Author
| Sanyo WAVY70FD RAM upgrade
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SeD_NcL
msx lover
Posts: 83 |  Posted: October 28 2004, 06:55 |
The Wavy 35 is without a diskdrive...
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Repair-Bas
msx addict
Posts: 383 | Posted: October 28 2004, 07:12 |
The worst what you can do is desolder the chips.
You can damage the PCB, and that is the only part what you cannot replace.
I use a 50 W solder-station.
and a 75 W desolder-station
It is very important to use a solder-station and not a solder-iron.
And I am very sure that it is impossible to extend the computer to 512 kB without any other changes, bacause the ram-chips don't fit in places of the normal 64 kB ram.
It is very easy to extend the computer to 128 kB
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dhau
msx master
Posts: 1056 | Posted: October 28 2004, 15:37 |
I use Solomon SL-20 soldering station (grounded, low voltage, regulated 50-300c), and I never had issues desoldering components
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POISONIC
msx professional
Posts: 883 | Posted: October 28 2004, 17:49 |
well i did not no abouth a converter print :?
does any one has a sceme of that converter print then?
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Repair-Bas
msx addict
Posts: 383 | Posted: October 28 2004, 18:50 |
You can see on the photos from msxposse that under the chips is an extra pcb.
The prints were homemade and inverted by Digital KC.
I used it a lot of times, but now I am out of those pcb's
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POISONIC
msx professional
Posts: 883 | Posted: October 28 2004, 19:17 |
ok
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Alexandre_Taito
msx freak
Posts: 183 | Posted: March 09 2006, 02:51 |
Did it on a 70FD2. I'll publish the tutorial and like later in www.tabajara-labs.com.br (the article will be in Portuguese, but I'd love someone who speaks english, translate it to me. Unfortunately I'm short on free time)
It is easy, but involves making a small board to fit the 4 x 44256 RAMs. |
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HansO
msx addict
Posts: 375 | Posted: March 09 2006, 08:13 |
Quote:
| Did it on a 70FD2. I'll publish the tutorial and like later in www.tabajara-labs.com.br (the article will be in Portuguese, but I'd love someone who speaks english, translate it to me. Unfortunately I'm short on free time)
It is easy, but involves making a small board to fit the 4 x 44256 RAMs.
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I can help with the english. |
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Alexandre_Taito
msx freak
Posts: 183 | Posted: March 09 2006, 11:17 |
HansO, do you speak portuguese?  Never would imagine that  |
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dhau
msx master
Posts: 1056 | Posted: March 10 2006, 04:20 |
I upgraded my Wavy 35J about a year and a half ago. Wasn't any harder then WX/WSX/FX upgrade. Just need two wires from MSX engine for extra address lines and stick four DRAM chips on a small PCB. I used wire from old 40-pin IDE cable, trying to keep it as short as possible. Works really well.
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HansO
msx addict
Posts: 375 | Posted: March 12 2006, 10:45 |
Quote:
| HansO, do you speak portuguese? Never would imagine that
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I can decipher most of written portugese. Dont ask me to speak or write in portugese! |
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Alexandre_Taito
msx freak
Posts: 183 | Posted: March 12 2006, 17:05 |
So feel free to take a look at the msx section on my page and do whatever you want, I hope to have the Sanyo ram upgrade article online tonight.
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Alexandre_Taito
msx freak
Posts: 183 | Posted: March 18 2006, 21:15 |
Done. http://www.tabajara-labs.com.br with a complete tutorial to upgrade the Wavy (and other MSXs with the T9769 chip) to 512K mapper ram. It is only in portuguese, if someone translate it to english drop me a mail. |
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ibanezman1990
msx user
Posts: 40 | Posted: March 19 2006, 14:53 |
Jes me too  |
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novi^skt
msx friend
Posts: 7 | Posted: April 14 2007, 12:23 |
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