Re: Missile Command ROM hack?

What would be the best way to check if the "big rom" was assembled
correctly? I'm not certain the Missile Command board that I have works
(or works correctly) and I'm guessing MAME won't accept a single ROM
image.

tom

Doug Jefferys wrote:
>
> On Tue, 10 Oct 2000, Rodger Boots wrote:
> >
> > Or maybe even drop into DOS on your computer and type the line
> >
> > COPY ROM1+ROM2+ROM3+ROM4 BIGROM
> >
> > where the individual names are the individual ROM files and BIGROM is
> > the resulting combined file. With any luck you'd end up with one
> > large file (check the size of the file to see if it assembled correctly).
>
> Nitpick: COPY /B file.1 + ... + file.n big.rom
>
> The /B tells it to do a binary copy - DOS uses ^Z (Ctrl-Z) as an
> end-of-file marker, and gets confused in text mode.
>
> In text mode (COPY), if the file *contains* a ^Z, nothing happens, but if
> a file *ends* with a ^Z, the ^Z is dropped. It confused the hell outa me
> the first time I tried concatenating ROMs where one file just happened to
> end in a ^Z, until I actually looked at what the concatenated file
> contained.
>
> In binary mode (COPY /B), this problem never occurs, and a trailing ^Z is
> treated correctly, resulting in a correctly-concatenated ROM.
>
> Later,
> Doug.
>
> --
> dougj |
> @ |
> hwcn.org |
>
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Received on Wed Oct 11 13:20:41 2000