Re: PS/2 Pinout
Posted on Yesterday, 19:35
I don't think there's any harm in getting clk and data the wrong way around, so you could just try it one way and if it doesn't work try it the other way.
Re: Creative Sound Blaster PRO 2 (CT1600) and Mitsumi CD ROM?
Posted on Yesterday, 19:09
Yeah, I think Creative used the MKE bus (Matsushita and Panasonic I think), and I don't recognize that Mitsumi drive as one of the few MKE drives. I know the Matsushita cr562 and 563 were two of them. This page: https://unitedandco.net/2021/07/24/mitsumi-lu005s-cdrom-interface-card-how-to/ suggests …
Re: Bought these (retro) hardware today
Posted on 2023-05-26, 15:30
You might check out archive.org: https://archive.org/details/winner-99-f I don't know which drivers are included, but it should be fairly complete, being a full cd ... I did check a few ELSA images on there, but none of them worked for me. They were either too old (pre-2001) or didn't want to …
Re: Please, can you help with this Turbo display puzzle???
Posted on 2023-03-01, 21:21
Looks like the usual 'T' arrangement. Top row is units, middle is tens and bottom is hundreds. You can see the letters A-G on the units header pins which correspond to the bars on the 7-seg digits: a f b g e c d Jumper from the center pin to either 1,2 or 3 to make the bar come on in low speed, high …
Re: Old pc case set cpu speed display jumpers? cdisp-201701
Posted on 2023-02-16, 22:31
They're normally arranged as a series of 'T' shapes. For each bar of the 7-seg there's one jumper going from the centre of the 'T' to either the left, right or middle branch. Right/Left makes the segment light up when either High or Low, middle makes it always light up, remove the jumper makes it …
Re: help wanted turbo display settings
Posted on 2023-02-16, 22:10
Bit of guesswork here, but they're normally arranged as a series of 'T' shapes. For each bar of the 7-seg there's one jumper going from the centre of the 'T' to either the left, right or middle branch. Right/Left makes the segment light up when either High or Low, middle makes it always light up, …
Re: PC "waits" for 15 seconds on boot
Posted on 2023-02-10, 17:06
Maybe try version 1010 from here https://theretroweb.com/motherboards/s/asus-p5a-b#downloads , it would still be an update from your current 1007. Looks like the beta BIOS POST string went for a 4 digit year code which might be confusing things. Perhaps the year is intruding in to the model string …
Re: Identify motherboard thread
Posted on 2023-01-30, 11:45
I think the 20K line says that they're made by Kemet and are 20V rated. Replacement doesn't have to be Kemet, just 22uF and 20V rated. Actually, depending on which voltage supply it's connected to then other voltages might also be ok. Not sure about the size, maybe 2917 (7343 metric, so 7.3mm long …
Re: Identify motherboard thread
Posted on 2023-01-26, 15:47
Looks pretty close to this: https://theretroweb.com/motherboards/s/dec-pc-386sx-ce-p3348 https://theretroweb.com/motherboard/manual/33997.pdf Not sure about the DEC listing there. Looks like it was used in the Philip P3348: https://www.it-info.hu/2020/09/08/retro/
Re: Asterisk (*) sign at CPU during POST?
Posted on 2023-01-15, 20:16
Since it shows CPU1, I wonder if the BIOS supports SMP, even if the board doesn't, and the * indicates the default CPU? I found a picture of an SMP boot on the Award Medallion BIOS here:https://www.askwoody.com/forums/users/dave3283/replies/ which shows CPU2 with a *.
Re: AwdFlash part number mismatch error
Posted on 2023-01-14, 10:02
Had a quick look at the datasheets and the original w29c011a supports 5V erase and programming, but the mx28f1000ppc needs a 12V supply. So it's possible that the motherboard can't write to the mx chip. I haven't checked to see if there are other differences, but things like block sizes might cause …
Re: DigiPOS adventures!
Posted on 2023-01-07, 17:29
So, the keyboard has a good +5 supply, but no good Ground? And I think clock and data lines both have pull-ups on them. So the only time the keyboard would see a ground on any pin would be when the motherboard tried to send a status byte to the keyboard and pulled clock and data low. Doesn't sound …
Re: DigiPOS adventures!
Posted on 2023-01-07, 15:23
megatron-uk wrote on 2023-01-07, 10:21: starts measuring at 10M Ohms and increasing until it goes off-scale at 30M Ohms. Capacitative charging? Is that fuse on the Ground side? Might explain why there was still 5V on the pin.
Re: DigiPOS adventures!
Posted on 2023-01-06, 15:39
What's the voltage on the PS/2 +5? Think there have been cases with similar symptoms of random disconnects where there was some resistance on the +5 line causing the keyboard to reset when drawing current.
Re: Anyone know where to source IDE cables like these In various lengths?
Posted on 2023-01-02, 15:31
This places claims to have some in 48cm and 90cm lengths: https://www.cabledepot.co.uk/ide-c-100_101.html You can get jacketed flat cable like this: https://www.farnell.com/datasheets/910926.pdf but the prices may cause a minor coughing fit.
Re: Repairing a specific LCD: Abit Guru Panel GP-02
Posted on 2022-12-21, 13:22
Found some pictures of one: Abit_Postman_FrontBack.jpg (just for the record, on this one the pinout colour order is the same at both ends). Looks like one sold on German Ebay in October this year (which is where I found the pictures). I guess the motherboard sends the POST codes out over the SMBus, …
Re: Repairing a specific LCD: Abit Guru Panel GP-02
Posted on 2022-12-20, 12:55
Wow! That's some Sherlock Holmes-level deduction you've done. I think i'll have to read your comment at least a couple of times to understand it, and get back to you. Sure, I can measure some resistances with the power off. That's safe stuff. More spinning a tale to try and fit what we know, then …
Re: Compaq Armada 1550DMT fun.
Posted on 2022-12-19, 10:18
Not sure. I think the table ought to be: BF1 BF0 (pins 185 and 186) 0 1 x3 0 0 x2.5 1 0 x2 1 1 x1.5 (default) but there's a note here: http://www.cpu-zone.com/Pentium/Pentium%20processor%20specification.pdf about a correction to the MMX datasheet regarding the x3 multiplier that This bus ratio is …
Re: Compaq Armada 1550DMT fun.
Posted on 2022-12-18, 23:02
I tried to raise FSB frequency above 66MHz by experimenting with the FSB option resistors, but to no avail. Most likely clock gen. does not support FSB frequency higher than 66MHz. Where you able to find the datasheet for the MK1491-01 to ID the FSB resistors? Out of curiousity I had a quick look …
Re: Repairing a specific LCD: Abit Guru Panel GP-02
Posted on 2022-12-18, 22:14
Nice. I'm going to make some wild guesses and then ask if you can make a few measurements to check. Assume that in that photo of the official connector that Red is +5, Black is Ground, White is Clock and Green is Data, and that both Clock and Data have a pull-up resistor connected to +5. From the …
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