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Rev 14	Rev 18
Line 1...	Line 1...
`Z80 Computer on Spartan 3E Starter Kit`	`Z80 Computer on Spartan 3E Starter Kit`

`Arquitecture`	`Arquitecture`
`------------`	`------------`

	`Button West (left) - Reserved - Reset`
`SW3 - Reserved - Reset`

`Memory`	`Memory`
`------`	`------`
`0000H - 01FFH - ROM (0 - 8191)`	`0000H - 01FFH - ROM (0 - 8191)`
`2000H - 27FFH - VIDEO RAM (8192 - 10239)`	`2000H - 27FFH - VIDEO RAM (8192 - 10239)`
`3FE0H - 3FFFH - LCD Video RAM (16352 - 16383)`	`3FE0H - 3FFFH - LCD Video RAM (16352 - 16383)`
	`4000H - 7FFFH - RAM memory (16384 - 32763)`

`IO`	`IO`
`--`	`--`

`Output Ports`	`Output Ports`
Line 23...	Line 23...
`------`	`------`
`20H - SW(3-0)`	`20H - SW(3-0)`

`30H - KEY(3-0)`	`30H - KEY(3-0)`

`LCD`
`---`
`3FE0H - 3FFFh - LCD video memory (32 characters)`

`Video`
`-----`
`2000H - 27FFH - Video RAM Memory`

`Keyboard`	`Keyboard`
`--------`	`--------`
`80H - Read Keyboard Ascii code`	`80H - Read Keyboard Ascii code`

`--`	`--`
Line 53...	Line 45...
`PS/2 keyboard`	`PS/2 keyboard`
`Video text out`	`Video text out`
`Leds`	`Leds`
`LCD`	`LCD`

`The ROM provided will wait for key East of the S3E to proceed.`	`The program starts waiting for keys to be typed in the keyboard.`
`Then, will show the keys type in the keyboard on the second line of the LCD.`	`The characters are shown on the 40x30 video (VGA).`
`The Switches will be displayed in the LEDS when a key is pressed in the keyboard.`	`If "A" is pressed, then the program starts another routine,`
	`that will write bytes into RAM. After 255 bytes are written,`
`Key West on the S3E will reset the system.`	`the bytes are read sequencially and the byte read displayed in the leds (binary format).`
	`When finished, waits for KEY0 (East on S3E board) and then restart again.`

	`The switches (4-0) are used as input to calculate delays. Try`
	`changing these switches to speed up ou slow down the leds. It only`
	`takes effect after a Z80 reset.`
	`To reset the Z80, use Key West (left push button).`

`Hope you enjoy.`	`Hope you enjoy.`


`Bugs`	`Bugs`

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[/] [z80soc/] [branches/] [RonivonCosta/] [doc/] [README-S3E.txt] - Diff between revs 14 and 18