Ampliación RAM Camputers Lynx 48K a 96K. Ram Expansion

[ron]

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Pete !

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[ron]

JL, cuando lo tengas claro, a ver si nos dejas un pequeño tuto !!!

Me das mucha envidia de reyes, el próximo a ampliar, el mío !!!

[Peter Todd]

Y A Y !!!



Welcome to 96 land



"Dans" ROM is actually a DANISH ROM from the Danish user groups.

It has extra commands for fast screen display and other things - Ill check the docs (such as there are).


BRILLIANT NEWS!

[jltursan]

Ive tested the danish ROM and indeed, it has a faster display as it sets up a green-only startup screen. It shows also a different cursor, I havent found anymore differences yet . That docs would be great!

Ive figured out how to work with the extra sound commands, they only need the prefix EXT to be invoked:

Código: Seleccionar todo

EXT EXPLODE
EXT KLAXON
EXT LASER
EXT ZAP


Still trying to get something useful from the extra data RAM commands (STORE, FECTH, BACK, etc.)...

@Ron: Sí, aunque la información ya está toda a la vista, lo compactaré un poco. De momento corregiré lo de los condensadores rotos y miraré a ver si pruebo una fuente más potente. Si no consigo resolver lo de los temblores, me temo que el tema se estancará ahí, mis conocimientos no dan para más

[Peter Todd]

try to do this


ext fast 2

Fast x is different colors of fast



EXT cat x - is for external eprom board , like a DIR for memory



MULTI x , is for running up to 6 basic programs at the same time



ext recover ????, is for recovering from command "new" or quick power off and power on

ext vars shows your variables


This ROM was tailored to the Danish group - it also contains code for Danish characters and a relocate for the keyboard layout.


In Danish EPROM 3 memory is used like this - counting the 2 first ROMs adresss into this , so starting from &0000


all values are hex


4000 - 5000 , that is the last 4K of LYNX 96K basic



5000 - 5041 INIT routine



5042 - 52ff FREE for use



5300 - 5380 ROM Read , for reading eproms in the eprom burner



53d0 - 5402 Variables - going together with NEW DIMENSIONS

5405 - 543b Arrays - going together with NEW DIMENSIONS

5440 - 5472 Strings - going together with NEW DIMENSIONS



5475 - 547e vars + arrays + strings calling all 3 one after the other



5480 - 5502 FAST FAST LISTING - it will all be rewritten in english



.

.

.

.



5780 - 57cf MULTI BASIC


there is also RECOVER and



ALARM

TIMER

?RUL

?RULOFF

?ULON

but I havent figured out the syntax yet and the docs must be translated from Danish.

[weirdocollector]

Ive checked my PCB and another 48K v3 schematics (I suppose that v3 will be close enough to v2, my own PCB) and heres what Ive found:

Lynx 48K v3 schematics:


My PCB (v2):


As you must guess, LK1 is closed and LK2 (middle) has both lower links closed. Ive checked continuity and they indeed provide +5V and +12V as they are now.

The 96K configuration must be:


Red lines are cutting marks and green lines means a closed link. Is it correct?

As the 4116 are already mounted in sockets I only need to replace them with 4164 ICs

The ROMs (IC45 & IC46) are already the Lynx96K versions. Ive compared them with Pales ROMs and they are equal except a padding byte in one of them

Hola a todos !

No se ve la imagen con la configuración del los link (la tercera): es posible recuperar el file ?

Muchas Gracias !

[jltursan]

Hola weirdo!, en cuanto pueda te recupero las imágenes, que ahora mismo no tengo el PC a mano (escribo desde una orange pi )

[kokkiklhs]

Hello everyone, new member from Greece here...
Excuse me for using English, I can understand Spanish, but not able to write much...
Well, I recently purchased a Lynx 48 and I have a few questions about this upgrade:
a) My machine came without PSU, but it's complete and supposedly working. Once I upgrade to 96k, will I still need the -5VDC and 12VDC to run the Lynx, or simply +5VDC will be enough to feed the computer''s whole circuitry?
b) I am confused, hence my previous question. Will 4116 DRAMs remain still after the upgrade inside the Lynx? In that case, I suppose that all 3 different voltages will still be needed. Can somebody, PLEASE, explain the whole 48 to 96 upgrade procedure step-by-step, with a couple of photos, if possible?
c) I read about some SPLYNX conversion, and I have seen a scan of an old printed paper, with some very brief instructions, and at least one of the procedure steps missing (due to bad print, or something...)
What exactly is this SPLYNX modification?
IIRC there are some Spectrum converted games to run on SPLYNX modified machines (or on ANY Lynx machine, didn't understand well), which exactly are them and where can they be found?

Thanks, lads, cheers from Greece!!

[jltursan]

Hi and welcome to the forum!

a) You need all the voltages; as you say, 4116 IC are still present, so no changes in the PSU.
b) The procedure to upgrade to 96KB is simple:
1. Replace all 4116 of the lower left bank for 4164 ICs
2. Check the jumpers in the far left side of the ICs and cut red lines + link green ones:



You can check it for yourself, LK2 jumpers give you (in the original config) +5V and +12V and LK1 gives -5V. This is the schematic info:



3. Add Lynx 96KB ROMs, you can find it everywhere from an emulator. I can check for my own roms if you need them...

Let us know how it goes

EDIT: Apart from the ROM in this thread and following Ron's suggestion, you can find more of them here: http://elborg.dk/L-Eproms.html

[ron]

Haven't you considered the ROMs update ?
It's a good moment to do it.
Regards

[kokkiklhs]

Gee, thank you very much!!!
So it's really more simple than I thought! I won't do the upgrade right now, as I don't have a PSU but I will build one in the near future, using a simple ATX...

How about Splynx? What exactly is it?

[jltursan]

I don't really know the details of SPLynx. As you have already found, the step 4 is missing and I've never found the original. I'm sure Pete Todd could give you a proper explanation and even fill the gap of the mod; but he hasn't been in the forum for a long time. Hope he's well...

[kokkiklhs]

I hope so, too...
So, we'll have to wait until Pete visits the forum again, meanwhile there are a lot of retro-projects to be finished, so the Lynx will stay at the corner for a while...

[garillete]

http://retrowiki.es/viewtopic.php?f=31&t=200036276