MSX2 does not boot from internal floppy

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By Eugeny_Brychkov

Paragon (1232)

Аватар пользователя Eugeny_Brychkov

18-04-2009, 18:36

Hi guys,
I have JU-253 (Matsushita/Panasonic). Connect it to internal floppy bus. Connect power. On power-on sequence floppy is being polled (motor starts), but machine does not boot. When machine goes BASIC, "files" displays contents correctly. If connecting external FD-051 machine boots ok. What is a problem with internal drive/bus/config? Any ideas?
Thanks in advance!
E.

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By cax

Prophet (3740)

Аватар пользователя cax

18-04-2009, 19:21

It may be ID jumper should be set on the drive.
Try to ask in this thread too.

By Eugeny_Brychkov

Paragon (1232)

Аватар пользователя Eugeny_Brychkov

18-04-2009, 19:28

Have tro jumpers. Tried them in different combinations. No luck. Drive works as A:, but machine does not boot!

By Jipe

Paragon (1594)

Аватар пользователя Jipe

18-04-2009, 19:37

config for JU-253

on board search R65 66 67 resistor

..... ORG MSX

R67 o o ===

R65 === o o

R66 o o ===

By Eugeny_Brychkov

Paragon (1232)

Аватар пользователя Eugeny_Brychkov

18-04-2009, 21:46

These are actually not resistors, they are bridges. R66 - present, R65 - absent, R67 - present. Is it what you are talking about?

By dhau

Paragon (1570)

Аватар пользователя dhau

18-04-2009, 22:11

As long as file i/o commands from basic work, floppy is ok. Does your computer have 64K RAM? Does your floppy disk have MSX-DOS MBR? IBM PC MS-DOS MBR doesn't work on MSX.

By Eugeny_Brychkov

Paragon (1232)

Аватар пользователя Eugeny_Brychkov

18-04-2009, 22:21

YIS805/128
With external disk drive plugged into expansion slot machine boots ok, so floppy disk is ok.

By Jipe

Paragon (1594)

Аватар пользователя Jipe

18-04-2009, 22:22

origin is not bridge is CMS component but is the same thing

yes is R66 present R65 absent R67 present

work fine in my 8280 and second drive to my Turbo-R GT

By Eugeny_Brychkov

Paragon (1232)

Аватар пользователя Eugeny_Brychkov

18-04-2009, 22:26

For me works fine, but DOES NOT BOOT MSX-DOS during startup! Just goes directly to BASIC!

By Jipe

Paragon (1594)

Аватар пользователя Jipe

18-04-2009, 23:07

try a disk with 360k format for see
exist many version of DOS1 try another

By Eugeny_Brychkov

Paragon (1232)

Аватар пользователя Eugeny_Brychkov

18-04-2009, 23:11

I will, but it will not help. FDD does not even start accessing disk. When it does, you usually hear specific sound of moving heads, and if it can read but with errors, it may say "boot error" or something likie this.
In my case machine does not even try booting from internal drive. Why?

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