24 February 2009, 08:29 | #261 |
70X7
Join Date: Apr 2008
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UV chip,need essentially UV eraser?,
or normal UV-led,or the sun light..t is ok? Edit: lol i found this! > http://sci.tech-archive.net/Archive/.../msg00790.html Last edited by Anemos; 24 February 2009 at 08:40. |
25 February 2009, 20:35 | #262 | |
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Quote:
Hi, can i just see if i understand his process right. The original kickstart file is 524288 bytes long and we need to split this file into 2 equal 262144 byte files (i like using the split files option in Total Commander). the lower portion of the split file being burnt onto U6A and the upper portion burnt onto U6B. Because these chips are 512K is it safe to say that once we split the 512k file into 2 we can simply for instance create 2 of the lower portion 256K files and join them (Again using the join files option in Total Commander) to make a 512k file (so that the upper and lower 256k portions are the same). and then burn that to U6A. Repeating the process for U6B so that the upper 256K portion of the original 512k file is joined with itself to create a 512K file and then burnt onto U6B ... It is kinda confusing, but is this correct ? |
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27 February 2009, 00:38 | #263 |
Ya' like it Retr0?
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Heys Kippers
yep thats exactly the way you describe it Although, you could (if using a 27c400 or 800) put another ROM file in the upper address, you could then have a simple switch that powers up the upper address line for both chips... job done, instant kickstart switcher in two chips I may well do a how to on this |
27 February 2009, 05:06 | #264 | |
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Quote:
Thanks, that sounds good, i assume an address line has to be tied high or low to switch it. A how to would be great |
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27 February 2009, 21:19 | #265 | |
Hamster tamer
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Quote:
eg. If the ROM image was "AABBCCDD12345678" you'd end up with 2 files "AACC1256" and "BBDD3478" |
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27 February 2009, 22:11 | #266 | |
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Quote:
so you are saying that the way the A1200 addresses the roms is to read the low byte on U6A, and then the upper byte on U6B. Just when i thought i had it figured out ya threw a wrench in the works.. so the 32 bit bus is reading 16 bits from U6A and the next address is 16 bits on U6B etc... etc ? |
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27 February 2009, 22:41 | #267 | |
WinUAE developer
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Quote:
*) CD32 has single 16-bit ROM. Special case, as cheap (and slow) as possible |
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01 March 2009, 17:49 | #268 |
Doogster
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Ok, moving along nicely with creating these new roms but hit a problem...i cannot extract the 44.57 rom update from OS3.9 BB2 as it requires a password? and i'm not going to install it on my 1200 just to get it that way.
If anyone has the 44.57 rom update i'd be gratetful for it...and yes i own a legal copy of OS3.9. I've already built a 44.26 updated rom in remus and it works fine on amiga forever Will post a big "howto" when i can complete the 44.57 rom. |
01 March 2009, 19:55 | #269 |
Doogster
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Found the password in an old thread on here
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01 March 2009, 20:03 | #270 |
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01 March 2009, 20:17 | #271 |
Doogster
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Ahh not that actual file...if you go into that lha inside there is a file called AmigaOSupdate, this is a passworded zip file and the actual 44.57 rom update is in the devs drawer.
Anyway success, i have now created the a1200 3.9 rom and it boots in winuae Going to burn it to roms in a bit and see if they work on the miggy. |
01 March 2009, 21:00 | #272 |
Thalion Webshrine
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When you write your guide I'd be curious to know what files are actually inside a KS ROM, what versions they are for v3.1 40.68 and then know which files get replaced with OS3.9 BB2 files and what versions the new ones are...
Are you considering adding extra files? I'd like to know if you can add things like; cfd the CF card driver which would allow you to boot from CF card with no hard drive? I'd also be curious to know what adding/replacing files to the KS ROM does to RAM usage. Obviously the more things you put in there... the more things get loaded into RAM on power on? Last edited by alexh; 01 March 2009 at 21:10. |
01 March 2009, 21:52 | #273 |
Doogster
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The problem there is space, the files you replace are larger in size than their earlier versions, doobrey reccomends taking out workbench.library to make more space available which i have done but now classicwb will not start as scalos is looking for the resident older version which isnt there.
Remus reads it as a 512k rom and therefore will only let you fill up to that limit. The other configs in amigaforever have all loaded fine with the new rom. I'm pretty sure if you had the space you could load different resident devices and as such boot make the CFD bootable. I dont know enough about eproms and the amiga to know if you can use the extra size in say a 1 meg eprom and fill it with goodies of your own choice...Maybe Toni can tell us something about that. I'll take some screenshots of Remus in action for you Alex as it lists everything in the KS. I've yet to burn the 44.57 KS to rom as i want to make sure i can run ClassicWb on them ok first. |
01 March 2009, 22:01 | #274 |
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01 March 2009, 22:24 | #275 |
Doogster
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Hmmmm seems i can select 1mb rom before i start to build an KS image, will the A1200 automaticaly use all this area? or just the first 512kb?
Where's Toni when you need him |
01 March 2009, 23:15 | #276 | ||
. . Mouse . .
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Quote:
Load the original WB.lib early in startup-sequence & hopefully classicwb / scalos will proceed as normal? Quote:
...I'll try to remember where (if) I read it, though no doubt others (Toni) will get there first... ...being able to get a 1mb ROM to work would be the impetus I'd need to invest in some equipment... hmmm, Blizzard accelerator... |
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01 March 2009, 23:17 | #277 |
Doogster
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I'm gonna hang back from buring the roms for now and investigate using the full 1mb a bit more...you could seriously load some cools stuff in there.
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01 March 2009, 23:19 | #278 |
Doogster
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What line should i put in my startup to load the WB.lib?
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01 March 2009, 23:51 | #279 |
Doogster
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For Alex, on the left side are the contents of the 40.68 3.1 rom, on the right side are the contents of the BB2 44.57 update.
You just remove ones that are to be replaced from the the left list and then replace them with the newer versions on the right. You can also browse for more mudules that you would like to add yourself to the rom image. When you're done you hit build image and it saves it as the .rom file. |
01 March 2009, 23:52 | #280 |
Thalion Webshrine
Join Date: Jan 2004
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A1200 will use a 1MB ROM with no hardware mods (A4000 will not).
To use a 1MB ROM you must use patch exec or use Piru's exec replacement. |
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