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(MESS) Random acts of documentation (nw)

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This commit is contained in:
R. Belmont 2013-05-12 21:09:04 +00:00
parent b690521bb2
commit ee2a3a907e
1 changed files with 18 additions and 3 deletions
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21
src/mess/drivers/ts802.c
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@ -7,14 +7,20 @@
TODO:
- Everything - this is just a skeleton
Technical manual at:
http://bitsavers.org/pdf/televideo/TS800A_TS802_TS802H_Maintenance_Manual_1982.pdf
includes in-depth discussion of the inner workings of the WD1000 HDD controller.
****************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/terminal.h"
#include "machine/z80dma.h"
#include "machine/z80ctc.h"
#include "machine/z80sio.h"
class ts802_state : public driver_device
{
@ -43,10 +49,19 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START(ts802_io, AS_IO, 8, ts802_state)
//ADDRESS_MAP_UNMAP_HIGH
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0x00, 0x00) AM_READ(port00_r)
AM_RANGE(0x00, 0x00) AM_READ(port00_r) // DIP switches
// 04 - written once after OS boot to bank in RAM from 0000-3FFF instead of ROM. 4000-FFFF is always RAM.
// 08-0B: Z80 CTC
// 0C-0F: Z80 SIO #1
AM_RANGE(0x0d, 0x0d) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write)
AM_RANGE(0x0f, 0x0f) AM_READ(port0f_r)
// 10: Z80 DMA
// 14-17: WD 1793
// 18: floppy misc.
// 20-23: Z80 SIO #2
AM_RANGE(0x20, 0x20) AM_WRITENOP
// 48-4F: WD1000 harddisk controller
// 80: LEDs
ADDRESS_MAP_END