Re: Alaris Leopard Rev C 486SLC2 (MR-BIOS???)
Posted on 2023-02-02, 20:08
sonicx wrote on 2023-02-02, 11:50: Everything works fine Great!! It only took about six years to find a working version. 😀
Re: Alaris Leopard Rev C 486SLC2 (MR-BIOS???)
Posted on 2023-02-01, 20:10
Swapping the ROM BIOS presents almost no risk. If you have a rev A BIOS it might work on a later board revision. Can you upload the ROM? https://theretroweb.com/motherboards/s/alaris-leopard-rev-a I spent hours going through my library of MR-BIOS images and yet, I think the best candidate was out …
Re: Alaris Leopard Rev C 486SLC2 (MR-BIOS???)
Posted on 2023-01-31, 22:54
Anonymous Coward wrote on 2023-01-22, 09:49: No, this BIOS image is surprisingly still missing. What about MR-BIOS release for rev. A of this board? Would it work?
Re: Alaris Leopard Rev C 486SLC2 (MR-BIOS???)
Posted on 2023-01-30, 17:18
No, this BIOS image is surprisingly still missing. I have hoarded over some time an extensive collection of MR BIOSes. I just purchased the board with AMI and looking forward to an upgrade, but since I paid a lot of money for it I am afraid to ruin it on the very next day. Is there anything in …
Re: Alaris Leopard Rev C 486SLC2 (MR-BIOS???)
Posted on 2023-01-21, 21:17
Anonymous Coward wrote on 2020-11-01, 13:20: No, I am pretty sure the MR BIOS for this board hasn't been found. But, I am fairly certain it exists. Hi, were you able to acquire a MR BIOS for this board?
Re: Understanding OLD Motherboard Jumpers.
Posted on 2021-09-26, 13:45
IBM 486-V266GA = Cyrix 486DX2 -> M7 ( 5v) cx486s -> M5 cx486dx -> M6 cx486dx4 -> M9 ( 3.45V ) Unlike the mentioned M8 before by dionb, I thought it rather should've been like you pointed out above. I also found additional website: https://www.pchardwarelinks.com/486.htm ; where it says next to …
Re: Understanding OLD Motherboard Jumpers.
Posted on 2021-09-24, 15:42
When i tried to build a 486 i took a look at some manuals to see the CPU jumper settings With new people jumping in the retro stuff, it is kind of difficult to really understand the settings Lets suppose you are building a 486 motherboard that has jumpers. You are given options like: 1) 486 SX 2) …
Re: 486 boot problem
Posted on 2021-09-19, 12:12
Thank you for your investigation, it's interesting, but I don't know if it's that simple (...) and I think it is an OEM version of Shuttle HOT 419 plates, sold under the brand name Forcom. Obviously you did your homework well and you know much more about your board than I do. I wasn't even aware …
Re: 486 boot problem
Posted on 2021-09-18, 15:08
I'm afraid I can't help you with advice, my board is an older version of HOT 419 with the same chipset, but with a slightly modified configuration. Well... thanks to your input the confusion is over. I looked up HOT 419 motherboard and it turns out that there is an error on www.win3x.org website. …
Re: 486 boot problem
Posted on 2021-09-17, 16:38
I think the 'B' type resistor networks are in pairs (so 1&2, 3&4, 5&6, 7&8), and the '0' means zero ohms. So I think those blocks are effectively just jumpers. I'd guess from the silkscreen that JPB and JPC select between Intel (pins 3-10 of JPB), AMD (pins 1-8 of JPB) and Cyrix (pins 3-10, the …
Re: 486 boot problem
Posted on 2021-09-17, 16:26
I'm afraid I can't help you with advice, my board is an older version of HOT 419 with the same chipset, but with a slightly modified configuration. But the configuration for the FSB is the same, and I noticed it's set to 50 MHz on your photo, which is why I wrote to you. The jumper settings table …
Re: 486 boot problem
Posted on 2021-09-17, 13:06
This I don't understand. Resistor pack has visible pin one mark, but since this is undocumented I don't know if their position is correct. Pin 1 is the box or square on those headers, printed under them on the board, so in the picture if the pin one mark is to the left that should be correct. This …
Re: 486 boot problem
Posted on 2021-09-17, 12:29
I have a similar, only older board (5V CPU only). There's a silly trick question: JP23/22/21 do not follow each other as printed in config table on the board, but are swapped JP23/21/22. As I can see in the photo, you have the jumpers set to FSB 50 MHz, but the DX4-120 is supposed to be 40 MHz. …
Re: 486 boot problem
Posted on 2021-09-17, 12:12
I'd wanna check the orientation of the resistor pack, it may or may not matter depending on type of resistor pack. Yeah, resistor pack... I'm clueless about those and their orientation. Not mentioned in the "manual" or on anywhere on the board itself. ... if it's all resistors to one pin then it …
Re: 486 boot problem
Posted on 2021-09-17, 12:06
the psu cables when connected to motherboard incorrect socket order so be sure they are correct and i recommend a heatsink for that cpu is why it has that blemish on it could be dead from teatstroke lol Cables powering the board are "black inside", heatsink is there while the board is powered on …
Re: 486 boot problem
Posted on 2021-09-16, 17:59
Deksor wrote on 2019-03-23, 14:31: Where does the board get hot ? On the opti chips ? Maybe something is shorted ? Check on the AT slot if the GND isn't shorted with +5v/+12v How would I do that?
Re: 486 boot problem
Posted on 2021-09-15, 19:19
Greetings all. I have acquired the same motherboard and have same problem. Manual found at: http://www.win3x.org/uh19/motherboards/2495 or https://stason.org/TULARC/pc/motherboards/F/FORCOM-TECHNOLOGY-CORPORATION-486-419.html does not list Am486DX4-120, but the board came with it. Jumpers seems to …
Re: Octek hippo vl+ and eeprom
Posted on 2021-08-20, 03:28
I just got supplied Mr.BIOS for this board by someone. But I don't have flash writer yet. I will have it next month and can download the bios for you from my chip and/or compare bioses, if you can wait. Otherwise you need to look what chipset you have. If you have OPTI or not - that should be …
Re: Octek hippo vl+ and eeprom
Posted on 2021-08-19, 00:39
What hides under that DCA sticker ( I don't want to remove mine ) on the Hippo VL/VL+/VL PRO and Hippo DCA 1 ? I downloaded two BIOS upgrades from: https://www.elhvb.com/mobokive/archive/octek/486/Hippo%20DCA1%20&%20VLplus/index.html namely: Hippo DCA 1 MRBIOS 3.21 Support Cyrix 5x86 AMD 5x86.exe …
Re: Can anybody diagnose this behavior?
Posted on 2021-07-23, 12:35
I had to check one of my threads here about a battery damaged 386 main board, which had an identical issue, though PG signal problem showed up after I had dealt with constant reboots. IIRC it had few open traces that went to the keyboard controller. Then I assume to repair this issue, caused by a …
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