in Japanese

NISHIPPLE

Introduction

This is a construction kit of A*p*e II compatible logic board.

pic1
print circuit board♡
pic2
soldering♥
pic3
finished☆
pic4
6502 micro processor! there is only one slot.
pic5
junk DRAM is reused.
pic6
BASIC ROM written in a flash. You can select a ROM image from 16 images.

Circuit

Based on II Plus circuit except the followings.

The change portion of a circuit.

BASIC ROM
DRAM
joystick
oscillator
cassette input

Writing images into flash ROMs

BASIC

Place a ROM image on the address from 1000h to 3FFFh (12K bytes). Place dummy data from 0000h to 0FFFh.

If you want to use multiple ROM images, place data as the following.

DUMMY : 0000h - 0FFFh
ROM0 : 1000h - 3FFFh
DUMMY : 4000h - 4FFFh
ROM1 : 5000 - 7FFFh
DUMMY : 8000 - 8FFFh
ROM2 : 9000 - BFFFh

CHARACTER

Write data from the beginning of EN29F002T.

When you write an image using a EN29F002T Flash Memory Writer, make the total length exactly 256K bytes by adding dummy data.

Parts

silk screen print of PCB

CPU, flash ROM, DRAM
CHARACTEREN29F002T
BASICEN29F002T
DRAM1-2TMS44400DJ etc.
CPU6502
transistors and diodes
Q52SC1815
Q422SC1815
Q412SC1815
DRQ12SC1815
XQ12SC1815
Q62SC1815
BAQ12SC1815
Q32SC1815
CR11S2076 etc.
CTQ12SC1815
generic ICs
UA374LS166
UA874LS257
UA974LS151
UA1074LS194
UA1174LS74
UA1274LS02
UA13NE555
UA1474LS02
UB474LS194
UB574LS174
UB674LS257
UB774LS257
UB874LS174
UB974LS194
UB1074LS74
UB1174LS08
UB1274LS11
UB1374LS02
UB1474LS02
UB3NE555
UA274LS00
UC1174LS04
UC1274LS257
UC1374LS51
UC1474LS32
UH374LS367
UB274F86
UD1174LS161
UD1274LS161
UD1374LS161
UD1474LS161
DRU274LS244
UH274LS138
UB174LS175
UC174LS153
UC274LS195
UE1174LS153
UE1274LS153
UE1374LS153
UE1474LS283
FLU174LS09
DRU174LS08
UJ174LS257
UH174LS08
UF274LS139
UD274LS20
UF1274LS138
UF1374LS138
UF1474LS259 or 9334
UH474LS367
UH574LS367
UH131-134NE555
UH1274LS138
UH1474LS251
UH1074LS245
UJ1374LS74
LCRs
PC90.1uF
R141KΩ
R262.2MΩ
PC10.1uF
C40.1uF
C120.1uF
PC20.1uF
R2533Ω
PC100.1uF
RA021KΩ x 8 elements
RA031KΩ x 8 elements
DRR11KΩ
DRR21KΩ
R321KΩ
R311KΩ
PC30.1uF
R1212KΩ
R133.3MΩ
C150.1uF
XR210KΩ
XR110KΩ
XC1100PF
XC2100PF
XR351Ω
XC410uF EC
XC330PF Trimmer (white)
PC110.1uF
PC40.1uF
BARA11KΩ x 4 elements
PC120.1uF
R51KΩ
PC50.1uF
R274.7KΩ
PC60.1uF
C350PF Trimmer (green)
C920.1uF
C910.1uF
C380.01uF
C247PF
L127uH
PC80.1uF
C940.1uF
C930.1uF
C70.022uF
C80.022uF
C50.022uF
C60.022uF
R62.7KΩ
R82KΩ
R71.5KΩ
R11200Ω VR
R23100Ω
R20100Ω
R21100Ω
R22100Ω
R331KΩ
C110.1uF
R910Ω
R2447KΩ
R1033Ω
PC70.1uF
CTC30.1uF
CTR5100KΩ
L7short
BAR31KΩ
BAR11KΩ
PC140.1uF
PC130.1uF
BAR21KΩ
RA011KΩ x 8 elements
PC150.1uF
PC160.1uF
CTR110KΩ
CTR42KΩ
C100.1uF
CTR210KΩ
CTC20.1uF
CTR3100Ω
R18100Ω
R1912KΩ
other
XTAL14.318 MHz
BASW14 elements DIP switch
VIDEORCA Jack
CASIN3.5 mm mono jack
CASOUT3.5 mm mono jack
SLOT650 pin edge connector socket

Other parts : 1 40pin DIP socket, 2 20pin sockets, 35 16pin DIP sockets, 18 14pin DIP sockets, 6 8pin DIP sockets

pic7
Working✿

Notice

Prepare a power supply more than 5V 2A. You only need 5V when you use the board with SDISK II and Apple II Plus keyboard adapter.

pic8

About the slot, Pin 1 is back right.

When you use an auto start ROM image, it doesn't work if you turn on the power immediately after turning off the power. It is because DRAM capaciter discharge is slower. Wait for a while and turn on the power again.