trendavi/ordinateur

6502 ROM for my small breadboard computer. Takes input, runs programs

Ordinateur

65C02 ROM Code for my petit project Ordinateur

For the Travelers

Interesting files you may want to see...

• kernel/via.s: This is my implementation for a PS/2 keyboard driver along with other 65C22 functionality. The keyboard clock is directly hooked up to the Non-maskable interrupt (nmi) pin on the 65C02, and the data pin is connected to bit 0 on PORTA of the 65C22. The 65C02 reads in one bit at a time.
• kernel/lcd.s Modified version of Ben Eater's LCD code.

Memory Map

Base	Top	Name	Description
0x000	0x0FF	zp	Zero Page
0x100	0x1FF	stack	Stack
0x200	0x5FFF	ram	Random Access Memory
0x1000	0x1100	key buf	Keyboard Buffer
0x6000	0x600F	via	Base address of 65c22
0xC000	0xFFFF	rom	Read Only Memory
0xFFFA (l)	0xFFFB (h)	nmi	Non-Maskable Interrupt
0xFFFC (l)	0xFFFD (h)	rst	Reset
0xFFFE (l)	0xFFFF (h)	irq/brk	Interrupt Request

ordinateur's Issues

Special Characters Such as Backspace and Enter

These keys need to be sent as something else so they don't overlap as ASCII characters. Backspace and enter show up and f and Z.