| Rev |
Log message |
Author |
Age |
Path |
| 299 |
Modified the status_led.vhd to slow down the DIM50PCT signal to 1/32 instead of 1/2 for use with shift-register based discrete LEDs and added the ability to chain the toggle signal to save on resources as well as synchronize the "toggling" |
jshamlet |
667d 11h |
/open8_urisc/trunk/VHDL/ |
| 298 |
Fixed a long-standing bug in the SBC instruction where the 1 wasn't being added to complete the 2's complement of Rn. This was causing off-by-one errors in subtraction and negating carry only subtractions. |
jshamlet |
668d 14h |
/open8_urisc/trunk/VHDL/ |
| 297 |
Fixed register map comments |
jshamlet |
958d 22h |
/open8_urisc/trunk/VHDL/ |
| 296 |
Removed parallel interface from o8_vector_rx.vhd, modified vector_tx.vhd to use a generic for it's seed value, slight formatting change on o8_elapsed_usec.vhd. |
jshamlet |
967d 13h |
/open8_urisc/trunk/VHDL/ |
| 295 |
Undoing previous revision. UART was fine, bug reporter was not. |
jshamlet |
970d 17h |
/open8_urisc/trunk/VHDL/ |
| 294 |
Fixed an ancient bug in the parity logic that had the parity inverted. |
jshamlet |
970d 22h |
/open8_urisc/trunk/VHDL/ |
| 293 |
Fixed formatting issue in o8_sync_serial where tabs were inserted instead of spaces and fixed column spacing as a result (purely cosmetic) |
jshamlet |
989d 22h |
/open8_urisc/trunk/VHDL/ |
| 292 |
Updated the o8_trig_delay entity by:
1) Added a global interrupt enable,
2) Added the ability to trigger on both the pre- and post-arm trigger input
3) Added the ability to read the external input on offset 7 |
jshamlet |
1060d 21h |
/open8_urisc/trunk/VHDL/ |
| 290 |
Added an additional generic "Rotation_Ignores_Carry" that removes the carry logic from the ROL/ROR instructions such that they now rotate 'normally',
Added an alias for PSR_GP4 named PSR_S, as it is now used to switch the function of the RSP instruction. The internal opcode hasn't changed, but it allows assembly code to use PSR_S or BRS/BNS when performing RSP related operations. |
jshamlet |
1103d 11h |
/open8_urisc/trunk/VHDL/ |
| 289 |
Added back the delay for the cursor home command, since it is slow on most Hitachi compatible LCD panels. |
jshamlet |
1120d 22h |
/open8_urisc/trunk/VHDL/ |
| 288 |
Removed hard-wired R/Wn output and replaced it with a note that the R/Wn line must be tied low either in firmware or on the board. |
jshamlet |
1121d 18h |
/open8_urisc/trunk/VHDL/ |
| 287 |
Fixed mangled comments and revisioning dates. |
jshamlet |
1122d 18h |
/open8_urisc/trunk/VHDL/ |
| 286 |
Added initial cut of a "universal" character LCD driver. Allows for adjustment of address setup, enable high, and cycle times. Also has built-in timers for handling timing on certain commands. |
jshamlet |
1122d 18h |
/open8_urisc/trunk/VHDL/ |
| 285 |
Added checksum byte to vector tx/rx to avoid issues with serial line noise glitching the receiver. Also modified the transmitted to take any generic argument, rather than canned arguments. |
jshamlet |
1129d 21h |
/open8_urisc/trunk/VHDL/ |
| 284 |
Corrected the vhdl unit name and description for o8_7seg.vhd |
jshamlet |
1243d 08h |
/open8_urisc/trunk/VHDL/ |
| 283 |
Altered SDLC bitclock check on TX to NOT block when tested by software, but to instead ignore packet write requests if BClk_Okay is low. This allows software to continue checking BClk_Okay in a polling loop. |
jshamlet |
1246d 20h |
/open8_urisc/trunk/VHDL/ |
| 282 |
Modified the SDLC core transmit states to have consistent naming. |
jshamlet |
1246d 20h |
/open8_urisc/trunk/VHDL/ |
| 281 |
Added pre-initialization to the dual-port RAM signals. |
jshamlet |
1246d 23h |
/open8_urisc/trunk/VHDL/ |
| 280 |
Got rid of silly aliases that connected the dual-port memory and the arbitration logic. |
jshamlet |
1246d 23h |
/open8_urisc/trunk/VHDL/ |
| 279 |
More comment cleanup |
jshamlet |
1247d 20h |
/open8_urisc/trunk/VHDL/ |
| 278 |
Flattened the SDLC interface to fewer files and eliminated the package file. |
jshamlet |
1248d 14h |
/open8_urisc/trunk/VHDL/ |
| 276 |
More comment fixes |
jshamlet |
1283d 17h |
/open8_urisc/trunk/VHDL/ |
| 275 |
Fixed a minor comment error. |
jshamlet |
1285d 11h |
/open8_urisc/trunk/VHDL/ |
| 274 |
Updated comments with more corrections |
jshamlet |
1285d 18h |
/open8_urisc/trunk/VHDL/ |
| 273 |
Updated comments with corrections |
jshamlet |
1285d 20h |
/open8_urisc/trunk/VHDL/ |
| 271 |
Removed deleted generic define. |
jshamlet |
1295d 19h |
/open8_urisc/trunk/VHDL/ |
| 270 |
Moved CPU internal constants to o8_cpu.vhd and replace the generic that set the RSP direction flag with a constant instead. This removes the need to expose internal architectural flags externally.
Also added a hard-coded version register that takes a major and minor value as bytes using generics. This is a read-only register to the CPU. |
jshamlet |
1295d 19h |
/open8_urisc/trunk/VHDL/ |
| 269 |
Modified the write data path to use separate enumerated states rather than reuse the .reg field to improve performance. |
jshamlet |
1298d 09h |
/open8_urisc/trunk/VHDL/ |
| 268 |
Added a 16-input external interrupt manager and dedicated SPI tx-only transmitter (for use with DACs, etc.). Also updated the soft-DACs with cleaned up HDL. |
jshamlet |
1298d 09h |
/open8_urisc/trunk/VHDL/ |
| 267 |
Corrected the file description to indicate this is an example package. |
jshamlet |
1298d 09h |
/open8_urisc/trunk/VHDL/ |
