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bwack / C64-Switchless-Multi-Kernal-27C256-adapter

Kernal switcher for the C64/C64C/C128
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Problem on 250469 all kernals not switched #12

Closed danko79 closed 2 years ago

danko79 commented 2 years ago

Hi, i have a C64c mainboard short 250469 and flashed SKS64_SKETCH_fw_1.6_RGB_attiny85.hex on attiny85-20pu with TL866II programmer and have pcb short rev 1.1 with flash W27c512-45z flashed the 7 kernals plus basic, BASIC_KERNAL_EXOS_SPEEDDOS_JIFFYDOS_JAFFYDOS_DOLPHIN_SPEEDDOS.bin the problem is the multi kernal adapter switched only the last 4 kernal the others banks not switched, i can't figure out where i am wrong should 7 kernal work?

bwack commented 2 years ago

Here are the instructions from the User Guide on how to enter setup mode. Before you power on the machine, you hold restore while you power up the machine. You hold it until the led starts flashing white (after about 5 seconds). The speed of the flashes indicate configuration. see below.

Setup
After installing the firmware in the SKS64, and installing it in the computer you can enter the setup menu
by holding RESTORE while powering on the machine. Continue to hold RESTORE until the LED flashes white.
Tap RESTORE to rotate through all the four possible setups. Two flashes, short or long, can be
seen periodically. They indicate the selected setup where the first flash is the motherboard form factor, and
the second flash is related to the size of the EPROM used.
    LONG – SHORT    longboard, 4 banks
    LONG – LONG longboard, 8 banks
    SHORT – SHORT   shortboard, 3 banks
    SHORT – LONG    shortboard, 7 banks.
    LOONG       1541 mode, 2 banks.
Hold RESTORE again for 5s to store setup in the ATtiny's EEPROM, and the main program starts.
danko79 commented 2 years ago

Yes works! Many Thanks.