| 1 |
45 |
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2010/11/22 - Fixed Video component, and increased vram to accommodate 80x40 resolution
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| 2 |
44 |
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- Developed the basic io libs for SDCC for Z80SoC: crt0.s, putchar.c and getchar.c
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| 3 |
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- ROM design has been implemented using coregen, and has now 16k
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| 4 |
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- ram size changed to 12Kb for S3E and 40Kb for DE1
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| 5 |
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- Slight changes in memory layout (see readme for memory layout)
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| 6 |
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- New rom developed in C (SDCC)
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| 7 |
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- Released C library for Z80SoC development usingg SDCC
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| 8 |
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| 9 |
45 |
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2010/02/26 - Modified RAM layout (again) to accommodate new features
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| 10 |
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- Characters pattern are now in RAM and can be redefined by the user
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| 11 |
44 |
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- Video screen can now be configured up tp 40 rows by 80 columns
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| 12 |
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- Characters can have double pixels (useful when width is less than 40 chars)
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| 13 |
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- Memory cores was redefined, RAM is now 24K
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| 14 |
45 |
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- Modified top module and video module to accommodate new memory cores
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| 15 |
44 |
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- ROM demo modified to demonstrate char definition (redefine char "A")
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| 16 |
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| 17 |
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2008/05/24 - Modified RAM layout to support new and future improvements
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| 18 |
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- Added port 0x90 to write a character to video.
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| 19 |
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- Cursor x,y automatically updated after writing to port 0x90
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| 20 |
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- Added port 0x91 for video cursor X
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| 21 |
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- Added port 0x92 for video cursor Y
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| 22 |
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- Added suport for reading VRAM (dual port, dual clock vram)
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| 23 |
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- Updated ROM to demonstrate how to use these new resources
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| 24 |
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- Changed ROM to support 14 bit addresses (16 Kb)
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| 25 |
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| 26 |
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2008/05/14 - Implemented small changes in Rotary knob logic.
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| 27 |
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- Modified ROM to demonstrate rotary function.
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| 28 |
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| 29 |
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2008/05/12 - Added support for the Rotary Knob
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| 30 |
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- Changed RESET to Knob push button. Now, the 4 push buttons are available for user applications.
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| 31 |
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| 32 |
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2008/05/11 - S3E: Fixed bug in memory access. Vram and ram working, so could release the same rom as DE1 port.
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| 33 |
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| 34 |
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2008/05/04 - Spartan 3E port released, although not 100% functional (see README)
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| 35 |
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| 36 |
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2008/05/01 - Added Caps lock support. Upper and lower case characters are now supported for keyboard input.
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| 37 |
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| 38 |
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2008/04/19 - Added complete character set support
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| 39 |
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- Modified the Z80 demo program format the screen output and input
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| 40 |
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| 41 |
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2008/04/16 - Release of Z80SoC-0.5-DE1-Beta
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| 42 |
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- Features:
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| 43 |
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- IO pins access by ports (7segdisplay, leds, switches, push buttons, gpio)
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| 44 |
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- 8 KB VRAM memory mapped
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| 45 |
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- 8 KB ROM
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| 46 |
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- 4 8KB SRAM
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| 47 |
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- Video 40 x 30 Uppercase and Numbers noly
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| 48 |
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- PS/2 keyboard input
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