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TOS 2.06 CRC error after burning (Exxos diagnostic cart)

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Pacman
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TOS 2.06 CRC error after burning (Exxos diagnostic cart)

Post by Pacman »

I've burnt TOS 2.06 into two 27C010 EPROMs, put them back into my STe (with the correct EPROM jumper settings) and all appears to work fine.
But if I run the ROM test in the Exxos diagnostic cartridge I get a CRC error.

Is this "normal" or have I made a mistake somewhere along the way?
STe | MonSTer with dual IDE-CF memory card adapter | NEC Multisync 1990SXi | ST_ESSC | RSVE | Link '97 | Sony HD floppy drive/AJAX controller | Exxos HD floppy module | Battery-backed Ricoh realtime clock module | Discovery cartridge | C-Lab Unitor-2 | C-Lab Export | C-Lab Combiner | C-Lab Steady Eye | C-Lab Human Touch | Unicorn USB

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Re: TOS 2.06 CRC error after burning (Exxos diagnostic cart)

Post by rubber_jonnie »

Pacman wrote: Tue Dec 03, 2024 2:54 pm I've burnt TOS 2.06 into two 27C010 EPROMs, put them back into my STe (with the correct EPROM jumper settings) and all appears to work fine.
But if I run the ROM test in the Exxos diagnostic cartridge I get a CRC error.

Is this "normal" or have I made a mistake somewhere along the way?
I can't remember the reason why, but IIRC this is normal.
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Re: TOS 2.06 CRC error after burning (Exxos diagnostic cart)

Post by Pacman »

rubber_jonnie wrote: Tue Dec 03, 2024 3:22 pm I can't remember the reason why, but IIRC this is normal.
Strange, but I think you're right according to this posting, though I'm not getting any errors while booting.
Prior to burning the two EPROMs I used Ppera's ROMsplit program to split the single TOS file into two parts (high and low). I'm almost sure I clicked on its "Fix CRC for TOS 2.06" button, so either I didn't or I'm getting error messages in the diagnostic software regardless.
STe | MonSTer with dual IDE-CF memory card adapter | NEC Multisync 1990SXi | ST_ESSC | RSVE | Link '97 | Sony HD floppy drive/AJAX controller | Exxos HD floppy module | Battery-backed Ricoh realtime clock module | Discovery cartridge | C-Lab Unitor-2 | C-Lab Export | C-Lab Combiner | C-Lab Steady Eye | C-Lab Human Touch | Unicorn USB

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Re: TOS 2.06 CRC error after burning (Exxos diagnostic cart)

Post by Badwolf »

Does the diagnostic cart know about TOS2.06? If not, then you'd probably expect this.

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Re: TOS 2.06 CRC error after burning (Exxos diagnostic cart)

Post by Pacman »

Badwolf wrote: Wed Dec 04, 2024 12:37 pm Does the diagnostic cart know about TOS2.06? If not, then you'd probably expect this.
Good point! I should pop my original TOS 1.62 ROMs back in (and adjust the 3 ROM-jumpers accordingly) to check, but that could probably explain the errors I'm getting.
I suppose if I had really done something incorrectly during the splitting and burning of the new TOS image files into the EPROMs I wouldn't be able to boot and/or I'd get some error messages while booting (like the poster in that other thread I referred to did).
STe | MonSTer with dual IDE-CF memory card adapter | NEC Multisync 1990SXi | ST_ESSC | RSVE | Link '97 | Sony HD floppy drive/AJAX controller | Exxos HD floppy module | Battery-backed Ricoh realtime clock module | Discovery cartridge | C-Lab Unitor-2 | C-Lab Export | C-Lab Combiner | C-Lab Steady Eye | C-Lab Human Touch | Unicorn USB

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