111111111100001
11111111100000011111111110000000000111111111000000000011110000001111000000111100
00001111111111111111111111111111100001111110000111111000011111100001111110000000
00000000000011110000001111000000111100000011111111111111111111111111111000011111
10000111111000011111100001111111111111111111111111000000000011111111110000111111
00001111110000000000000000000111111111100001111110000111111111111111111111111111
11111111111111111100001111110000111111000000000011101111111111111110000000000111
10000001111000000111111111100000000000000000001111111111000011111100001111110000
00000011110000001111111111111111111000011111100001111110000111111000000000011111
11110000000000111100000011110000001111000000111100000000000000000000000001111000
00011110000001111000000111100000000000000000000000001111000000111100000011110000
7.12. 2.3 On- Board Digital Input Interface
Ref. Des.:
A1CON300
Addr: ONBD_BASE+$C0000 (Clock Synchronization Register), bits 4-7
Size: 4 bit
Open State:
0
The On-Board Digital Input Interface provides four bits of digital input though
A1CON300. Pins 1 through 4 are system negative. The odd pins above that, pins 5, 7, 9
and 11, are system positive. The even pins, 6, 8, 10 and 12, correspond to bits 4-7 of the
Page 36 of 54
Rev. A
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