[sggoc] make sure interrupts are disabled (for now)
[sggoc] timing constraint file
[test_roms] added counter rom which increments io port 0x01
updated gitignore to include sdcc garbage
[sggoc] added z80 testbench
[sggoc] handle reset in cartridge
[sggoc] switch clk_div to use non blocking assignments
[sggoc] fix ram_addr size in mmu port list
[sggoc] explicit bitlength to get rid of warning
[sggoc] explicit bitlength to get rid of warning
[sggoc] change clock speed to 10hz for now. counter test rom doesn't seem to work at lower speeds?
[sggoc] fix card_addr width
[sggoc] hookup red leds to io port 0x01