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Pencil2 : added notes

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Robbbert 2012-12-24 11:47:54 +00:00
parent 6a0688877b
commit f18889854c
1 changed files with 49 additions and 2 deletions
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51
src/mess/drivers/pencil2.c
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@ -9,6 +9,52 @@
- Everything - this is just a skeleton
Information found by looking inside the computer
------------------------------------------------
Main Board PEN-002 11-50332-10
J1 Expansion slot
J2 Cart slot
J3 Memory expansion slot
J4 Printer slot
XTAL 10.738 MHz
U1 uPD780C-1 (Z80A)
U2 Video chip with heatsink stuck on top, possibly TMS9928
U3 SN76489AN
U4 2764 bios rom
U5 uPD4016C-2 (assumed to be equivalent of 6116 2K x 8bit static RAM)
U6 74LS04
U7 74LS74A
U8-10 74LS138
U11 74LS00
U12 74LS273
U13 74LS74A
U14-21 TMM416P-3 (4116-3 16k x 1bit dynamic RAM)
U22 74LS05
U23-24 SN74LS541
BASIC CART PEN-700 11-50332-31 Rev.0
SD-BASIC VERSION 2.0 FOR PENCIL II
(c) 1983 SOUNDIC ELECTRONICS LTD HONG KONG ALL RIGHTS RESERVED
1 x 2732
2 x 2764
The roms were dumped by attaching a cable from the printer port to
a Super-80 and writing programs in Basic to transfer the bytes.
Therefore it is not known which rom "202" or "203" is which address range.
MEMORY MAP
0000-1FFF bios rom
2000-5FFF available for expansion
6000-7FFF static RAM (2K mirrored)
8000-FFFF cart slot
The 16k dynamic RAM holds the BASIC program and the video/gfx etc
but is banked out of view of a BASIC program.
****************************************************************************/
#include "emu.h"
@ -66,7 +112,7 @@ static TMS9928A_INTERFACE(pencil2_tms9928a_interface)
static MACHINE_CONFIG_START( pencil2, pencil2_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", Z80, 3580000)
MCFG_CPU_ADD("maincpu", Z80, 10738000/3)
MCFG_CPU_PROGRAM_MAP(pencil2_mem)
MCFG_CPU_IO_MAP(pencil2_io)
@ -82,6 +128,7 @@ ROM_START( pencil2 )
ROM_REGION(0x10000, "maincpu", 0)
ROM_LOAD( "mt.u4", 0x0000, 0x2000, CRC(338d7b59) SHA1(2f89985ac06971e00210ff992bf1e30a296d10e7) )
ROM_LOAD( "1-or", 0xa000, 0x1000, CRC(1ddedccd) SHA1(5fc0d30b5997224b67bf286725468194359ced5a) )
ROM_RELOAD( 0xb000, 0x1000 )
ROM_LOAD( "203", 0x8000, 0x2000, CRC(f502175c) SHA1(cb2190e633e98586758008577265a7a2bc088233) )
ROM_LOAD( "202", 0xc000, 0x2000, CRC(5171097d) SHA1(171999bc04dc98c74c0722b2866310d193dc0f82) )
ROM_END
@ -89,4 +136,4 @@ ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT STATE INIT COMPANY FULLNAME FLAGS */
COMP( 19??, pencil2, 0, 0, pencil2, pencil2, driver_device, 0, "Hanimex", "Pencil II", GAME_IS_SKELETON)
COMP( 1983, pencil2, 0, 0, pencil2, pencil2, driver_device, 0, "Hanimex", "Pencil II", GAME_IS_SKELETON)