Re: Help! Motherboard CMOS barrel battery!
Posted on 2022-07-11, 01:08
It worked! Thanks all!
Re: Help! Motherboard CMOS barrel battery!
Posted on 2022-07-10, 23:45
This is very helpful. Thank you! Is this a fairly low risk procedure or is there a chance I might destroy the board doing this?
Help! Motherboard CMOS barrel battery!
Posted on 2022-07-10, 22:02
Hi! I’ve got this great 486 retro system and the motherboard unfortunately has a barrel type CMOS battery. Everything still works perfectly. It also has a jumper for an EXTERNAL battery. I’ve attached pictures. It looks like it will be difficult to cut it off but I have limited experience so wanted …
Re: Will this motherboard support an Intel DX2-66 processor??
Posted on 2021-12-25, 19:27
Thanks! But based on the board jumper details as seen in the pictures, how would one configure it to recognize the DX2-66 and not fry the board?
Will this motherboard support an Intel DX2-66 processor??
Posted on 2021-12-25, 18:42
Hi, I’m thinking of purchasing this motherboard. It currently has an Intel 486-SX33 processor in it and I want to upgrade it to a DX2-66 processor. Unfortunately it is a generic motherboard with no manual. The only descriptions on the board that are helpful are in the picture. Will I successfully be …
Switched motherboards, now screen garbled on old game!
Posted on 2021-12-24, 13:44
Hi! You guys have saved me many times before so I was hoping for some help here. I’m trying to boot King’s Quest 1 (Tandy / IBM PC Jr) on my retro 486. It will boot and actually play but the screen is garbled and flashing (see picture). Any advice? I recently switched out motherboards with the exact …
Help with booting Sierra King’s Quest 1 on my 486 retro computer!
Posted on 2021-12-24, 13:37
Hi! You guys have saved me many times before so I was hoping for some help here. I’m trying to boot King’s Quest 1 (Tandy / IBM PC Jr) on my retro 486. It will boot and actually play but the screen is always garbled and flashing (see picture). Any advice? I recently switched out motherboards with …
Re: Help! Trying to connect LED frequency display to new AT Power Supply
Posted on 2021-01-02, 16:43
Yes it should be a 5 volt line, you should open the dead PSU to be sure. Thank you! Yes, that LED frequency cable hooked directly into the old PSU at a +5V terminal, same place as a bunch of other red cables (picture attached). So is it as simple as splicing together one of the red / black unused …
Help! Trying to connect LED frequency display to new AT Power Supply
Posted on 2021-01-02, 15:22
Hi! Need expert help. I’m trying to connect the LED frequency display on my retro AT case to a new AT PSU. The old PSU is fried and had a direct red/black cable going to the frequency display LED, which is now cut so I could remove the fried PSU. The new AT PSU does not have a dedicated wire like …
Re: Need help from the experts! Turbo button causing AMIBIOS 10 beep post code (CMOS shutdown register read/write error)
Posted on 2020-10-14, 21:07
Hi, Thanks for your thoughts. I dug up the motherboard manual and it actually says that some VLB expansion cards won’t run with turbo OFF during boot up because of a reduced FSB speed. The manual recommends always booting up with turbo ON and then turning it off if desired once up and running. My …
Need help from the experts! Turbo button causing AMIBIOS 10 beep post code (CMOS shutdown register read/write error)??
Posted on 2020-10-12, 17:41
Hi, Was hoping for a little help debugging this. Every time I push the turbo button to “OFF” and cold reset my retro 486 machine, I get a blank screen at boot with a 10 beep post code error (AMIBIOS). This is listed as the “CMOS shutdown register read/write error.” If I hit the turbo button again to …
Re: CDROM not recognized in DOS after a SOFT reset but works fine after a HARD POWER OFF reset. Any ideas?
Posted on 2020-08-03, 13:24
Awesome ideas guys. I would just operate it as master / slave but the IDE ribbon cord won’t reach so I really wanted to use the CDROM on the secondary controller. I did get it to work! I tried every idea you guys listed and what finally did it was loading the DTC controller card driver and setting …
Re: CDROM not recognized in DOS after a SOFT reset but works fine after a HARD POWER OFF reset. Any ideas?
Posted on 2020-08-02, 18:59
Pentiumspeed — thank you so much for your help. The plot thickens — everything works fine if the CDROM is on the primary IDE controller as SLAVE. I can push the reset button and it loads fine on DOS. If it is on the secondary IDE controller as a master, it will NOT work after a RESET button reset. I …
Re: CDROM not recognized in DOS after a SOFT reset but works fine after a HARD POWER OFF reset. Any ideas?
Posted on 2020-08-02, 11:55
IDE/PATA, ATA has reset line as well. This means it is not asserted properly. Cable, controller card please try them. Cheers, Hi, CD-ROM is NEC Multspin 6V CDR-1350A EIDE Controller card is DTC 2278D IDE I have it connected to the second IDE controller on the card using a 40-pin (80 wire) cable. …
CDROM not recognized in DOS after a SOFT reset but works fine after a HARD POWER OFF reset. Any ideas?
Posted on 2020-08-01, 15:53
Hi, Building my 486 retro PC. My NEC multisync 6V CDROM works fine after a COLD HARD POWER OFF reset and is recognized in DOS . However, after a soft reset (CTRL-ALT-DEL or reset button), the dos driver gives the error: CD-ROM drive not ready. A(Abort) or R(Retry) Will work fine if I hard power off …
Re: Setting up ROLAND MPU-401 and MT-32 - PLEASE HELP!
Posted on 2020-08-01, 01:51
Update: Space Quest 3 works fine. The DOS midi players have no sound output. Strange!
Re: Setting up ROLAND MPU-401 and MT-32 - PLEASE HELP!
Posted on 2020-07-31, 23:26
Hello all! You guys have been awesome so far. I need help setting up my Roland MPU-401 and MT-32. I’m using a Low-Tech MIF IPC RevB interface card to connect to my retro 486 DOS PC. I’m trying to test the hardware to make sure everything works. The MT-32 passes its “test mode” but when I hook the …
Setting up ROLAND MPU-401 and MT-32 - PLEASE HELP!
Posted on 2020-07-31, 22:52
Hello all! You guys have been awesome so far. I need help setting up my Roland MPU-401 and MT-32. I’m using a Low-Tech MIF IPC RevB interface card to connect to my retro 486 DOS PC. I’m trying to test the hardware to make sure everything works. The MT-32 passes its “test mode” but when I hook up the …
Re: Need HELP with 486 DX2 cooling - what to buy?
Posted on 2020-07-20, 19:45
Done! Thank you!!!!!!
Need HELP with 486 DX2 cooling - what to buy?
Posted on 2020-07-20, 17:43
Hi, You guys have saved me before and I need some more help. Fairly new at this but I’m building a 486DX266 DOS machine. I need to get some sort of cooling for the CPU. I will be replacing the Cyrix with an Intel. This may seem like a really basic question but could someone direct me as to what …
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