73 lines
961 B
ArmAsm
73 lines
961 B
ArmAsm
// #LAYOUT# STD * #TAKE
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// #LAYOUT# * BASIC_0 #TAKE
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// #LAYOUT# * * #IGNORE
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// XXX extend build_segment tool to allow to specify placement range
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#if CONFIG_MEMORY_MODEL_46K || CONFIG_MEMORY_MODEL_50K
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peek_under_roms_via_TXTPTR:
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// Unmap BASIC lower ROM
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lda #$26
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sta CPU_R6510
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// Retrieve value from under ROMs
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lda (TXTPTR), y
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// FALLTROUGH
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peek_under_roms_finalize:
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// Restore memory mapping
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pha
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lda #$27
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sta CPU_R6510
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pla
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// Quit
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rts
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peek_under_roms_via_OLDTXT:
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// Unmap BASIC lower ROM
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lda #$26
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sta CPU_R6510
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// Retrieve value from under ROMs
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lda (OLDTXT), y
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#if HAS_OPCODES_65C02
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bra peek_under_roms_finalize
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#else
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jmp peek_under_roms_finalize
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#endif
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peek_under_roms_via_FAC1_PLUS_1:
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// Unmap BASIC lower ROM
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lda #$26
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sta CPU_R6510
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// Retrieve value from under ROMs
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lda (__FAC1 + 1), y
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#if HAS_OPCODES_65C02
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bra peek_under_roms_finalize
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#else
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jmp peek_under_roms_finalize
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#endif
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#endif
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