URL https://opencores.org/ocsvn/cpu6502_true_cycle/cpu6502_true_cycle/trunk

Subversion Repositories cpu6502_true_cycle

[/] [cpu6502_true_cycle/] [trunk/] [doc/] [errata.txt] - Diff between revs 25 and 26

Rev 25	Rev 26
`v1.11 BETA 2013/07/24`	`v1.4 2018/09/15`
	`FUNCTIONALITY:`
	`no errata reported/opened`

	`TIMING:`
	`no errata reported/opened`

	`SIGNALING:`
	`no errata reported/opened`


	`v1.4 BETA 2013/07/24`
`FUNCTIONALITY:`	`FUNCTIONALITY:`
`- ADC and SBC in decimal mode (all op codes -`	`- ADC and SBC in decimal mode (all op codes -`
`seems to use a formula different from a real R6502.`	`seems to use a formula different from a real R6502.`

`TIMING:`	`TIMING:`
`- All Branch Instructions`	`- All Branch Instructions`
`(BCC, BCS, BEQ, BNE, BPL, BMI, BVC, BVS)`	`(BCC, BCS, BEQ, BNE, BPL, BMI, BVC, BVS)`
`4 cycles if branch forward occur and the branch`	`4 cycles if branch forward occur and the branch`
`instruction lies on a xxFEh location.`	`instruction lies on a xxFEh location.`
`Must be 3 cycles.`	`Must be 3 cycles.`

`SIGNALING:`	`SIGNALING:`
`- Hardware Interrupts NMI & IRQ - NO "SYNC"`	`- Hardware Interrupts NMI & IRQ - NO "SYNC"`
`- RESET generates NO SYNC`	`- RESET generates NO SYNC`