#### Back to index | # Info for geneve

#### Myarc Geneve 9640

Known Issues:
Wait states are not emulated (except for the speech synthesizer), so the Geneve
will always run at full speed.
The keyboard does not seem to work properly in BHDMV.

Usage:
This driver emulates a Geneve with (almost) 2Mbytes of RAM, 4 floppy drives,
and a mouse. 3 Hard Disk are supported by the HFDC disk controller.
You need an MDOS disk image to boot the Geneve. Insert the image and run the
computer.

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 (expandable to 192 kbytes). 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.

Generated on Wed Jul 16 01:11:08 2003