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* Added missing C400E boot image
* Removed unnecessary offset attribute
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* interpro: headless boot working
These fixes enable booting and CLIX installation on headless InterServe systems (InterPro systems without graphics) using a VT100 or VT220 compatible terminal on serial port 2 (0 for ip6000). It's now possible to install and boot CLIX on the ip6000 system, as this works around the issues with the incomplete graphics hardware support in the driver.
* interpro: tidy serial configuration, add missing control lines
* ioga: fix serial dma
* z80scc: update /WREQ when transmitter is enabled/disabled, use 0 for assert state of active low output
* softlist: added 60x0 CLIX root floppies
* z80scc: tidy (nw)
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Many changes, most notable end result is the ability to boot the "blue screen" rebuild floppy, and nearly booting CLIX (hangs trying to mount the filesystems).
Summary of changes:
* added a softlist
* refactored cpu/mmu memory access
* added alignment faults
* implemented most c400 instructions
* fixed wait instruction
* corrections to interpro driver
* removed broken forced interrupt handling
* added support for dma virtual addressing
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