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- Readme.txt for Periscope version 5.00
-
- 1) When using the software trace buffer (TB|TR|TU), the number of
- lines used by the disassembly varies depending on the disassembly
- mode. If US mode is in effect, one line is used per instruction. If
- UA mode is in effect, two lines are used per instruction. If UB mode
- is in effect, three lines are used per instruction. You can switch
- disassembly modes as needed to control the length of the screen
- display.
-
- 2) The PSTERM program has three new options: /AK, /AV, and /T.
-
- The /AK and /AV options are used to restart PSTERM and enable the
- keyboard and video respectively. These should only be used if it is
- necessary to restart PSTERM on the alternate PC without restarting
- Periscope on the local system.
-
- The /T option is used with PSTERM to test the serial ports and null-modem
- cable. To use it, do the following:
-
- - Boot both computers with NO TSRs.
-
- - Run 'PSTERM /T' on both computers. It does not matter which
- system you run PSTERM on first. If you're using other than port one
- or the fast speed, be sure to specify the '/2:xy' option as well.
-
- - If the message "No errors detected." is on both systems, the
- serial ports and cable are OK for use with Periscope.
-
- If both computers show the message "Waiting for slave" and do not
- appear to proceed, the serial cable does not have transmit and
- receive crossed properly.
-
- Error messages include:
-
- Error 271 - Port X does not exist.
- The serial port (default 1, changable with the /2:xy option) is not
- installed in the computer.
-
- Error 272 - UART appears defective.
- The serial port failed internal diagnostic testing. Replace your
- serial port and try again.
-
- Error 273 - Cannot transmit. Cable is wired improperly.
- The serial cable does not have transmit and received crossed in both
- directions. As a result, Periscope cannot send and receive data
- properly.
-
- Error 274 - CTS stuck high. Check cable wiring and other serial port.
- One of two things can cause this problem. Either the serial cable
- does not have RTS/CTS lines crossed in both directions, or the serial
- port on the computer which did not display this message is configured
- to always report Clear To Send (CTS).
-
- Error 275 - CTS unavailable. Cable does not have RTS/CTS lines crossed.
- The serial cable does not have RTS and CTS lines crossed in both
- directions. As a result, Periscope cannot handshake properly.
-
- Error 276 - No interrupt. Check hardware configuration and TSR programs.
- The receive character interrupt did not generate. This could happen
- when there are two or more serial ports configured for the same
- address, such as two ports configured as COM1, or a a TSR program is
- using the same port or the same interrupt request line with a
- different port (or different hardware, such as a mouse).
-
- 3) If you're using SKIP21, note that the suggestion to set
- breakpoints on writes to memory from 0:500 to the beginning of your
- program applies if you are watching for memory writes only. If you
- are setting breakpoints on memory reads, you should set the upper
- address to the beginning of SKIP21, since it reads memory internal to
- itself.
-