47 lines
596 B
ArmAsm
47 lines
596 B
ArmAsm
// #LAYOUT# STD * #TAKE
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// #LAYOUT# * KERNAL_0 #TAKE
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// #LAYOUT# * * #IGNORE
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//
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// RS-232 part of the CHRIN routine
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//
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// Based on UP9600 code by Daniel Dallman with Bo Zimmerman adaptations
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#if CONFIG_RS232_UP9600
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chrin_rs232:
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phy_trash_a
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phx_trash_a
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lda #$00
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sta XXX_SAVBYTE
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sta RSSTAT
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jsr up9600_rsin
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bcc !+
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plx_trash_a
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ply_trash_a
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lda #$08 // XXX don't we have some routine for this?
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sta RSSTAT
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lda #$00
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clc
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rts
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!:
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sta XXX_SAVBYTE
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XXX_DOGET4:
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plx_trash_a
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ply_trash_a
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lda XXX_SAVBYTE
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clc
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rts
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#endif // CONFIG_RS232_UP9600
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