// Resources describing the C64 reset sequence:
// https://www.c64-wiki.com/wiki/Reset_(Process)


reset_entry:
	// The GPL program at https://github.com/Klaus2m5/6502_65C02_functional_tests/blob/master/6502_functional_test.a65
	// uses the following initial reset sequence
	// affirmed by c64 PRG p269
	cld
	ldx #$ff
	txs
	sei

	// The following routine is based on reading the public KERNAL jumptable routine
	// list, and making unimaginative assumptions about what should be done on reset.
	// Also, https://codebase64.org/doku.php?id=base:assembling_your_own_cart_rom_image was used
	// as it shows example startup sequence, to be followe by cartridge creators

	// C64 PRG p269
	jsr cartridge_check
	bcc !+
	jmp (ICART_COLD_START)
!:
	// Initialising IO is obviously required. Also indicated by c64 prg p269.
	jsr JIOINIT
	
	// Setting up the screen and testing ram is obviously required
	// also affirmed by p269 of c64 prg
	jsr JRAMTAS // called RANTAM on Codebase64 wiki
	
	// Resetting IO vectors is obviously required, if we want interrupts to run
	// also affirmed by c64 prg p269
	jsr JRESTOR

	//  "Compute's Mapping the 64" p236
	jsr JCINT

	// What do we do when finished?  A C64 jumps into the BASIC ROM
	cli 			// Allow interrupts to happen

	// c64 prg p269
	jmp (IBASIC_COLD_START)