diff options
Diffstat (limited to 'src/mame/drivers/poly88.cpp')
-rw-r--r-- | src/mame/drivers/poly88.cpp | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/mame/drivers/poly88.cpp b/src/mame/drivers/poly88.cpp index 1d3232bb06b..6ba6267499b 100644 --- a/src/mame/drivers/poly88.cpp +++ b/src/mame/drivers/poly88.cpp @@ -6,6 +6,24 @@ 18/05/2009 Initial implementation + Poly-88 ToDo: + MT 06231: Cassette saving hangs. Also, the system has different + formats depending on a switch. Only one format is currently + emulated. + + + Poly-8813 is a disk-based computer with 3 mini-floppy drives. + Booting is done by pressing the "Load" button, mounted on the + front panel near the power switch. Although user manuals are easy + to obtain, technical information and schematics are not. The bios + makes use of illegal instructions which we do not correctly emulate. + The first of these is at 0x006A (print a character routine), while + the other is at 0x0100 (an internal copy routine). The code at 0x100 + can be replaced by 7E 12 13 23 03 79 B0 C2 00 01 C9, which exactly + fits into the available space. The disk format is known to be + 256 bytes per sector, 10 sectors per track, 35 tracks, single sided, + for a total of 89600 bytes. + ****************************************************************************/ #include "emu.h" @@ -194,7 +212,7 @@ static MACHINE_CONFIG_START( poly88, poly88_state ) MCFG_I8251_RXRDY_HANDLER(WRITELINE(poly88_state,poly88_usart_rxready)) /* snapshot */ - MCFG_SNAPSHOT_ADD("snapshot", poly88_state, poly88, "img", 0) + MCFG_SNAPSHOT_ADD("snapshot", poly88_state, poly88, "img", 2) MACHINE_CONFIG_END static MACHINE_CONFIG_DERIVED( poly8813, poly88 ) |