01 March 2009, 23:56 | #281 |
Doogster
Join Date: Dec 2007
Location: Dorset
Posts: 1,069
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Cool, so i'm going to use 27c322's...they will do the trick?
I'm still learning on the eprom side of things. |
01 March 2009, 23:57 | #282 |
Doogster
Join Date: Dec 2007
Location: Dorset
Posts: 1,069
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I've taken out the original exec and replaced it with Piru's already as it's smaller than the original.
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02 March 2009, 00:17 | #283 |
. . Mouse . .
Join Date: Jun 2005
Location: Nowhere
Age: 55
Posts: 1,792
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Now then, what was it?
It's in my statup-sequence to add a new Ram-Lib. No, can't remember. I'll have to get back to you when I've fired-up my A1200. Still, if you've going for a 1mb Rom I suppose it's a moot point anyway... ...nice to hear it can be done in software, no hardware butchery required - I had a feeling there was a little more to it, glad to be wrong. |
02 March 2009, 08:08 | #284 | |
WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,575
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Quote:
http://eab.abime.net/showpost.php?p=...&postcount=219 (someday I really need to write my own "superrom" that supports compressed modules, automatically unpacks to RAM, including exec.library etc.) |
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02 March 2009, 08:47 | #285 |
(Amigas && Amigos)++
Join Date: Sep 2005
Location: Anrea
Posts: 999
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I will be making my own 1MB rom for my blizzard too! Maybe even tonight, of OS3.9BB2+scsi patch + 1mb rom extension + some other stuff that I can get to work. DoogUK, if I get far and u need any further assistance, jump on IRC.
Toni, Is there anyway to get the 1MB ROM into RAM for faster OS function operations given that one can no longer use the Blizzard MAPROM function? |
02 March 2009, 11:21 | #286 |
Doogster
Join Date: Dec 2007
Location: Dorset
Posts: 1,069
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I'm guessing we could still softkick a 1mb image into ram..
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02 March 2009, 11:28 | #287 | |
WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,575
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Quote:
It is possible to have ROM that includes special boot code that relocates the ROM to RAM but it gets really tricky because you need exec and expansion before you know where the fast RAM is located.. (and it will get even more trickier if you want exec in RAM too..) |
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02 March 2009, 12:58 | #288 |
Thalion Webshrine
Join Date: Jan 2004
Location: Oxford
Posts: 14,479
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Going slightly off topic, how does the Blizzard MAPROM (or any MAPROM) feature work? Does it run a small program on a ROM which performs the copy and sets the MMU to redirect accesses? Is the reason the MAPROM only works for 512Kbyte images a feature of the accelerators firmware?
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02 March 2009, 13:01 | #289 | |
WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,575
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Quote:
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02 March 2009, 15:00 | #290 |
Doogster
Join Date: Dec 2007
Location: Dorset
Posts: 1,069
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I've just built a 1mb rom image..and as stated Piru's exec is at the start. Winuae displays a black screen with no cpu usage registering...so i guess thats a no go.
What rom base address do i need for the 1mb rom Toni? |
02 March 2009, 15:59 | #291 | |
WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,575
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Quote:
AFAIK you need to create 2 ROM files, one at 0x00E00000 and another at 0xF80000. 0xF80000 needs the patched exec. Fill 0x00E0000 ROM with modules that don't fit in "normal" KS ROM space. Then join the files (E0+F8) together. |
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02 March 2009, 16:01 | #292 |
Thalion Webshrine
Join Date: Jan 2004
Location: Oxford
Posts: 14,479
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Interesting workaround, would it not add headers and things?
I wonder if doobrey could easily add this option... are you reading?? |
02 March 2009, 16:32 | #293 |
(Amigas && Amigos)++
Join Date: Sep 2005
Location: Anrea
Posts: 999
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DoogUK and I have been discussing this 1mb rom on IRC. Magic thread for those interested: http://www.amiga.org/modules/newbb/v...=34437&forum=9
Someone has successfully made 1mb rom and you need to use that special more recent version of Remus along with other special instructions (assuming you don't want to use cd32 exec but 1mb rom patch module instead) |
02 March 2009, 16:43 | #294 |
Thalion Webshrine
Join Date: Jan 2004
Location: Oxford
Posts: 14,479
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Oooo...
http://www.doobreynet.co.uk/beta/Remus_1-rc7.lha That thread is from a long time ago... I wonder if this is the latest version... |
02 March 2009, 16:57 | #295 |
Doogster
Join Date: Dec 2007
Location: Dorset
Posts: 1,069
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Which i cannot get to run .
It seems you have to patch the exec, create a 1mb rom with the extended part at the front with the right rom headers, insert romheader and WBstart.lib into the rom image and you should be thereabouts. |
02 March 2009, 17:21 | #296 |
Doogster
Join Date: Dec 2007
Location: Dorset
Posts: 1,069
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hmmm pretty much got the rom image built but i dont know what to do with the romheader...it's not accepted as a module and there's no instructions with it.
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02 March 2009, 18:40 | #297 |
Doogster
Join Date: Dec 2007
Location: Dorset
Posts: 1,069
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Giving up for today, i just cannot get the beta version of remus running which is the one you need to build the extended rom
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02 March 2009, 18:42 | #298 |
Doogster
Join Date: Dec 2007
Location: Dorset
Posts: 1,069
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I have created the 44.57 roms though and they work perfectly in winuae
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02 March 2009, 23:49 | #299 |
Doogster
Join Date: Dec 2007
Location: Dorset
Posts: 1,069
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Ok, after being back and forth with Doobrey who a should add is extremely helpful and i must express my appreciation .
He has updated his remus/romsplit and has included all the necessary patches to create the 1mb rom. Its made the whole process a lot easier and faster but there's still a few steps to overcome, i have created the rom in 2 parts, both are split into hi and lo parts themselves. Doobrey has compiled an Arexx script to join the roms together to create the full 1mb rom, which i cannot get to run pilot error i suspect but i'm waiting to hear back from Doobrey. Just one question for Toni, does winuae support loading 1mb roms? For anyone interested the new remus/romsplit archive is here: http://www.doobreynet.co.uk/beta/index.html |
02 March 2009, 23:52 | #300 | ||
Hamster tamer
Join Date: Apr 2007
Location: Out in the woods
Posts: 122
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Quote:
i. There's no code in compactflash.device to find the RDB,load filesystems and mount partitions ii. The device uses a couple of dos.library functions.. but dos won't be available at boot time (and it also doesn't check for failure when it tries to open dos!) Quote:
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