Comments (3)
lydon42
commented on August 13, 2024
Confirmed second sync word does kill slot 1 recovery be flashing until before and after a known second sync word.
Powerloss before 2nd sync word will not recover, powerloss at second sync word sector after erase recovers as expected.
from mega65-core.
lydon42
commented on August 13, 2024
Essentially the flash process could look into the install flags of the installed slot 0 core. If the core has no FACTORY bit set it is an old core, and a full erase is needed. If it has the FACTORY bit set, it is a new core which was checked against double sync words and it would be save to just erase the first 64k(all 4k parameter sectors on r3)/256k(on r3a plus).
from mega65-core.
lydon42
commented on August 13, 2024
New idea needed: cores can have multiple sync words. There is no way to predict them or remove them. So we need a method for MEGAFLASH to get rid of those first.
For this bit2core saves a list of max 15 sector positions (64k granularity, so 0x00-0x7f) to 0xf0-0xff in the core header, and sets bit 6 in the install flags to inform about this list.
MEGAFLASH then can first erase those sectors, before starting the full erase.
from mega65-core.
Related Issues (20)
- MEGA65 R7 Change Request Marshalling Point HOT 4
- A few modern C64 carts not detected as C64 carts by core selector HOT 50
- MEGAFLASH: refactor low level flashing interface HOT 1
- Etherload run&continue mode
- HYPERRAM: production_test fails with release-0.96 candidate HOT 4
- Hardware math division: 5211/193 > 27 HOT 10
- CONFIGURE: MAC address typed in is not correctly mangled HOT 4
- CONFIGURE: POWER-CYCLE screen has color issue on VGA only HOT 8
- RRB sprite number count limited because of colour ram wrap-around. HOT 6
- RTS immediate mode instruction completely broken HOT 1
- rel-build: various changes and enhancements
- Direct drive audio DAC has unusual stepwise behaviors in a test case HOT 2
- Enhanced DMA Byte Munging Options HOT 2
- RRB Reverse Y-row adjust HOT 2
- Set GotoX Rowmask changes colour palette in use for rendering
- Allow connection of cellular modem to Nexys4 PSRAM
- R3/R3A Cannot boot if amplifier I2C is faulty HOT 1
- SDRAM controller intermittant problems HOT 29
- Background D020 updates late after raster interrupt? HOT 1
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