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[/] [sdram_controller/] - Rev 17

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17 When I moved the z80 callstack pointer into SDRAM from onchip SRAM,
very hilarious things started to happen. This removes the hilarity and
restores the previous somber mood. Depending on your own design you
may or may not want to update to this revision		 lynn0p 5354d 03h /sdram_controller/
16 Removed a redundant cap_en lynn0p 5356d 08h /sdram_controller/
15 - Adding a convenience project for building the testbench.
- Must have ISE 11.1 or higher and project is targeted at device type
xc3s500e-4fg320
- Pinouts may be incorrect for other board types. It is your
responsibility to check. Incorrect pinouts can lead to device damage.		 lynn0p 5357d 01h /sdram_controller/
14 Changed the clock period in the DCM generic to match 50mhz lynn0p 5357d 04h /sdram_controller/
13 Updated the top level testbench to reflect the fact that you need an
external DCM to run the controller with now.		 lynn0p 5357d 05h /sdram_controller/
12 1. rolled write recover clocks back to previous value and edited comments
2. increased 200us wait time to 300us in the init module		 lynn0p 5366d 09h /sdram_controller/
11 consolidated capture into one process and added comments lynn0p 5367d 05h /sdram_controller/
10 Fixes to more glitches uncovered during testing with my T80 SoC. Some
ops were getting dropped on the floor when the controller needed to do
an auto refresh.		 lynn0p 5367d 09h /sdram_controller/
9 Got rid of some redundant busy_n <= '0' statements lynn0p 5368d 21h /sdram_controller/
8 Changes made to integrate and test with my homebrew SoC design.

1. One DCM has been removed. Now requires a 100mhz clock fed in. Only
consumes one DCM, if you can find a 100mhz clock somewhere.
2. Small timing modifications to fix memory glitches between controller
and the t80 soft cpu I'm using.		 lynn0p 5368d 21h /sdram_controller/
7 Reformatted the comments so they fit in 80 columns lynn0p 5377d 02h /sdram_controller/
6 changes to reduce synthesizer warnings, removed unused signals, etc. lynn0p 5377d 06h /sdram_controller/
5 added header file for ddr.v lynn0p 5378d 02h /sdram_controller/
4 added testbench files to trunk lynn0p 5378d 02h /sdram_controller/
3 adding LGPLv3 license file lynn0p 5378d 03h /sdram_controller/
2 initial checkin lynn0p 5378d 03h /sdram_controller/
1 The project was created and the structure was created root 5378d 06h /sdram_controller/

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