minor dram_read optimizations
git-svn-id: svn://cu.loc/avr-cpm/trunk/avrcpm/avr@17
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z80.asm: added interrupt driven delay timer; used in BOOTWAIT and RAMTEST.
RAMTEST waits some seconds after fill to test refresh.
dram_read: time between "CAS low" and data input was too short. added one clock cycle.
git-svn-id: svn://cu.loc/avr-cpm/trunk/avrcpm/avr@12
57430480-672e-4586-8877-
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use lookup table for parity flag computation
as we now have the table, use it for sign and zero flag too
changed flags to 8080 behavior
DRAM read/write routines changed to use A8 to select low/high nibble.
added USART RX buffer with Interrupt
added timer routines
more magic number eliminations
git-svn-id: svn://cu.loc/avr-cpm/trunk/avrcpm/avr@6
57430480-672e-4586-8877-
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added Atmega8 support
added a Makefile
git-svn-id: svn://cu.loc/avr-cpm/trunk/avrcpm/avr@4
57430480-672e-4586-8877-
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added documantation improvements from Karl heinz Buchegger.
http://www.mikrocontroller.net/topic/177481?page=1#
1750788
git-svn-id: svn://cu.loc/avr-cpm/trunk/avrcpm/avr@3
57430480-672e-4586-8877-
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Initial import of the original source from Sprite_tm:
http://spritesmods.com/avrcpm/avrcpm-0.1.tgz
More information at http://spritesmods.com/?art=avrcpm
git-svn-id: svn://cu.loc/avr-cpm/trunk/avrcpm/avr@1
57430480-672e-4586-8877-
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