Re: SIPP Memory Orientation
Posted on 2019-02-04, 23:04
Look at the datasheet of the RAM chips on the board. They should share some signals, addresses, WE, for example. From this you could find out where to paint the pin 1 dot on the mobo.
Re: SIPP Memory Orientation
Posted on 2019-02-04, 22:53
Aren't the module's pinouts the same? Afaiu SIPP were actually SIMM with pins attached, for enabling socket-free permanent soldering. Look at the board, it has already both holes for the SIMM socket fasteners. But to be safe, consult manuals and datasheets and verify that pinouts are actually …
Re: Fixing "Bad Cluster" ?
Posted on 2019-02-04, 22:47
I am afraid, no. Iirc, the bad sector is in a cluster, and unless the cluster size is same as sector size, the whole cluster becomes invalid. If the drive already supports SMART, let it have a long destructive test to map out bad sectors.
Re: Maxing Intel P45 memory
Posted on 2019-02-04, 15:43
It's just fun and crazy with DDR2. I recently bought 16GB (4x 4GB) PC2-5300F for 5 euros. But if you need the (originally cheaper) unbuffered consumer version, you'll have to pay dearly. Another general note regarding memories: I would advise to absolutely avoid brands like OCZ and Corsair, which …
Re: My ongoing 386 build (or: The Disasterpiece)
Posted on 2019-02-04, 15:26
It was mainly the SMD position that made me wonder, but having that would make sense for OEM stuff too. Same PCB, some boards destined to get an SMD 386, others getting the socket In that transition phase, the SMD versions of the processors often were not available in quantities at the beginning. …
Re: Need help with a XT clone mainboard
Posted on 2019-02-04, 00:54
Trouble is, they are one-time programmable so you need to be extra sure you have the right file. Best way to go about it is to borrow one from a fellow nerd that has the same board and dump the contents. I think the OP could be lucky using a translator and ask on Russian vintage boards forums. I …
Re: My ongoing 386 build (or: The Disasterpiece)
Posted on 2019-02-04, 00:36
I doubt this is an industrial board. It looks like a normal PC mobo to me. Yes, the 90s saw a great spread of machines. It was a different time. The 9324 datestamp in the middle of the image gives proof that this is a low-end 1993/94 mobo. If you want to see an industrial AT/ISA mobo, for example …
Re: Need help with a XT clone mainboard
Posted on 2019-02-03, 22:36
or the PROMs you're going to have a hard time unless you have a file with what's supposed to be on it and a programmer that can handle one of these. These old PROMs often use very high programming voltages that more modern programmers can't handle. That is, if you manage to obtain old stock... …
Re: Need help with a XT clone mainboard
Posted on 2019-02-03, 14:51
@computerguy I don't understand the purpose of the table you did with the multimeter. The schematic tells it all. What you need, respective have to create is a set of truth tables, which needs intense consultation of the according hardware manuals and data sheets. If you don't know what a truth …
Re: Creating wrappers for older Mac OS X games
Posted on 2019-02-03, 14:31
If anyone is still interested I am happy to write up a step-by-step guide and post it here. To be honest, I could do with some help to perfect the process. While it works great for my iMac with a 2560x1440 resolution, I find the main weakness with this approach is not having the ability to make the …
Re: SeaTools/Ontrack/BIOS Hard Drive Issue
Posted on 2019-02-03, 03:01
Amazing. Back then I wondered who used Ontrack. It was so crappy. Introduced many problems, like you describe. Maybe you use it because it was included with many things, just like the AOL CDs? There are quite some alternatives. SpeedStor, PartitionMagic etc, every one is better than Ontrack. Or …
Re: Thinkpad A20m - what should I do with it
Posted on 2019-02-02, 21:35
keenmaster486 wrote: I can use the floppy drive to transfer files back and forth between the Thinkpad and my Toshiba DOS laptop. why not use Intersvr/Interlnk or good old LapLink?
Re: Would you Retrobright?
Posted on 2019-02-02, 19:24
I just disassemble the plastic parts and clean them like a dishwasher in hot water. Staining residues (smoker condensates etc) are removed effectively. But also consider the effects of lighting. With lower color temperature the staining becomes more apparent. With an illumination of 3000K GE/Philips …
Re: Need help with a XT clone mainboard
Posted on 2019-02-02, 18:49
U31 creates the bus signals from the processor pins. U42 does the address decoding. Every one of both is critical. Without them, no ROM will ever get a CS signal. The logic is not complicated. it was described en detail in the Intel and AMD 8086/88 handbooks. Each one more than 1000 pages.
Re: ICL 386DX 25 MHz - should I keep it?
Posted on 2019-02-02, 15:33
Another case of fake cache? nope , these old DX25 systems simply did not have the option for cache. My Hyundai one was from 1988 or something - pretty expensive back then I imagine That depended on the mobo. For example, back then in the second half of the 1980s, a friend of mine got a 16MHz 386 …
Re: ICL 386DX 25 MHz - should I keep it?
Posted on 2019-02-02, 14:12
Damn, this is an outstanding machine! Real connoissoirs appreciate this: - C&T chipset (by far the best one at that time) - Full AMI bios setup. You can even fiddle with the chipset registers. - 5150 class heavy high quality case. - who knows about computer history knows ICL, their quality and their …
Re: Great Accessories for building Retro PCs
Posted on 2019-02-02, 03:56
Few of you have ever used desolderers used in the industry back then. Hollow soldering iron, heavy like a 250W iron, big mass to store the heat, and strong recoilless vacuum derived from the factory's pressurized air. Putting the hollow desoldering iron over the pin, the whole leaded tin was liquid …
Re: What retro activity did you get up to today?
Posted on 2019-02-02, 03:11
I deactivated the temperature controlled ventilation in my Mac to extend its life.
Re: how to remove scratches from vintage microsoft mouse
Posted on 2019-02-02, 02:15
I have a few of these mice and they are the best. But, the buttons have lost their click point. Need to replace them. Now I am puzzled... any idea how to open the mouse?
Re: SCSI heat and vibrations! What have people done with this issue?
Posted on 2019-02-02, 01:41
Last weekend I installed a Seagate 10k 36GB drive into my G3 beige tower. Sound and vibes were great :D I liked that feeling of a 1970s hard disk enclosure. But the drive got HOT. Range ca. 55-65 centigrades. Not good! For this reason I deactivated thermal fan regulation by tampering a bit in the …
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