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lotharek

Member Since 19 Jul 2005
OFFLINE Last Active Aug 28 2011 2:58 PM

Posts I've Made

In Topic: SRAM - final..

Mon Aug 22, 2011 5:26 AM

of course above issue concern 576kb - 1088 kn no soldering or mods required

so, once again :

- if You want to have 1088 kb port b xmst - just plug and play
- if you want for some reasons microram to run in compy shop 576 kb mode, You have to:


* put jumper according to picture below
* if You have ATARI XEGS or ATARI 65XE without ECI (picture 917) that freddy`s pin 3 (extselect) is permament connected to 5V, cut the trace or desolder/lift pin up, connect pin 3 to 5v via 3k resistor and then conenct to BD3 at microram.

In Topic: SRAM - final..

Mon Aug 22, 2011 2:21 AM

Only three available pieces of microram has been posted to beta testers. Soon more info.

some additional info :


After placing microram into socket under cpu You should check following :

- freddy XE computers --- some of them has PERMAMENT 5v on EXTSELECT (pin 3 of freddy chip) --- THIS MAY BURN XILINX !!

So, desolder this pin form pcb, connect to 5v via resistor 4,7kohm and THEN connect to microram..

Final version of microram will have this bug corrected,


Ps,ALSO I HAVE DISCOVORED that some cpus like at picture attached may do some problems on NUMEN demo.. other soft works fine..strange. Probably 02 timng mod to pcb will solve the issue.


http://www.retrogame...stereo/cpug.jpg










ps. May I have please some examples of software that needs Antic mode 575kb of xmst ?

In Topic: SRAM - final..

Sun Aug 21, 2011 3:13 AM

I think, we could a have a deal - i will send You one microram for NTSC testing in plenty of Your machines. All I would expect is serious comments about module and it`s behaviour in different configuations.

that will be pre-production version of course, but will go any further without scroupultness tests from NTSC user.Of course, i think all suggestions should be posted here in that thread for future improvments

In Topic: SRAM - final..

Sat Aug 20, 2011 11:31 PM

STEREO PCBS -- pcb producer and design changed.
1 MB -- never said it will fit sockets.

anyway, small video of microram

http://www.mmj.pl/~l...am/microram.wmv

In Topic: 3 Atari 8-bit Hard Drive images for SDrive, etc.

Sat Aug 20, 2011 1:39 PM

You rock MAN !!!!!

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