| Rev |
Log message |
Author |
Age |
Path |
| 217 |
Broke out the vdsm8 as a separate entity, since it is used in several places,
Even MORE code cleanup. |
jshamlet |
1535d 10h |
/open8_urisc/trunk/ |
| 216 |
Fixed missing parenthesis |
jshamlet |
1535d 12h |
/open8_urisc/trunk/ |
| 215 |
More code cleanup |
jshamlet |
1535d 12h |
/open8_urisc/trunk/ |
| 214 |
Initial add of some older code |
jshamlet |
1539d 10h |
/open8_urisc/trunk/ |
| 213 |
Code and comment cleanup |
jshamlet |
1539d 11h |
/open8_urisc/trunk/ |
| 212 |
Fixed issue with rewritten epoch timer not clearing alarm on set point write. |
jshamlet |
1539d 17h |
/open8_urisc/trunk/ |
| 211 |
Ok, this time with feeling. Timer should now properly reset on interval update. |
jshamlet |
1540d 14h |
/open8_urisc/trunk/ |
| 210 |
Modified the timers to reset on new interval write. This avoids an issue in the original design where the timer had to reach zero before updating, potentially causing unwanted interrupts.
Also added a flag to the CPU to allow interrupts to be processed sequentially based on the state of the I bit. This one is set to false by default, as it is a significant change in interrupt behavior. Long, and reentrant, ISRs can clear the I bit prematurely to allow themselves to be interrupted.
Lastly, added the I bit to the exported flags for possible use in memory protection schemes. |
jshamlet |
1540d 17h |
/open8_urisc/trunk/ |
| 209 |
Fixed an issue in the PIT timer that caused an immediate interrupt on interval write,
Fixed an issue in the epoch timer that resulted in a spurious interrupt due to extra LSB's being set by default in the set point register,
While cleaning elsewhere, founding a spacing issue in the CPU HDL,
Added a 4k ROM and MW core. |
jshamlet |
1541d 05h |
/open8_urisc/trunk/ |
| 208 |
Removed unnecessary package references |
jshamlet |
1541d 15h |
/open8_urisc/trunk/ |
| 207 |
Added a simple 8-bit, fixed asynchronous serial interface with compile time settable bit-rate, parity enable, and parity mode generics. |
jshamlet |
1542d 08h |
/open8_urisc/trunk/ |
| 206 |
Merged interrupt logic with other clocked process. |
jshamlet |
1546d 03h |
/open8_urisc/trunk/ |
| 205 |
More code and comment cleanup for the new SDLC engine |
jshamlet |
1546d 03h |
/open8_urisc/trunk/ |
| 204 |
Fixed more incorrect comments |
jshamlet |
1546d 03h |
/open8_urisc/trunk/ |
| 203 |
Removed an extra delay FF from the bitclock rising edge signal for the clock slave configuration to better center the rising edge pulse on the receive signal. |
jshamlet |
1546d 09h |
/open8_urisc/trunk/ |
| 202 |
Fixed receiver bug that caused false flag detection,
Split the large sdlc_serial_ctrl entity into sub-entities to make debugging easier. |
jshamlet |
1546d 10h |
/open8_urisc/trunk/ |
| 201 |
Fixed comments regarding RX Checksum location |
jshamlet |
1548d 07h |
/open8_urisc/trunk/ |
| 200 |
Renamed dual-port buffer to match other entities. |
jshamlet |
1548d 08h |
/open8_urisc/trunk/ |
| 199 |
Added monitor ram for debugging and fixed issue with dual-port read path. |
jshamlet |
1548d 08h |
/open8_urisc/trunk/ |
| 198 |
Removed debugging memory |
jshamlet |
1548d 16h |
/open8_urisc/trunk/ |
| 197 |
Fixed incorrect comments |
jshamlet |
1548d 16h |
/open8_urisc/trunk/ |
| 196 |
Modified the update logic to allow direct writes to offset 0xFE for refreshing the clock status. This way, any write to the clock status register will immediately be undone. (Writing 0x00 to offset 0xFF is once-more ignored) |
jshamlet |
1548d 17h |
/open8_urisc/trunk/ |
| 195 |
Added dual-port RAM core for SDLC interface. |
jshamlet |
1549d 11h |
/open8_urisc/trunk/ |
| 194 |
Cleaned up licensing sections |
jshamlet |
1549d 11h |
/open8_urisc/trunk/ |
| 193 |
Fixed incorrect comment in o8_alu16.vhd. The value of the write to 0x1F doesn't matter, as the write itself triggers the calculation. |
jshamlet |
1549d 12h |
/open8_urisc/trunk/ |
| 192 |
Added SDLC packet engine |
jshamlet |
1549d 12h |
/open8_urisc/trunk/ |
| 191 |
Cleaned up comments, added back the OPEN8_NULLBUS constant, and added some new modules for ADCs and LCD displays.
Also made the button input module more configurable by moving the debounce code to a separate entity and using generics to instantiate it. |
jshamlet |
1549d 12h |
/open8_urisc/trunk/ |
| 190 |
Fixed a bug in CPU where RTI/RTS wasn't idling the instruction cache, causing intermittent failures where RTI would execute as RTS, corrupting the stack;
Fixed a bug in the real-time clock where the uSec tick generator would stop if the PIT timer value was left/set to 0x00. |
jshamlet |
1561d 10h |
/open8_urisc/trunk/ |
| 189 |
Merged changes from private repository,
added ceil_log2 function to Open8_pkg, since it is used to calculate RAM vectors,
cleaned up comments and removed local copies of the ceil_log2 function from peripherals. |
jshamlet |
1562d 10h |
/open8_urisc/trunk/ |
| 188 |
Added a generic to alter the behavior of RTI so that it can optionally skip restoring the general purpose flags GP4 to GP7, allowing ISR's to make persistent changes to them. Also exported these flags to the top level for use outside the CPU. |
jshamlet |
1562d 13h |
/open8_urisc/trunk/ |
