Difference between revisions of "Debug device"
From MSX Game Library
| Line 4: | Line 4: | ||
== Improved debug device protocol == | == Improved debug device protocol == | ||
| − | + | ----------------------------------------------------------------------------- | |
| − | ----------------------------------------------------------------------------- | + | Port 0x2E - Mode Set Register |
| − | + | ----------------------------------------------------------------------------- | |
| − | ----------------------------------------------------------------------------- | ||
7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 | ||
│ │ │ │ └───┴───┴───┴── Mode-specific parameters | │ │ │ │ └───┴───┴───┴── Mode-specific parameters | ||
│ │ └───┴────────────────── Output mode (0 = OFF, 1 = single byte, 2 = multi byte) | │ │ └───┴────────────────── Output mode (0 = OFF, 1 = single byte, 2 = multi byte) | ||
│ └────────────────────────── Line feed mode (0 = line feed at mode change, 1 = no line feed) | │ └────────────────────────── Line feed mode (0 = line feed at mode change, 1 = no line feed) | ||
| − | └────────────────────────────── Functionality (0 = output, 1 = command) | + | └────────────────────────────── <b>Functionality (0 = output, 1 = command)</b> |
| − | + | ||
| − | ----------------------------------------------------------------------------- | + | ----------------------------------------------------------------------------- |
| − | + | Functionality = output, Output mode = single byte | |
| − | ----------------------------------------------------------------------------- | + | ----------------------------------------------------------------------------- |
7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 | ||
│ │ │ │ │ │ │ └── Hexadecimal mode (0 = OFF, 1 = ON) | │ │ │ │ │ │ │ └── Hexadecimal mode (0 = OFF, 1 = ON) | ||
| Line 22: | Line 21: | ||
│ │ │ │ │ └────────── Decimal mode (0 = OFF, 1 = ON) | │ │ │ │ │ └────────── Decimal mode (0 = OFF, 1 = ON) | ||
: : : : └────────────── ASCII mode (0 = OFF, 1 = ON) | : : : : └────────────── ASCII mode (0 = OFF, 1 = ON) | ||
| − | + | ||
| − | ----------------------------------------------------------------------------- | + | ----------------------------------------------------------------------------- |
| − | + | Functionality = output, Output mode = multi byte | |
| − | ----------------------------------------------------------------------------- | + | ----------------------------------------------------------------------------- |
7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 | ||
│ │ │ │ │ │ └───┴── Mode (0 = hex, 1 = binary, 2 = decimal, 3 = ASCII mode) | │ │ │ │ │ │ └───┴── Mode (0 = hex, 1 = binary, 2 = decimal, 3 = ASCII mode) | ||
| − | │ │ │ │ │ └────────── Data width (0 = 8 bits; 1 = 16 bits) | + | │ │ │ │ │ └────────── <b>Data width (0 = 8 bits; 1 = 16 bits)</b> |
| − | : : : : └────────────── Signed (0 = unsigned, 1 = signed) | + | : : : : └────────────── <b>Signed (0 = unsigned, 1 = signed)</b> |
| − | + | ||
| − | ----------------------------------------------------------------------------- | + | ----------------------------------------------------------------------------- |
| − | + | Functionality = command | |
| − | ----------------------------------------------------------------------------- | + | ----------------------------------------------------------------------------- |
7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 | ||
| − | : └───┴───┴───┴───┴───┴───┴── Command ID (0x7F = break point) | + | : └───┴───┴───┴───┴───┴───┴── <b>Command ID (0x7F = break point)</b> |
| − | </ | + | </tt> |
[[category:Proposal]] | [[category:Proposal]] | ||
Revision as of 18:39, 27 July 2023
Proposal to improve the debugging protocol used by openMSX pseudo-device.
Based on: https://openmsx.org/manual/user.html#debugdevice
Improved debug device protocol
----------------------------------------------------------------------------- Port 0x2E - Mode Set Register ----------------------------------------------------------------------------- 7 6 5 4 3 2 1 0 │ │ │ │ └───┴───┴───┴── Mode-specific parameters │ │ └───┴────────────────── Output mode (0 = OFF, 1 = single byte, 2 = multi byte) │ └────────────────────────── Line feed mode (0 = line feed at mode change, 1 = no line feed) └────────────────────────────── Functionality (0 = output, 1 = command) ----------------------------------------------------------------------------- Functionality = output, Output mode = single byte ----------------------------------------------------------------------------- 7 6 5 4 3 2 1 0 │ │ │ │ │ │ │ └── Hexadecimal mode (0 = OFF, 1 = ON) │ │ │ │ │ │ └────── Binary mode (0 = OFF, 1 = ON) │ │ │ │ │ └────────── Decimal mode (0 = OFF, 1 = ON) : : : : └────────────── ASCII mode (0 = OFF, 1 = ON) ----------------------------------------------------------------------------- Functionality = output, Output mode = multi byte ----------------------------------------------------------------------------- 7 6 5 4 3 2 1 0 │ │ │ │ │ │ └───┴── Mode (0 = hex, 1 = binary, 2 = decimal, 3 = ASCII mode) │ │ │ │ │ └────────── Data width (0 = 8 bits; 1 = 16 bits) : : : : └────────────── Signed (0 = unsigned, 1 = signed) ----------------------------------------------------------------------------- Functionality = command ----------------------------------------------------------------------------- 7 6 5 4 3 2 1 0 : └───┴───┴───┴───┴───┴───┴── Command ID (0x7F = break point)
</tt>