PCRB01, PCRB8 (Epson)

Internal RAM for Epson desktop machine, PC-386P, PC-486P / SE / SR / FE / FR / FS
Baseboard.Two SIMM sockets (PCRB8) or four (PCRB01) on the board,
There is one 6-dip dip switch and 2 rotary switches.To SIMM socket
Can add Epson-spec SIMMs as a pair with the same capacity (1MB, 2MB, 4MB SIMMs
Is available).PCRB8 is itself 2 MB, PCRB01 is itself 0 MB.
When installing PCRB8 on PC-486SR / FR / FS, expansion slot of computer main unit
Three jumpers on the bottom (or below if an expansion video board is installed)
It is necessary to change the titch (J11, J12, J13).Below, each jumper switch
Before change of->-> after change setting ("1 side" is written as the central pin and "1"
Short between the two pins and the side labeled "2" means the central pin and "2"
Of the pin and the meaning of short):
J11: 2 side-> 1 side
J12: 1 side-> 2 side
J13: 1 side-> 2 side
※ With the default jumper settings, short the two pins opposite to these.

・ 6 stations dip switch SW1
1: Specify parity check
　ON = Do not check parity
　OFF = Perform parity check
2: Specify the model
　ON = Used with PC-486P / SE / SR / FE / FR / FS
　OFF = Used with PC-386P
3, 4, 5, 6: System reservation (always OFF)

· Rotary switches SW2 and SW3: Memos to which memory on the RAM board is allocated
　Specify start address of address space
　PCRB01 / PCRB8 are assigned according to the memory capacity mounted on the PC main unit.
　Specify the start address to be sent.
The following is the order of the SW2 SW3 Start Address:
0 ■ 0 ■ does not work 1 ■ 0 ■ 1000000H ~ 2 ■ 0 ■ 2000000 H ~ 3 ■ 0 ■ 3000000 H ~
0 1 1 100 000 H 1 1 1 11 000 H 2 1 1 21 000 H 2 3 1 1 31 000 H
0 ■ 2 ■ 200000H ~ 1 ■ 2 ■ 1200000 H ~ 2 ■ 2 ■ 2200000 H ~ 3 ■ 2 ■ 3200000 H ~
0 ■ 3 ■ 300000H ~ 1 ■ 3 ■ 1300000 H ~ 2 ■ 3 ■ 2300000 H ~ 3 ■ 3 ■ 3300000 H ~
0 ■ 4 ■ 400000H ~ 1 ■ 4 ■ 1400000 H ~ 2 ■ 4 ■ 2400000 H ~ 3 ■ 4 ■ 3400000 H ~
0 ■ 5 ■ 500000H ~ 1 ■ 5 ■ 1.500000 H ~ 2 ■ 5 ■ 2500000 H ~ 3 ■ 5 ■ 3500000 H ~
0 ■ 6 ■ 600000H ~ 1 ■ 6 ■ 1600000 H ~ 2 ■ 6 ■ 2600000 H ~ 3 ■ 6 ■ 3600000 H ~
0 ■ 7 ■ 700000H ~ 1 ■ 7 ■ 1700000 H ~ 2 ■ 7 ■ 2700000 H ~ 3 ■ 7 ■ 3700000 H ~
0 ■ 8 ■ 800000H ~ 1 ■ 8 ■ 1800000 H ~ 2 ■ 8 ■ 2800000 H ~ 3 ■ 8 ■ 3800000 H ~
0 ■ 9 ■ 9 00000 H ~ 1 ■ 9 ■ 19 00000 H ~ 2 ■ 9 ■ 29 00000 H ~ 3 ■ 9 ■ 39 00000 H ~
0 ■ A ■ A 00000 H ~ 1 ■ A ■ 1 A 00000 H ~ 2 ■ A ■ 2 A 00000 H ~ 3 ■ A ■ 3 A 00000 H ~
0 ■ B ■ B 00000 H ~ 1 ■ B ■ 1 B 00000 H ~ 2 ■ B ■ 2 B 00000 H ~ 3 ■ B ■ 3 B 00000 H ~
0 ■ C ■ C 00000 H ~ 1 ■ C ■ 1 C 00000 H ~ 2 ■ C ■ 2 C 00000 H ~ 3 ■ C ■ 3 C 00000 H ~
0 ■ D ■ D 00000 H ~ 1 ■ D ■ 1 D 00000 H ~ 2 ■ D ■ 2 D 00000 H ~ 3 ■ D ■ 3 D 00000 H ~
0 ■ E ■ E 00000 H ~ 1 ■ E ■ 1 E 00000 H ~ 2 ■ E ■ 2 E 00000 H ~ 3 ■ E ■ 3 E 00000 H ~
0 ■ F ■ not possible 1 ■ F ■ 1 F 00000 H ~ 2 ■ F ■ 2 F 00000 H ~ 3 ■ F ■ 3 F 00000 H ~

※ In fact, the memory obtained by subtracting the conventional memory from the main unit mounted memory
　You will set the value plus one.For example, the main unit mounted memory is 5.6MB
　Then set SW2 to 0 and SW3 to 6.This is additional RAM such as EPRB01
　Common to baseboards.