TOS 2.06 CRC error after burning (Exxos diagnostic cart)

Upgrade or replace the ROM.
User avatar
Pacman
Posts: 256
Joined: 28 Aug 2017 00:56
Location: Norway

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

💧Are you a good person? 💧Living Waters
User avatar
rubber_jonnie
Site Admin
Site Admin
Posts: 14888
Joined: 17 Aug 2017 19:40
Location: Essex

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

Post by rubber_jonnie »

Pacman wrote: 03 Dec 2024 14:54 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.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
User avatar
Pacman
Posts: 256
Joined: 28 Aug 2017 00:56
Location: Norway

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

Post by Pacman »

rubber_jonnie wrote: 03 Dec 2024 15:22 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

💧Are you a good person? 💧Living Waters
User avatar
Badwolf
Site sponsor
Site sponsor
Posts: 3043
Joined: 19 Nov 2019 12:09

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.

BW
DFB1 Open source 50MHz 030 and TT-RAM accelerator for the Falcon
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
User avatar
Pacman
Posts: 256
Joined: 28 Aug 2017 00:56
Location: Norway

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

Post by Pacman »

Badwolf wrote: 04 Dec 2024 12:37 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

💧Are you a good person? 💧Living Waters

Return to “ROM UPGRADES”

Who is online

Users browsing this forum: ClaudeBot and 2 guests