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[/] [open8_urisc] - Rev 280

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Rev Log message Author Age Path
280 Got rid of silly aliases that connected the dual-port memory and the arbitration logic. jshamlet 1324d 10h /open8_urisc
279 More comment cleanup jshamlet 1325d 07h /open8_urisc
278 Flattened the SDLC interface to fewer files and eliminated the package file. jshamlet 1326d 01h /open8_urisc
277 Fixed documentation errors related to flags. The UPP ALU instruction only alters the C flag, not the Z or N flags. This implies that using indexed loads or stores with auto post-increment will potentially alter the C flag. jshamlet 1326d 07h /open8_urisc
276 More comment fixes jshamlet 1361d 04h /open8_urisc
275 Fixed a minor comment error. jshamlet 1362d 22h /open8_urisc
274 Updated comments with more corrections jshamlet 1363d 05h /open8_urisc
273 Updated comments with corrections jshamlet 1363d 07h /open8_urisc
272 Updated the HTML documentation to reflect the removed generic. jshamlet 1373d 06h /open8_urisc
271 Removed deleted generic define. jshamlet 1373d 06h /open8_urisc
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 1373d 06h /open8_urisc
269 Modified the write data path to use separate enumerated states rather than reuse the .reg field to improve performance. jshamlet 1375d 20h /open8_urisc
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 1375d 20h /open8_urisc
267 Corrected the file description to indicate this is an example package. jshamlet 1375d 20h /open8_urisc
266 Accidentally uploaded incorrect example file for Open8_cfg.vhd jshamlet 1375d 20h /open8_urisc
265 Fixed a bug where "reg" wasn't being initialized with Poly_Init at reset. jshamlet 1468d 05h /open8_urisc
264 Updated comments jshamlet 1478d 02h /open8_urisc
263 Fixed a very old bug in the CPU core where autoincrements weren't affecting the upper register in the pair, causing it to loop around the lower 256 bytes. This only affected LDX/LDO, as the proper ALU signals were being generated in STO/STX and UPP. Wow, that bug has been in there for AGES.

Also separated the SDLC TX and RX interrupts so that they could be handled separately.		 jshamlet 1478d 03h /open8_urisc
262 Added comments to LCD controllers - specifically that reading either register 0 or 1 will return the ready status. This code was already present, but not mentioned in the register map. jshamlet 1487d 06h /open8_urisc
261 Increased delay timer to 7 bits for button press detection. jshamlet 1494d 06h /open8_urisc

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