Mike
There are places for two ROMS. In the regular PC-8300 there is only one
ROM used for Basic.
83100 - 438
N83A Basic
1986
Microsoft
8649 - Z69
In the other unit, which no longer has it's regular ROM, there are two ROMs
D276256D-20
D276256G-25
I hope this helps. On the PC-8300 there is a wide access on the back
with three screws. Only two ROM sockets are visible and usable without
dismantling the case.
I hope this helps.
Fred Whitaker
On 2/17/2017 2:15 PM, Mike Stein wrote:
Looks like it's up to you, Fred:
Can you open up the 8300 and tell us exactly how many and what kind of ROMs or
EPROMs are in there, i.e. any labels and/or part numbers?
Since at least one is custom firmware it's probably in an EPROM (as opposed to
a ROM) and will probably have a standard number like 27C512.
From what I've read it looks like there should be three 28-pin sockets with a
27C512 in two of them and the third one empty or with an Option ROM in it.
Let me know what you find.
m
----- Original Message -----
From: "Fred Whitaker" <[email protected]>
To: "Model 100 Discussion" <[email protected]>
Sent: Sunday, February 12, 2017 3:32 PM
Subject: Re: [M100] Parts for an NEC PC-8300
Mike
I don't have an image. I don't know if the ROM you are referring to will
do the job. The 8300 ROM is bigger than the 8201, but I believe it uses
the same chip as the 8201.
I was under the impression that someone had uploaded a copy of the 8300
ROM contents, but I don't remember where or when.
I could send you one of my ROMs, from another machine, but I don't know
if that would help.
Fred Whitaker
On 2/11/2017 7:48 PM, Mike Stein wrote:
Hi Frederick,
If you can send me or point me to an image of that ROM I can probably burn an
EPROM for you, assuming it's a JEDEC-standard 27xxx type.
m
----- Original Message -----
From: "Frederick Whitaker" <[email protected]>
To: "Model 100 Discussion" <[email protected]>
Sent: Saturday, February 11, 2017 6:27 PM
Subject: [M100] Parts for an NEC PC-8300
I am interested in a replacement keyboard for my NEC PC-8300. I also
need a new Main ROM, When I received this machine it had a specialized
ROM in it. It will not boot.
If I had those two items I could use this machine. I have asked in the
past if anyone could make a main ROM for this machine but never received
an answer.
Fred Whitaker
