Apple][+ Hardware

Baffa-6502 Homebrew Computer is another series of Baffa-2 computers that use MOS6502 CPU in their designs.

Default Features:

CPU: 6502 running at 1.023Mhz
RAM: 48K Bytes
ROM: 12K Bytes
Video ROM: 2K Bytes
Video Modes: text mode (40 and 80 Columns), GR, HGR, HGR2

More info about...

Baffa-6502 PCBs

Apple][+ Kit

Apple][+ Setup

Backplane Bus Pin Assignments for this project

Pin	Signal	Pin	Signal
1	A0	31	D4
2	A1	32	D5
3	A2	33	D6
4	A3	34	D7
5	A4	35	TX
6	A5	36	RX
7	A6	37	!NMI
8	A7	38	!RESET
9	A8	39	GND
10	A9	40	VCC
11	A10	41	!DEV_SEL_SLOT_0
12	A11	42	!DEV_SEL_SLOT_1
13	A12	43	!DEV_SEL_SLOT_2
14	A13	44	!DEV_SEL_SLOT_3
15	A14	45	!DEV_SEL_SLOT_4
16	A15	46	!DEV_SEL_SLOT_5
17	!INH	47	!DEV_SEL_SLOT_6
18	7M	48	!DEV_SEL_SLOT_7
19	PHI2o	49	H12-15
20	PHI1o	50	!I/O_SEL_SLOT_1
21	CLK	51	!I/O_SEL_SLOT_2
22	!IRQ	52	!I/O_SEL_SLOT_3
23	!DMA	53	!I/O_SEL_SLOT_4
24	R/W	54	!I/O_SEL_SLOT_5
25	RDY	55	!I/O_SEL_SLOT_6
26	SYNC	56	!I/O_SEL_SLOT_7
27	D0	57	!I/O_STB
28	D1	58	Q3
29	D2	59	USER1
30	D3	60	COLOR_REF

Baffa-6502 Boards - Apple][+ Compatible Computer

This setup implements the logic for the Apple][+

More info about Baffa-6502 Apple][+ clone project

Full Backplane Rev.4

6502 CPU Rev.1 Buffered

6502 CPU Rev.2 Buffered

Address Decoder Board

I/O Board Rev.0

Video Board (40/80 Columns mode)

Clock Board Rev.0

Printer Board (Grappler+)

Saturn 128K Board

Super Serial Board

Softcard

Mocking Board

Original Schematic Reference

Original AppleII+ Schematic

Original DiskII Interface

Original Grappler+ Schematic

Original Saturn 128K Schematic

Original Super Serial Schematic

Original Softcard Schematic

Mockingboard by Bill Garber

Atari Joystick by Lukazi*

Joystick Pinout

*Atari Joystick by Lukazi from AppleII Projects Blog.