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Update NoteTaker notes and history a bit (nw)

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Lord-Nightmare 2016-02-10 14:37:51 -05:00
parent a686075690
commit a9cfa69af9
1 changed files with 22 additions and 13 deletions
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35
src/mame/drivers/notetaker.cpp
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@ -1,19 +1,24 @@
// license:BSD-3-Clause
// copyright-holders:Jonathan Gevaryahu
/* Xerox Notetaker, 1978
/* Xerox NoteTaker, 1978
* Driver by Jonathan Gevaryahu
*
* <Note that below is a really lousy write-up, this system deserves much better. use the Ingalls-2014-Smalltalk78.pdf as a better source for all this stuff!>
* Designed by Alan Kay and Many others, with BIOS written by Bruce Horn
* <Note that below is a really lousy write-up, this system deserves much better.
We should use the Ingalls-2014-Smalltalk78.pdf as a better source for all this stuff!>
* Designed by Alan Kay and many others, with BIOS written by Bruce Horn (BitBlt function in BIOS written by Dan Ingalls)
* History of the machine can be found at http://freudenbergs.de/bert/publications/Ingalls-2014-Smalltalk78.pdf
* prototypes only, around 10 units manufactured 1978-1980 (one at CHM, not sure where the others are)
* This device was the origin of Smalltalk-78 (which acted as the operating system of the Notetaker)
* The Notetaker also introduced the BitBlt graphical operation, which was used to do most graphical functions in Smalltalk-78
* As far as I am aware, no media (world disks/boot disks) for the Notetaker have survived, only an incomplete ram dump of the smalltalk-76
* 'world' which was used to bootstrap smalltalk-78 originally
*
* prototypes only, around 10 units manufactured 1978-1980
One at CHM (missing? mouse, no media)
One at Xerox Museum at PARC (with mouse and 2 floppies, no floppy images available)
* This device was the origin of Smalltalk-78 (which acted as the operating system of the NoteTaker)
* The NoteTaker also used the BitBlt graphical operation to do most graphical functions in Smalltalk-78
BitBlt was not invented for the NoteTaker, but for the Alto; however unlike the Alto, the NoteTaker used it for almost every graphical operation.
* As far as I am aware, no media (world disks/boot disks) for the NoteTaker have survived (except maybe the two disks at Xerox Museum at PARC), but an incomplete dump of the Smalltalk-76 'world' which was used to bootstrap Smalltalk-78 originally did survive on the Alto disks at CHM
* see http://bitsavers.informatik.uni-stuttgart.de/pdf/xerox/notetaker for additional information
* http://bitsavers.trailing-edge.com/pdf/xerox/notetaker/memos/19790620_Z-IOP_1.5_ls.pdf is listing of the biop v1.5 code
* see http://xeroxalto.computerhistory.org/Filene/Smalltalk-76/ for the smalltalk-76 dump
* see http://xeroxalto.computerhistory.org/Indigo/BasicDisks/Smalltalk14.bfs!1_/ for more notetaker/smalltalk related files
*
* MISSING DUMP for 8741? I/O MCU which does mouse-related stuff
@ -116,9 +121,13 @@ BootSeqDone is 1, DisableROM is 0, mem map is 0x00000-0x00fff reading is t
BootSeqDone is 1, DisableROM is 1, mem map is entirely RAM or open bus for both reading and writing.
*/
static ADDRESS_MAP_START(notetaker_mem, AS_PROGRAM, 16, notetaker_state)
/*AM_RANGE(0x00000, 0x00fff) AM_ROM AM_REGION("maincpu", 0xFF000) // I think this copy of rom is actually banked via io reg 0x20, there is RAM which lives behind here?
AM_RANGE(0x01000, 0x3ffff) AM_RAM // ram lives here, 256KB
AM_RANGE(0xff000, 0xfffff) AM_ROM // is this banked too? Don't think so...*/
/*
AM_RANGE(0x00000, 0x00fff) AM_ROM AM_REGION("maincpu", 0xFF000) // rom is here if either BootSeqDone OR DisableROM are zero. the 1.5 source code implies writes here are ignored
AM_RANGE(0x01000, 0x01fff) AM_RAM // 4k of ram, local to the io processor
AM_RANGE(0x02000, 0x3ffff) AM_RAM AM_BASE("sharedram") // 256k of ram (less 8k), shared between both processors
// note 4000-8fff? is the framebuffer for the screen?
AM_RANGE(0xff000, 0xfffff) AM_ROM // rom is only banked in here if bootseqdone is 0, so the reset vector is in the proper place
*/
AM_RANGE(0x00000, 0xfffff) AM_READWRITE(maincpu_r, maincpu_w) // bypass MAME's memory map system as we need finer grained control
ADDRESS_MAP_END
@ -256,7 +265,7 @@ ROM_START( notetakr )
ROM_REGION( 0x100000, "ram", ROMREGION_ERASEFF ) // ram cards
ROM_REGION( 0x1000, "proms", ROMREGION_ERASEFF )
ROM_LOAD( "disksep.prom.82s147.a4", 0x000, 0x200, NO_DUMP ) // disk data separator prom from the disk/display module board
ROM_LOAD( "setmemrq.prom.82s126.d9", 0x200, 0x100, NO_DUMP ) // SETMEMRQ memory timing prom from the disk/display module board
ROM_LOAD( "setmemrq.prom.82s126.d9", 0x200, 0x100, NO_DUMP ) // SETMEMRQ memory timing prom from the disk/display module board; The equations for this one are actually listed on the schematic, so it should be pretty easy to recreate.
ROM_END
/* Driver */