An implementation of the National Semiconductor DP8510 BITBLT Processing Unit. This is used on the InterPro GT family graphics boards, and this implementation seems to be correct enough to enable me to progress there, hence the PR. While I'd love to have another system to test against, I'm not aware of any other systems that ever used this device other than some NatSemi reference designs, which are not (yet) in MAME.
Disassemblers are now independant classes. Not only the code is
cleaner, but unidasm has access to all the cpu cores again. The
interface to the disassembly method has changed from byte buffers to
objects that give a result to read methods. This also adds support
for lfsr and/or paged PCs.
Implementation of 28F010 and family flash memory devices. These are not compatible with the JEDEC-standard flash command protocol implemented in intelfsh.
* Don't use device_serial_interface for transmit - it can't support sync modes, on-the-fly register updates, and other weirdness.
* Better modelling of 1-deep transmit queue.
* Better RTS/CTS behaviour.
* Completely overhauled interrupt logic - vectors should be correct for most async modes.
* Implemented different auto-reset receive errors in MPSC vs SIO.
* Implemented SDLC transmission including bit stuffing, transmit CRC, abort, and underrun/end-of-message behaviour.
Added an SDLC consumer device that logs SNA frame headers and data.
The analogue joystick is now emulated. Also fixed a few minor issues
with the memory map.
This also adds a generic Z80 dasisy chain device, for use in drivers
with non-Z80 peripherals.
Use "mame einstein -pipe tk02" to attach the 80 column device.
* Removed no longer needed einstei2 driver
* Added cursor rendering to the 80 column device
* Added support for the alternate character set (use dip switch to
change)
* Cleaned up and added save state support to the 80 column device
* added basic support for the system bus variously referred to as SR, SR bus, SRX and CBUS
* added an initial GT graphics card implementation, only supports the video ram and ramdac for now, but sufficient to boot the diagnostic monitor in graphics mode
* added a high-level emulation of the InterPro keyboard
protection handled etc. written from scratch based on notes from Kevtris and Peter
banking in the slot system seems somewhat archaic compared to proper modern banking, but this is how all other drivers I saw using slot roms did it.
