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k2x4b524[
May 31st, 2010, 08:29 PM
I have been reading the stickies about the ROM info as i have just acquired a ROM burner and would like to start using it, but would like to test it. I have some chips on order, differing capacities.

Any place i could actually GET images of the XT Bios?

After i post this i will search the forum, so this may go away quick :) *Found Site with ALL Images*

Also, if one has it, i'd like the Future Domain TMC-860 8.2 Aswell :) *Still workin on this one*

lutiana
June 1st, 2010, 01:55 PM
I have a link at home for a custom XT bios that fixes some issues and looks pretty good. I'll post that link here later.

Are you adverse to flashing chips for other people? I'd love to get my 5160s BIOS upgraded. Where do you live?

EDIT: Its not my modified BIOS, someone else wrote it and posted it. I do not think it has a CMOS setup in it, just some bug fixes and performance tweaks IIRC

southbird
June 1st, 2010, 03:22 PM
Hmm... upgraded XT BIOS? I never really thought about that. I guess you could even go so far as to implement a full CMOS type setup, eh? For the few things worth configuring on the machine... :D

lutiana
June 1st, 2010, 03:31 PM
I'll post that link here later.


Here (http://www.phatcode.net/downloads.php?id=101) it is.

From the site:




Bug Fixes



Warm boot flag restored after external ROM initialization code (fixes problem where CTRL+ALT+DEL does cold boot instead of warm boot)
Equipment Flag in BIOS Data Area now set correctly
Fixed cursor shape when using Hercules card (was in the middle of the character before)



Added



Optional define to always boot up in turbo mode (TURBO_BOOT)
Optional define for fast memory check (FAST_MEM_CHECK); uses one test pattern only
Optional define for 101-key keyboard shift+nav keys work-around (KEYB_SHIFT_FIX)
BIOS is now EGA/VGA aware; will only test video memory on Mono/Herc/CGA cards
Nicer boot screen with color support for CGA/EGA/VGA
Processor and Math Coprocessor detection
Memory test displays count every 8K; speeds up memory check on fast systems with slow video cards
User has option to boot ROM BASIC even if bootable disk present
Supports booting from hard drive (if external controller ROM present)
Toggling turbo on/off sounds high/low-pitched beep rather than changing cursor shape

k2x4b524[
June 1st, 2010, 06:06 PM
I live in seattle, Wa. I'm waitin on my chips to arrive, let me see how it goes for me, before i commit to flashing anyone else :)

MikeS
June 2nd, 2010, 01:35 PM
After i post this i will search the forum, so this may go away quick :) *Found Site with ALL Images* Want to share that link in case someone else is interested?

k2x4b524[
June 2nd, 2010, 01:58 PM
My Bad - Here it is

http://members.dodo.com.au/~slappanel555/bios.htm

hargle
June 2nd, 2010, 02:15 PM
So this site says use 27256 eproms to burn the data onto. These are out of stock at mouser (didn't check jameco). Does anyone know of a compatible eeprom that could be used instead? I'd rather not have to erase these chips by leaving them in the sun for a month. ;)

oh my. I think I found my answer on that site.
http://members.dodo.com.au/~slappanel555/5150_u33.htm

Chuck(G)
June 2nd, 2010, 02:36 PM
Why not just use an MC68764 or -66 EPROM? They're not expensive; they're available and they require no modification.

glitch
June 2nd, 2010, 02:43 PM
So this site says use 27256 eproms to burn the data onto. These are out of stock at mouser (didn't check jameco). Does anyone know of a compatible eeprom that could be used instead? I'd rather not have to erase these chips by leaving them in the sun for a month. ;)

I've got a pile of 27256 EPROMs and an EPROM UV eraser. Let me know if you have trouble finding them.

k2x4b524[
June 2nd, 2010, 02:49 PM
I've got a couple of spare AMTEL chips left over from the XT-IDE Project in the meantime, will those work in an eprom burner?

MikeS
June 2nd, 2010, 03:46 PM
Why not just use an MC68764 or -66 EPROM? They're not expensive; they're available and they require no modification.Definitely the way to go; they're also direct replacements for 8K ROMs used in many other systems like the C64 etc.

But failing that, it's pretty easy to make an adapter to use JEDEC standard 2764+ chips; all except three or four pins are the same (same pins, different numbers because 28 vs. 24 pins), so just stack two IC sockets together with a piece of paper in between to insulate the relocated pins, bend out the two or three pins on the top socket and solder jumpers to the appropriate pins on the bottom one.

While you're at it you could even use a 27128 or larger and connect a jumper or switch(es) to the high address pin(s) to select one (or more) alternate ROM images in the same chip; a few of my systems have that to select different boot roms..

MikeS
June 2nd, 2010, 03:52 PM
I've got a couple of spare AMTEL chips left over from the XT-IDE Project in the meantime, will those work in an eprom burner?Depends on the chips and the burner ;-)

MikeS
June 2nd, 2010, 03:54 PM
I've got a pile of 27256 EPROMs and an EPROM UV eraser. Let me know if you have trouble finding them.I'll bet my pile of 27128s is bigger than yours, nyah, nyah! Not quite so many '32s, '64s and >128 though.