Z80 Computer on Spartan 3E Starter Kit
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Z80 Computer on Spartan 3E Starter Kit
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Arquitecture
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Arquitecture
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Button West (left) - Reserved - Reset
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Button West (left) - Reserved - Reset
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Memory
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Memory
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0000H - 01FFH - ROM (0 - 8191)
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0000H - 01FFH - ROM (0 - 8191)
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2000H - 27FFH - VIDEO RAM (8192 - 10239)
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2000H - 27FFH - VIDEO RAM (8192 - 10239)
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3FE0H - 3FFFH - LCD Video RAM (16352 - 16383)
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3FE0H - 3FFFH - LCD Video RAM (16352 - 16383)
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4000H - 7FFFH - RAM memory (16384 - 32763)
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4000H - 7FFFH - RAM memory (16384 - 32763)
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IO
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IO
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--
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--
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Output Ports
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Output Ports
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01H - Green Leds (7-0)
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01H - Green Leds (7-0)
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Inputs
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Inputs
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20H - SW(3-0)
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20H - SW(3-0)
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30H - KEY(3-0)
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30H - KEY(3-0)
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Keyboard
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Keyboard
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--------
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--------
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80H - Read Keyboard Ascii code
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80H - Read Keyboard Ascii code
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--
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--
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Reference Sample ROM
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Reference Sample ROM
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It is provided a ROM with a reference application, and the correspnding
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It is provided a ROM with a reference application, and the correspnding
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Z80 source codes.
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Z80 source codes.
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To use the application you will need to connect the S3E board to a
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To use the application you will need to connect the S3E board to a
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VGA monitor and PS/2 keyboard.
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VGA monitor and PS/2 keyboard.
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The program will show how to use:
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The program will show how to use:
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Input push buttons
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Input push buttons
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Input Switches
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Input Switches
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PS/2 keyboard
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PS/2 keyboard
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Video text out
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Video text out
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Leds
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Leds
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LCD
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LCD
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The program starts waiting for keys to be typed in the keyboard.
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The program starts waiting for keys to be typed in the keyboard.
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The characters are shown on the 40x30 video (VGA).
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The characters are shown on the 40x30 video (VGA).
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If "A" is pressed, then the program starts another routine,
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If "A" is pressed, then the program starts another routine,
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that will write bytes into RAM. After 255 bytes are written,
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that will write bytes into RAM. After 255 bytes are written,
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the bytes are read sequencially and the byte read displayed in the leds (binary format).
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the bytes are read sequencially and the byte read displayed in the leds (binary format).
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When finished, waits for KEY0 (East on S3E board) and then restart again.
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When finished, waits for KEY0 (East on S3E board) and then restart again.
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The switches (4-0) are used as input to calculate delays. Try
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The switches (4-0) are used as input to calculate delays. Try
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changing these switches to speed up ou slow down the leds. It only
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changing these switches to speed up ou slow down the leds. It only
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takes effect after a Z80 reset.
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takes effect after a Z80 reset.
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To reset the Z80, use Key West (left push button).
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To reset the Z80, use Key West (left push button).
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Hope you enjoy.
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Hope you enjoy.
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Bugs
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Bugs
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- Z80 programs that have loops using registers HL, DE, BC are not working. This happens only with S3E port. The DE1 version is working 100% what concerns to z80 programs.
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- Z80 programs that have loops using registers HL, DE, BC are not working. This happens only with S3E port. The DE1 version is working 100% what concerns to z80 programs.
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TO-DO:
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TO-DO:
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----
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----
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- 80x40 Video display
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- 80x40 Video display
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- Serial communication
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- Serial communication
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- Monitor program to allow download of programs by serial communication
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- Monitor program to allow download of programs by serial communication
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- Mass storage device (SD/MMC)
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- Mass storage device (SD/MMC)
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