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FPGAmstrad

27 bytes removed, 11:42, 20 July 2011
/* Second schematic RAM+VGA */
==== Second schematic RAM+VGA ====
With JavaCPC, when you do a snapshoot, and edit result file, you see that RAM content starting at a certain address.
 
Do "paper 2", "cls" on JavaCPC, the screen became RED, and then save a snapshoot, you can see that last part (from 0xC000 to 0xFFFF) had change from a lot of 0x00 into a lot of 0xFF
 
So last part of RAM is used for video (it's shown on Quasar [[http://quasar.cpcscene.com/doku.php]] and other legend website...)
For making my VGA module, I take a look at unix "modeline" command that give you all timing for VGA signals, and it run :)
After having a VGA module displaying a RED screen (yeah !), I made it scanning last part of RAM (from 0xC000 to 0xFFFF), and solved puzzle (RAM contain in fact line of 0xFF, finished by 0x00)
Line After having a VGA module displaying a RED screen (yeah !), I made it scanning last part of RAM (from 0xC000 to 0xFFFF), and I solved the puzzle. RAM contain lines of 0xFF, each finishing by 0x00, but lines are not in great order, and scroll crash, but it says hello x)
==== Third schematic Z80+ROM+RAM+VGA ====
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