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[/] [sdram_controller/] [trunk/] - Rev 21

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21 1. Updated testbench to reflect lack of en signal
2. Deleted tarball and replaced it with a project file
and user constraints file		 lynn0p 5351d 01h /sdram_controller/trunk/
20 Got rid of the en signal, minor changes to eliminate synthesizer warnings. lynn0p 5352d 21h /sdram_controller/trunk/
19 Fix for the transparent latch warning. Z80 call stack pointer test code
still works.		 lynn0p 5352d 22h /sdram_controller/trunk/
18 Forgot to update the comments lynn0p 5354d 01h /sdram_controller/trunk/
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 01h /sdram_controller/trunk/
16 Removed a redundant cap_en lynn0p 5356d 06h /sdram_controller/trunk/
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 5356d 23h /sdram_controller/trunk/
14 Changed the clock period in the DCM generic to match 50mhz lynn0p 5357d 02h /sdram_controller/trunk/
13 Updated the top level testbench to reflect the fact that you need an
external DCM to run the controller with now.		 lynn0p 5357d 03h /sdram_controller/trunk/
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 07h /sdram_controller/trunk/
11 consolidated capture into one process and added comments lynn0p 5367d 03h /sdram_controller/trunk/
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 07h /sdram_controller/trunk/
9 Got rid of some redundant busy_n <= '0' statements lynn0p 5368d 19h /sdram_controller/trunk/
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 19h /sdram_controller/trunk/
7 Reformatted the comments so they fit in 80 columns lynn0p 5377d 00h /sdram_controller/trunk/
6 changes to reduce synthesizer warnings, removed unused signals, etc. lynn0p 5377d 04h /sdram_controller/trunk/
5 added header file for ddr.v lynn0p 5378d 00h /sdram_controller/trunk/
4 added testbench files to trunk lynn0p 5378d 00h /sdram_controller/trunk/
3 adding LGPLv3 license file lynn0p 5378d 01h /sdram_controller/trunk/
2 initial checkin lynn0p 5378d 01h /sdram_controller/trunk/

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