mirror of https://github.com/hsoft/collapseos.git
18 lines
360 B
C
18 lines
360 B
C
; *** CPU registers aliases ***
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.equ XH 27
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.equ XL 26
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.equ YH 29
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.equ YL 28
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.equ ZH 31
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.equ ZL 30
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.equ SREG_C 0 ; Carry Flag
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.equ SREG_Z 1 ; Zero Flag
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.equ SREG_N 2 ; Negative Flag
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.equ SREG_V 3 ; Two's Complement Overflow Flag
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.equ SREG_S 4 ; Sign Bit
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.equ SREG_H 5 ; Half Carry Flag
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.equ SREG_T 6 ; Bit Copy Storage
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.equ SREG_I 7 ; Global Interrupt Enable
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