Rev |
Log message |
Author |
Age |
Path |
220 |
More revision sections added |
jshamlet |
1533d 05h |
/open8_urisc/trunk/VHDL/ |
219 |
Added revision block and corrected creation date. |
jshamlet |
1533d 05h |
/open8_urisc/trunk/VHDL/ |
218 |
Revision sections added,
vdsm8.vhd added. |
jshamlet |
1533d 05h |
/open8_urisc/trunk/VHDL/ |
217 |
Broke out the vdsm8 as a separate entity, since it is used in several places,
Even MORE code cleanup. |
jshamlet |
1533d 05h |
/open8_urisc/trunk/VHDL/ |
216 |
Fixed missing parenthesis |
jshamlet |
1533d 07h |
/open8_urisc/trunk/VHDL/ |
215 |
More code cleanup |
jshamlet |
1533d 08h |
/open8_urisc/trunk/VHDL/ |
214 |
Initial add of some older code |
jshamlet |
1537d 06h |
/open8_urisc/trunk/VHDL/ |
213 |
Code and comment cleanup |
jshamlet |
1537d 06h |
/open8_urisc/trunk/VHDL/ |
212 |
Fixed issue with rewritten epoch timer not clearing alarm on set point write. |
jshamlet |
1537d 12h |
/open8_urisc/trunk/VHDL/ |
211 |
Ok, this time with feeling. Timer should now properly reset on interval update. |
jshamlet |
1538d 10h |
/open8_urisc/trunk/VHDL/ |
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 |
1538d 12h |
/open8_urisc/trunk/VHDL/ |
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 |
1539d 01h |
/open8_urisc/trunk/VHDL/ |
208 |
Removed unnecessary package references |
jshamlet |
1539d 10h |
/open8_urisc/trunk/VHDL/ |
207 |
Added a simple 8-bit, fixed asynchronous serial interface with compile time settable bit-rate, parity enable, and parity mode generics. |
jshamlet |
1540d 03h |
/open8_urisc/trunk/VHDL/ |
206 |
Merged interrupt logic with other clocked process. |
jshamlet |
1543d 22h |
/open8_urisc/trunk/VHDL/ |
205 |
More code and comment cleanup for the new SDLC engine |
jshamlet |
1543d 22h |
/open8_urisc/trunk/VHDL/ |
204 |
Fixed more incorrect comments |
jshamlet |
1543d 23h |
/open8_urisc/trunk/VHDL/ |
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 |
1544d 05h |
/open8_urisc/trunk/VHDL/ |
202 |
Fixed receiver bug that caused false flag detection,
Split the large sdlc_serial_ctrl entity into sub-entities to make debugging easier. |
jshamlet |
1544d 06h |
/open8_urisc/trunk/VHDL/ |
201 |
Fixed comments regarding RX Checksum location |
jshamlet |
1546d 03h |
/open8_urisc/trunk/VHDL/ |
200 |
Renamed dual-port buffer to match other entities. |
jshamlet |
1546d 03h |
/open8_urisc/trunk/VHDL/ |
199 |
Added monitor ram for debugging and fixed issue with dual-port read path. |
jshamlet |
1546d 03h |
/open8_urisc/trunk/VHDL/ |
198 |
Removed debugging memory |
jshamlet |
1546d 11h |
/open8_urisc/trunk/VHDL/ |
197 |
Fixed incorrect comments |
jshamlet |
1546d 12h |
/open8_urisc/trunk/VHDL/ |
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 |
1546d 12h |
/open8_urisc/trunk/VHDL/ |
195 |
Added dual-port RAM core for SDLC interface. |
jshamlet |
1547d 07h |
/open8_urisc/trunk/VHDL/ |
194 |
Cleaned up licensing sections |
jshamlet |
1547d 07h |
/open8_urisc/trunk/VHDL/ |
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 |
1547d 08h |
/open8_urisc/trunk/VHDL/ |
192 |
Added SDLC packet engine |
jshamlet |
1547d 08h |
/open8_urisc/trunk/VHDL/ |
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 |
1547d 08h |
/open8_urisc/trunk/VHDL/ |