AVR Galeb emulator
Electronic schematic
In this project, I used two AVR microcontrollers, and their roles are as follows:
ATMega1284 - emulation of 6502 processor and peripheral
ATMega644 - PAL composite video signal generation
The CY7C130 is dual-port SRAM and both microcontrollers use it as video memory.
This way picture generation does not interrupt the 6502 emulation and circuit
perfectly emulates the operation of the Galeb computer.
Finished electronic circuit
In operation
Video captured directly from composite output.
Downloads
| galeb_vdu.hex | HEX file to burn into ATMega644 microcontroller |
| galeb_cpu.hex | HEX file to burn into ATMega1284 microcontroller |
| Fuses: H=0x99 L=0xE0 |