If you appreciate the work done within the wiki, please consider supporting The Cutting Room Floor on Patreon. Thanks for all your support!

Talk:Sega Channel BIOS (US)

From The Cutting Room Floor
Jump to navigation Jump to search

I believe the article I've written so far is the SciAm ROM. I have another copy of a ROM where the diagnostic information is at 0xEDC3 and begins "GI SegaChannel Remote DiagnosticSep 12 1995". As soon as I verify the other is not GI as well I can update the article. --Zontar 15:34, 16 January 2013 (EST)

What is the md5sum of the ROM you used? - Andlabs 15:44, 16 January 2013 (EST)
"1cf54fc6a7dd4dbc33a37f3aad703d42 Sega Channel (JUE).bin" --Zontar 16:00, 16 January 2013 (EST)
That's the SciAm one. For the record:
e2b2075cd7aa405a8745bda2e4d9c115  /home/pietro/nointro/mdroms/Sega Channel (USA) (General Instrument) (Program).md
1cf54fc6a7dd4dbc33a37f3aad703d42  /home/pietro/nointro/mdroms/Sega Channel (USA) (Scientific Atlanta) (Program).md
a45842e6f4ba3441a67077a0416ddde3  /home/pietro/nointro/mdroms/Sega Channel Demo (USA) (Program).md
(there are some prototypes no-intro has yet to add) - Andlabs 16:02, 16 January 2013 (EST)
All right, looks like this unit is the SciAm unit. Other MD5 matches for the GI unit as well. I have no demo unit. Would this best be segmented in the same article or should this article be retitled Sega Channel BIOS (Scientific American) (US) and split off a new one for the GI unit? --Zontar 16:05, 16 January 2013 (EST)
I would just have the ROM addresses together unless the text is different. For instance 0xGHIJ (General Instruments)/0xKLMN (Scientific Atlanta) - Andlabs 16:06, 16 January 2013 (EST)

Fan Club Address

Is it censored like that in the ROM, or was this done after the fact? --BMF54123 15:55, 16 January 2013 (EST)

The fan club address is redacted in the ROM. I made no chances copying it out of the hex editor. --Zontar 16:00, 16 January 2013 (EST)
It is censored like that in both of the standard ROMs; the Demo ROM does not seem to have the fan club text at all. - Andlabs 16:03, 16 January 2013 (EST)

Diagnostic stuff

The messages mentioned in the Error Text section are used by the exception handlers if I recall correctly. You'd need to cause the 68000 to crash for this.

Regarding the diagnostic tool text, I had found code that allows the program to communicate through joypad port 2 using serial mode (the demo ROMs use the modem port instead). I didn't get far enough to figure out where it's used, but it may be related to this. Somebody else may have more information. —Sik 03:36, 18 March 2013 (EDT)