250466¶
PCB ASSY NO. 250466
Schematic Number #252278
Released in 1986
8-pin board (CN5-Video port has 8 pins)
Components’ placement¶
PCB identifier |
IC number |
IC type |
Memory location/bit |
|---|---|---|---|
U1 |
CIA 1 |
$DC00-$DCFF |
|
U2 |
CIA 2 |
$DD00-$DDFF |
|
U3 |
BASIC ROM |
$A000-$BFFF |
|
U4 |
2364 |
KERNAL ROM |
$E000-$FFFF |
U5 |
2332 |
CHARACTER ROM |
$D000-$DFFF |
U6 |
SRAM 1K x 4 |
$D800-$DBFF |
|
U7 |
CPU |
N/A |
|
U8 |
7406 |
Logic NOT (Hex Inverter) |
N/A |
U9 |
DRAM 64K x 4 |
D1 |
|
U10 |
DRAM 64K x 4 |
D3 |
|
U13 |
74LS257 |
Multiplexor |
N/A |
U14 |
74LS258 |
Multiplexor |
N/A |
U15 |
74LS139 |
Demultiplexor |
N/A |
U16 |
4066 |
Quad Bilateral Switch |
N/A |
U17 |
82S100/906114-01 |
PLA |
N/A |
U18 |
SID |
$D400-$D7FF |
|
U19 |
VIC-II |
$D000-$D3FF |
|
U20 |
LM556 |
Dual Timer |
N/A |
U25 |
74LS257 |
Multiplexor |
N/A |
U26 |
74LS373 |
8 bit 3-state Latch |
N/A |
U28 |
4066 |
Quad Bilateral Switch |
N/A |
U31 |
Oscillator |
N/A |
