cpu65c02_tc - R65C02 Processor Soft Core with accurate timing
ADC & SBC: Overflow Flag wrongly computet #7
Closed fpga_is_funny opened this issue over 11 years ago
fpga_is_funny commented over 11 years ago
(Found by user)
The flag "Overflow" / "V" (Bit 6 in the Processor Status Register) is computed wrong in op codes "ADC" and "SBC". This flag was not 100% tested in my test environment in the past. Also this flag is rarely used by available software e.g for APPLE}{. The erroneous code segment lies in the block "fsm_execution_unit".
Will be corrected in the next upcoming production release as soon as possible.
fpga_is_funny closed this over 11 years ago
fpga_is_funny commented over 11 years ago
- SOLVED - The whole flag computation logic was re-written.
Other major bug fixes are included in the uploaded RELEASE CANDIDATE V1.5 RC.
Look at the header of r65c02_tc.vhd to get more details.
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