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Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

Unfortunately my card currently refueses to work. The RAM get very hot and nothing is detected. On the back there seems to be some kind of factory repair. All of the chips get hot? These are NMOS but not that power-hungry, datasheet says each chip is about 30mW in standby. Perhaps the driving logic …

Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

The card uses some very special RAM modules I have never seen before. On the top there is a normal 30-pin SIMM for comparision. IMG_9210r.jpg NEC MC-41256A4A-15 8632KD NEC MC-41256A5A-12 8625KD Unfortunately my card currently refueses to work. The RAM get very hot and nothing is detected. On the …

Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

Back to topic...next card I got is a NCR one. Its is labeled NCR -85 017-0035806 ASSY 017-0035447 D SCHM 017-0035448 B IMG_9207r.jpg IMG_9208r.jpg User GuillermoXT from dosreloaded.de owns this card, too. He uploaded a manual. https://dosreloaded.de/forum/index.php?thread/3489-tandon-target-40-286- …

Re: ISA XMS/EMS Memory Extension / Expansion cards: Now Running without Driver / Documentation :-)

No, the RAM is not copied/transferred to another location, therefore there is no DMA. These cards are intended for use in 286 systems. There are usually other bottlenecks than the speed of the XMS. But yes, these cards are slow. You can already see in in the POST screen when RAM counts. The 1st part …

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