Differences

This shows you the differences between two versions of the page.

--- ref:zmodem [2020/12/01 22:12] – [Frame Header] Add Frame Info column digital man
+++ ref:zmodem [2021/02/13 15:24] – [ZMODEM Frame] clarify the significance of 0x8A digital man
@@ Line 67: / Line 67: @@
 ==== ZMODEM Frame ====
-There 2 classes of ZMODEM Frames:
+There are 2 classes of ZMODEM Frames:
-  * Hexadecimal (HEX) frames, contain only US-ASCII characters
+  - Hexadecimal (HEX) frames, containing only US-ASCII characters
-  * Binary (BIN16 or BIN32) frames, contain //almost// all possible 8-bit octet values
+  - Binary (BIN16 or BIN32) frames, containing //almost// all possible octet values
 === HEX Frame ===
   <frame header> [CR] LF [XON]
-HEX frames are terminated with an ASCII linefeed character. Some ZMODEM implementations send the HEX frame terminating linefeed character with the high bit set (0x8A). Also, for some HEX frame types, the frame terminator may be followed by an XON (0x11) character ("transmit on" in so-called "software flow control").
+HEX frames are terminated with an ASCII linefeed character. Some ZMODEM implementations send the HEX frame terminating linefeed character with the high bit set (0x8A, that's ASCII-LF with an even-parity bit set). Also, for some HEX frame types, the frame terminator may be followed by an XON (0x11) character ("transmit on" in so-called "software flow control").
 === Binary Frame ===

Trace: