IA88C00 Datasheet, PDF (15/80 Pages) InnovASIC, Inc – Microcontroller

IA88C00
Microcontroller
Set One
FFH
Mode and Control Registers
(Register Addressing Only)
EOH
DFH
DOH
CFH
COH
System Register:
STACK, FLAGS, PORTS, etc.
(Register Addressing Only)
Working Register
(Working Register
Addressing Only)
CFH
Data Sheet
As of Production Version -01
FFH
Bank 1
Bank 0
Set Two
Data Registers
(Indirect Register, Indexed,
STACK or DMA Access Only)
COH
256 Bytes
Data Registers
(All Addressing Modes)
192 Bytes
OOH
Figure 7. IA88C00Registers
Working Register Window
Working registers are those registers found within a moveable 8-register section of the register space.
These moveable 8-register sections are defined by register pointers RP0 and RP1, which are control
registers R214 and R215.
Short 4-bit addresses are used to access working registers. The process of accessing working registers,
shown in a section of Figure 7, occurs as follows:
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