I've been thinking about a 2MB RAM option ROM replacement, which would yield 64
pages of either RAM images or paged file space; I suppose I could add an
alternate system ROM while I'm at it ;-)
m
----- Original Message -----
From: Stephen Adolph
To: m...@bitchin100.com
Sent: Monday, March 25, 2019 8:06 PM
Subject: Re: [M100] REX: Downloading OPTROM images
Peter did you worry about power up flip flop state?
If So what is the circuit you used? Thx.
On Monday, March 25, 2019, Peter Noeth <petern0...@gmail.com> wrote:
Steven,
The Dual ROM/ 128k RAM Memory system is of my own design. Basically the
standard ROM / RAM was removed and replaced with a new daughter board. It
allows selecting RAM in 32k banks (4) and system ROM by using the BASIC OUT x,y
statement. I had this in my T102 for about 2 years before I got the REX.
Other than the REX's mode of identifying the current OPTROM image by over
writing the Microsoft copyright on the main Menu (I use this space to identify
which ROM I am using), it works just fine. The second ROM contained changes for
the character generator to better match my Sekio printer. Plus they both
contained the Y2K date fix and they both contain the RAM bank switch code.
Also LaddieAlpha is what I used to download the Polar Systems ROM II /
Cleuseau image to REX. It worked correctly on a WinXP system.
I am still studying the TS-DOS / TPDD interface, now that I have it. I
wrote my own file transfer system decades ago, so will see if I want to use the
TPDD interface from now on.
Regards,
Peter
< snip >
Message: 12
Date: Mon, 25 Mar 2019 06:14:55 -0400
From: Stephen Adolph <twospru...@gmail.com>
To: m...@bitchin100.com
Subject: Re: [M100] REX: Downloading OPTROM images
Message-ID:
<CAMCMnV4=yLtTE2XeTCMJmpozh7iNO64PKhY+=hcsd1rcbw7...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
what dual rom 128k ram memory system? very interesting! I'm interested to
learn more. might be a conflict however with REX, depending on the
details...
On Sun, Mar 24, 2019 at 10:39 PM Peter Noeth <petern0...@gmail.com> wrote:
> Group,
>
> I purchased a REX at Tandy Assembly 2018, but am just now getting around
> to testing it with my T102 Dual ROM/128KB RAM Memory System.
>
> The REX Wiki instructions tell of needing a TPDD PC emulator (I have no
> TPDD device) but it does not indicate what program to use, or where to
> download it. I believe that either LaddieCon or LaddieAlpha is what I
need.
> But after searching for them, I found a download link on the LaddieCon
Wiki
> (on http://bitchin100.com/wiki/index.php?title=LaddieCon) that when the
> programs download, the Win7 Smart Screen Filter reports them as unsafe.
>
> Is this the correct place to download the files? If so, are they really
> unsafe?
>
> Regards,
>
> Peter
>
< snip >
