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1 Meg Super AMS Discussion Thread

TI-99/4A 1MEG SAMS AMS

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#201 RXB OFFLINE  

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Posted Mon Dec 26, 2016 12:25 PM

I can see a number of use cases for that, Rich. I also have a random question: which byte is written first? I ask this because the first byte written will be the one that is latched, and would be in the value range of >00 to >0F. I just wanted to make sure I have the byte data in the right order in my earlier post. . .

In my GPL Code I move just one byte into the Even Address to change a page:

ST   >0A,@>4014

 

Same thing you can do from XB:

CALL LOAD(16404,10) ! Or move >0A at mapper >4014)

 

Assembly has to move a word but GPL and XB do not need to do that.

Your change adds another value to make it a word as it has always been just a byte for me on SAMS.



#202 Sinphaltimus OFFLINE  

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Posted Sun Jan 15, 2017 11:09 AM

So what does a layman have to do to get a working preassemled card?

#203 Shift838 ONLINE  

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Posted Sun Jan 15, 2017 12:32 PM

So what does a layman have to do to get a working preassemled card?

 

Send a PM to Ksarul here on AA.



#204 Ksarul OFFLINE  

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Posted Sun Jan 15, 2017 8:21 PM

I have to order some more boards though, as I sold the last one from the first batch just before Christmas. . .I already planned to do that this weekend though, so I will have new boards in-hand in a few weeks.



#205 --- Ω --- OFFLINE  

--- Ω ---

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Posted Sun Jan 15, 2017 8:55 PM

So what does a layman have to do to get a working preassemled card?

 

This card is simply beautiful too.

 

gallery_35324_1027_2550399.jpg

 

Here is a photo of the "Grand Prize" drawing from last years TI Fest West, the card was donated by Jim (Ksarul).  



#206 ElectricLab OFFLINE  

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Posted Sun Jan 15, 2017 8:59 PM

 
This card is simply beautiful too.
 
gallery_35324_1027_2550399.jpg
 
Here is a photo of the "Grand Prize" drawing from last years TI Fest West, the card was donated by Jim (Ksarul).  


I agree, it's a work of art in more ways than one.
  • RXB likes this

#207 Iwantgames:) OFFLINE  

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Posted Sun Jan 15, 2017 11:17 PM

Awesome piece of tech, and Rasmus' new Dungeons of Asgard really makes it a must have item!

#208 --- Ω --- OFFLINE  

--- Ω ---

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Posted Sun Jan 15, 2017 11:20 PM

Awesome piece of tech, and Rasmus' new Dungeons of Asgard really makes it a must have item!

 

Hmmm, I've not been following that one...



#209 rootboy OFFLINE  

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Posted Wed Feb 1, 2017 6:52 PM

Anyone have the part numbers of the 512 Meg SRAM chips? Thanks!



#210 helocast OFFLINE  

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Posted Wed Feb 1, 2017 7:33 PM

Anyone have the part numbers of the 512 Meg SRAM chips? Thanks!

Manuf.# 628512LP-70 are the ones I ordered. https://www.jameco.c...PRmxrVULThlD5Fh



#211 rootboy OFFLINE  

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Posted Wed Feb 1, 2017 10:02 PM

Manuf.# 628512LP-70 are the ones I ordered. https://www.jameco.c...PRmxrVULThlD5Fh

Thanks!



#212 helocast OFFLINE  

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Posted Thu Feb 2, 2017 10:57 PM

One down; one to go. It's nice to work on a clean, new PCB as I really needed a break from consoles for a while =]

Attached Files



#213 klrw111-78 OFFLINE  

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Posted Wed Sep 13, 2017 2:34 PM

Just got my bare board last week and I ordered my parts for the SAMS based on the list under the board on ArcadeShopper.  While assembling the board, I notice that the 74LS04 and the 74LS688 have been replaced by 74LS34 and 74LS683.  Can someone explain the difference, please? 


Edited by klrw111-78, Wed Sep 13, 2017 2:47 PM.


#214 klrw111-78 OFFLINE  

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Posted Wed Sep 13, 2017 2:56 PM

Just got my bare board last week and I ordered my parts for the SAMS based on the list under the board on ArcadeShopper.  While assembling the board, I notice that the 74LS04 and the 74LS688 have been replaced by 74LS34 and 74LS683.  Can someone explain the difference, please? 

 

 

Sorry--- Just read the full thread and found the answer...



#215 klrw111-78 OFFLINE  

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Posted Thu Dec 21, 2017 3:11 PM

I was testing ICs for use on this card with a MiniPro TL-866.  I understand that the Minipro will not test three of the chips used on this card, but it should test the static ram chips.  My Minipro begins the process of checking the rams, but ends up giving a USB communications error 32 before finishing.  I have tried chips by Hitachi and Alliance and have the same issue with both.  I have installed the latest software and drivers.  Has anyone else experienced this issue?



#216 RickyDean OFFLINE  

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Posted Thu Dec 21, 2017 3:38 PM

I was testing ICs for use on this card with a MiniPro TL-866.  I understand that the Minipro will not test three of the chips used on this card, but it should test the static ram chips.  My Minipro begins the process of checking the rams, but ends up giving a USB communications error 32 before finishing.  I have tried chips by Hitachi and Alliance and have the same issue with both.  I have installed the latest software and drivers.  Has anyone else experienced this issue?

I can try to test a few and see if I get the error, I believe I have tested some bad  and good ones in the past (6 to 8 months ago) and they tested correctly.



#217 Ksarul OFFLINE  

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Posted Fri Dec 22, 2017 10:36 AM

I haven't had any problems in testing RAM for the 40 or so SAMS boards I built, but all of my RAM came directly from Mouser, so it wasn't an aftermarket purchase. For that matter, I never even had to run a chip test on one of them, as they all worked on initial installation (unlike some of the LS chips--I found about a dozen bad chips while building those boards, mostly LS612s).



#218 RickyDean OFFLINE  

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Posted Fri Dec 22, 2017 11:16 AM

I can try to test a few and see if I get the error, I believe I have tested some bad  and good ones in the past (6 to 8 months ago) and they tested correctly.

I tested ram on mine last night Hitachi  and moser 62256, no errors. Even the bad ones still tested bad :-D



#219 klrw111-78 OFFLINE  

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Posted Fri Dec 22, 2017 7:55 PM

Thanks guys.  I bought one set of SRAMS from Mouser and one from Jameco and get the same result for all four.  All 74 logic chips testable with the minpro checked ok.  I purchased all the chips except the LS612s from Mouser.  The 612s came from Quest Components (not off ebay).  







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