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diff --git a/z180/modebaud.inc b/z180/modebaud.inc
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+ ; equates for mode byte bit fields
+
+mb$input equ 00000001b ; device may do input
+mb$output equ 00000010b ; device may do output
+mb$in$out equ mb$input+mb$output
+
+mb$soft$baud equ 00000100b ; software selectable
+ ; baud rates
+
+mb$serial equ 00001000b ; device may use protocol
+mb$xon$xoff equ 00010000b ; XON/XOFF protocol
+ ; enabled
+
+baud$none equ 0 ; no baud rate associated
+ ; with this device
+baud$50 equ 1 ; 50 baud
+baud$75 equ 2 ; 75 baud
+baud$110 equ 3 ; 110 baud
+baud$134 equ 4 ; 134.5 baud
+baud$150 equ 5 ; 150 baud
+baud$300 equ 6 ; 300 baud
+baud$600 equ 7 ; 600 baud
+baud$1200 equ 8 ; 1200 baud
+baud$1800 equ 9 ; 1800 baud
+baud$2400 equ 10 ; 2400 baud
+baud$3600 equ 11 ; 3600 baud
+baud$4800 equ 12 ; 4800 baud
+baud$7200 equ 13 ; 7200 baud
+baud$9600 equ 14 ; 9600 baud
+baud$19200 equ 15 ; 19.2k baud
+