Apple II

Discrete TTL video, no custom chips.

Chips

Chip	Where	Role
6502 / 65C02 CPU		CPU
4116 DRAM 16K x 1		Dynamic RAM, 16K x 1 (lower 16K on the Spectrum)
9316B / 2316B ROM 2K x 8		2K x 8 mask ROM: Apple II monitor and BASIC ROMs; TRS-80 ROM C and character generator
2513 character generator ROM (64 x 8 x 5)	A5 (Apple II Reference Manual, p. 96); the photographed board has a General Instrument RO-3-2513/CGR-001	Character generator: the 64 upper-case 5 x 7 dot patterns for 40-column text
MM5740 Keyboard Encoder	Keyboard PCB	Keyboard encoder (early II and II+)

Power supply to main board, 6-pin AMP 9-35028-1 header (supply cable plugs in)
Game I/O (16-pin DIP socket, J14), 16-pin DIP socket
Peripheral slots 0-7 (50-pin edge), 50-pin card edge, 0.10 in pitch (Winchester 2HW25C0-111)
Video out (RCA), RCA phono jack
Auxiliary video connector (4-pin), Molex KK100, 4 square pins on 0.10 in
Cassette IN, 3.5 mm mono jack
Cassette OUT, 3.5 mm mono jack
Keyboard connector (16-pin DIP socket), 16-pin DIP socket
Speaker connector (2-pin), Molex KK100, 2 square pins on 0.10 in

Rail	Expect	Measure at
+5 V	4.85-5.15 V (Red Book p. 111)	6502 pin 8; 9316B pin 24; ii-psu pin 3 (PSU connector); ii-slot pin 25
+12 V	11.3-12.3 V (Red Book p. 111)	4116 pin 8; ii-psu pin 4 (PSU connector); ii-slot pin 50
-5 V	-4.7 to -5.7 V (Red Book p. 111)	4116 pin 1; ii-psu pin 6 (PSU connector); ii-slot pin 34
-12 V	-11 to -13 V (Red Book p. 111)	ii-psu pin 5 (PSU connector); ii-slot pin 33; MM5740 pin 18