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#### Myarc Geneve 9640

Known Issues:
Wait states are not emulated (except for the speech synthesizer), so the Geneve
will always run at full speed.
My-word will display garbage at start-up, but it will run fine afterwards.

Usage:
This driver emulates a Geneve with (almost) 2Mbytes of RAM, 4 floppy drives,
and a mouse. No Hard Disk is emulated yet.
You need an MDOS disk image to boot the Geneve. Insert the image and run the
computer.
Preliminary tests have shown that emulation seems to have a good level of
compatibility.

History and Trivia:
Myarc is known as the builder of several fine extension cards for the TI99.
They managed to remain in business for several years after TI abandonned its
TI99 series of computers in 1983, and, in 1987, they even introduced their
Geneve 9640 computer. The computer is a single card to be inserted in the TI
PEB as a replacement of the TI99 console. The card has standard connectors to
attach a PC-XT keyboard and a monitor, but no other I/O ports, as the Geneve
relies on expansion cards in the PEB to provide disk and RS232 interfaces. The
Geneve features a TMS9995 at 12MHz, a V9938 VDP, an SN76496 sound generator
(compatible with TMS9919), a MM58274 RTC, 512 kbytes of 1-wait-state CPU RAM
(expandable to almost 2 Mbytes), 32 kbytes of 0-wait-state CPU RAM (expandable
to 64 kbytes), and 128 kbytes of VRAM. Thanks to the GenMod modification, the
512 kbytes of on-board RAM can be disabled so that 0-wait-state RAM may be used
instead, but this breaks the TI99 emulation mode.
Although the Geneve is compatible with the TI99, it is a different machine. It
has a disk-based Operating System that looks like MS-DOS. It has two operating
modes: a native mode, and a TI99-compatible mode. The TI99 mode is normally
entered by running the GPL program: the Geneve can run most TI99 programs in
this mode, which uses some special areas of CPU RAM to emulate GROMs and
cartridge ROMs.

created on Mon May 19 14:44:27 2003