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44 lines
1.1 KiB
ArmAsm
44 lines
1.1 KiB
ArmAsm
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; Copyright 2020 faddenSoft. All Rights Reserved.
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; See the LICENSE.txt file for distribution terms (Apache 2.0).
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;
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; Test Rockwell's 65C02 extensions.
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; Assembler: ACME
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!cpu w65c02
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* = $1000
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U_DP = $10 ;don't define
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G_DP = $20 ;define as global project symbol
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L_DP = $30 ;define as local variable
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; Verify both halves of branches are traced. In theory, BBR followed
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; by BBS on the same bit number should be always-taken, but we don't
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; try to model memory.
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bbr0 U_DP,cont0
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rts
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cont0 bbs1 U_DP,cont1
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rts
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!byte $80,$80,$80 ;filler to get different branch offset
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cont1 nop
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; Access the three zero-page values in different ways. Also exercise
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; backward and to-self branches.
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; EDIT: add $30 to a local variable table here
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rmb2 U_DP
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smb3 U_DP
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rmb4 G_DP
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smb5 G_DP
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rmb6 L_DP
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smb7 L_DP
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bback bbr2 U_DP,bback
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bbs3 U_DP,bback
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bbr4 G_DP,bback
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bbs5 G_DP,bback
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bbr6 L_DP,bback
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bbs7 L_DP,bback
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nop
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rts
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