flash rom help! — ZXNet «hardware.zx»

From skyther To All 16 August 2006

Hello, All People, help! I'm tired of this slush, you just start the pages switch - glitches appear (just 48 bass works). For example, GLUK6.1 is not draws a splash screen and ends up in BASIC; with grass512 and color test work fine :( :( :( Recommend something! I recorded it on the spec itself. I checked the CRC - it matches the emulator... I tried mikruhi: W29C020, W29EE010 and some other SST...

From skyther To All 16 August 2006

Hello, The Exploited Computer Leningrad-1, memory expanded to 256 (VMG-5). There are no condensers at all! After all, it somehow worked out?

From Mark Antonov To All 16 August 2006

Hello skyther what computer? Perhaps there is a time-critical capacitor somewhere...

From Mark Antonov To All 16 August 2006

Hello skyther flash drive address management scheme A14,A15... put it here =)

From skyther To All 17 August 2006

Hello, The Exploited The> address management scheme for flash drives A14,A15... drop it here =) The scheme is simple: A14 - on 7FFD, the rest on the ground. When flashing the firmware, I hooked it on port AY.

From Igor Afonkin To All 17 August 2006

Hello skyther sky> There are no Conders at all! But in vain! Try soldering more ceramic ones in different places on the power bus. And, Definitely ceramics to power the flash drive. Most likely glitches due to power supply.

From skyther To All 17 August 2006

Hello jdigreze I meant time-setting controllers. In terms of power supply, they are there, I’ll try to solder them some more.

From Mark Antonov To All 18 August 2006

Hello skyther sky> People, help! I'm tired of this shit, just start the pages sky> switch - there are glitches (just 48 bass works). For example sky> GLUK6.1 does not render the splash screen, but falls into BASIC; sky> The scheme is the simplest: A14 - on 7FFD, the rest on the ground. can the glitch even work without trdos??

From skyther To All 18 August 2006

Hello jdigreze The> can the glitch even work without trdos?? the description says that it can; I checked it in emulation now - it doesn’t work, but I flashed 128 BASIC - it doesn’t work either :( jdi> And how is /OE formed? 2 options: /RDROM (/CS on the ground) or /RD.Z80 (/CS=/ROM or /MRQ.Z80), result identical

From Igor Afonkin To All 18 August 2006

Hello, The Exploited And how is /OE formed?

From Igor Afonkin To All 19 August 2006

Hello skyther Idk... Try flashing all the flash drive banks with 48th firmware, even those that are not must be used. And see what happens when the regimes change via recording in 7FFD. If there is a glitch, then something is wrong in the circuit, more is needed dig in detail. If everything is “ok”, then you need to look at the arrangement of the cans in flash drive. PS: Don't you need to configure the flash drive? You may need to enable some linear reading mechanism, or something like that?

From Igor Afonkin To All 21 August 2006

Hello skyther Hmm... I don’t even know... Still try to re-read the official datasheets on flash drives, maybe you’ll really find something... And compare carefully signal diagrams with the same, but a regular EEPROM.

From skyther To All 18 September 2006

Hello jdigreze You can congratulate me, the flash drive is working :) The reason was garbage in nutrition - I soldered a kilogram of Conder and that’s it. Thanks to everyone who responded!