41 lines
590 B
ArmAsm
41 lines
590 B
ArmAsm
// #LAYOUT# STD * #TAKE-HIGH
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// #LAYOUT# * BASIC_0 #TAKE-HIGH
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// #LAYOUT# * * #IGNORE
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// This has to go $E000 or above - routine below banks out the main BASIC ROM!
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//
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// Helper routine to copy string descriptor
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//
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#if CONFIG_MEMORY_MODEL_46K || CONFIG_MEMORY_MODEL_50K
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helper_strdesccpy:
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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 pointer to destination
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ldy #$00
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lda (VARPNT), y
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sta DSCPNT+0
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iny
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lda (VARPNT), y
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sta DSCPNT+1
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iny
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lda (VARPNT), y
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sta DSCPNT+2
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// Restore default memory mapping
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lda #$27
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sta CPU_R6510
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rts
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#endif
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