Sega Mega-CD - Error Message List

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ERROR

MESSAGE

LIST

*

MEGA-CD

INTERFACE

PART

1.

BOOT

ROM

READ

ERROR

The

read

of

the

boot

ROM

(IC4)

is

not

done

normally.

2.

SUB-CPU RESET

ERROR

The

SUB-CPU

(IC1)

is

not

reset.

3.

PROGRAM

RAM

R/W

ERROR

The

R/W

of

the

program

RAM

(IC5

to

8)

is

not

done

normally.

4.

BIOS TRANSFER

ERROR

The

R/W

of

the

program

RAM

(IC5

TO

8)

is

not

done

normally

or

the

read

of

the

boot

ROM

(IC4)

is

not

done

normally.

5.

SYSTEM

TRANSFER

ERROR

The

R/W

of

the

program

RAM

(IC5

to

8)

is

not

done

normally

or

the

read

of

the

ROM(

of

Mega

Drive

side

)

of

the

check

cartridge

is

not

done

normally.

6.

SUB-CPU RELEASE RESET

ERROR

The

SUB-CPU

(IC1)

reset

cannot

be

canceled.

7.

SUB-CPU

NOT

READY

The

SUB-CPU

(Icl)

does

not

function

normally.

* CD-INTERFACE

PART

The

followings

are

the

functions

of

the

circuit

in

G/A

(IC2).

8.

COMMUNICATION

FLAGS

R/W

ERROR

The

R/W

of

the

communication

port

is

not

done

normally

9.

COMMUNICATION

PORT

R/W

ERROR

The

R/W

of

the

communication

port

is

not

done

normally.

10.

STOPWATCH

MAX.

TIME

ERROR

The

stopwatch

time

has

exceeded

the

upper

limit

value.

11.

STOPWATCH

MIN. TIME

ERROR

The

stopwatch

time

is

less

than

the

lower

limit

value.

*

WORD

RAM

PART

(ICll,

IC12)

12.

WORD

RAM

MODE

ERROR

The

mode

of

the

word

RAM

is

not

switched.

5