Speed Tests

Boca M144EW

by Brian Bell

Reprinted from Commodore World Issue #4

Though the results can vary widely depending on line conditions, computer type, drive type, software, and interface type, these tests should help give you an idea of what to expect when using the Boca as a host modem.

Host: C-128 w/SwiftLink-232, running Omni128 BBS
Term: Amiga 1200, JRComm 1.02
Test File: Text.txt (76,800 bytes)

Downloading at 14.4Kbps

 Protocol             V.42bis  Direct
  -------------------  -------  ------
  Ymodem-G              1386      n/a
  Ymodem-1k+pre-ack*    1385     1381
  Ymodem-1k+plain ack   1070      875

Downloading at 2400bps

 Protocol              Direct
  -------------------  --------
  Ymodem-G                 n/r
  Ymodem-1k+pre-ack*       240
  Ymodem-1k+plain ack      216
  Punter               163-170
  Xmodem Checksum          187+
  Xmodem CRC               182

*Note: pre-ack is a custom type of X or Ymodem handshake which is fast, but it cannot recover if an error occurs, similar to Ymodem-G.

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