
5.3 CIO-DI96 REGISTERS
The CIO-DI96 has 16 registers. Their function is listed on Table 5-2.
Table 5-2. CIO-DI96 Registers
NoneNoneBASE + 7
NoneRead Port 2C DataBASE + 6
NoneRead Port 2B DataBASE + 5
NoneRead Port 2A DataBASE + 4
NoneNoneBASE + 3
NoneRead Port 1C Data BASE + 2
NoneRead Port 1B Data BASE + 1
NoneRead Port 1A Data BASE + 0
WRITE FUNCTIONREAD FUNCTIONADDRESS
NoneNoneBASE + 15
NoneRead Port 4C DataBASE + 14
NoneRead Port 4B DataBASE + 13
NoneRead Port 4A DataBASE + 12
NoneNoneBASE + 11
NoneRead Port 3C DataBASE + 10
NoneRead Port 3B DataBASE + 9
NoneRead Port 3A DataBASE + 8
PORTS 1A, 2A, 3A, and 4A DATA
BASE ADDRESS + 0, +4, +8, and +12
A0A1A2A3A4A5A6A7
01234567
PORTS 1B, 2B, 3B, and 4B DATA
BASE ADDRESS + 1, +5, +9, and +13
B0B1B2B3B4B5B6B7
01234567
PORTS 1C, 2C, 3C, and 4C DATA
BASE ADDRESS + 2, +6, +10, and +14
C0C1C2C3C4C5C6C7
01234567
11
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