collapseos/arch/z80/sms/blk/605

CREATE _idat
0b00000100 C, 0x80 C, ( Bit 2: Select mode 4 )
0b00000000 C, 0x81 C,
0b00001111 C, 0x82 C, ( Name table: 0x3800, *B0 must be 1* )
0b11111111 C, 0x85 C, ( Sprite table: 0x3f00 )
0b11111111 C, 0x86 C, ( sprite use tiles from 0x2000 )
0b11111111 C, 0x87 C, ( Border uses palette 0xf )
0b00000000 C, 0x88 C, ( BG X scroll )
0b00000000 C, 0x89 C, ( BG Y scroll )
0b11111111 C, 0x8a C, ( Line counter (why have this?) )
sms: WIP ! 2020-05-15 12:15:31 +10:00			`CREATE _idat`
			`0b00000100 C, 0x80 C, ( Bit 2: Select mode 4 )`
			`0b00000000 C, 0x81 C,`
sms/vdp: fix bad mirroring On the real machine, I ended up at some point getting a weird "bottom mirroring" issue. It turns out that it was because when I revamped my VDP flags in an earlier commit, I hadn't read the whole technical notes about register $02 and falsely thought that B0 was ignored. No it's not. When set, it mirrors the bottom 8 rows. 2020-11-10 06:56:25 +11:00			`0b00001111 C, 0x82 C, ( Name table: 0x3800, B0 must be 1 )`
sms: WIP ! 2020-05-15 12:15:31 +10:00			`0b11111111 C, 0x85 C, ( Sprite table: 0x3f00 )`
			`0b11111111 C, 0x86 C, ( sprite use tiles from 0x2000 )`
			`0b11111111 C, 0x87 C, ( Border uses palette 0xf )`
			`0b00000000 C, 0x88 C, ( BG X scroll )`
			`0b00000000 C, 0x89 C, ( BG Y scroll )`
			`0b11111111 C, 0x8a C, ( Line counter (why have this?) )`