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Updated NoteTaker documentation and history section, with cited sources. [Lord Nightmare]

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Lord-Nightmare 2016-02-10 16:55:55 -05:00
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src/mame/drivers/notetaker.cpp
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// copyright-holders:Jonathan Gevaryahu
/* Xerox NoteTaker, 1978
* Driver by Jonathan Gevaryahu
*
* <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)
* Notetaker Team At Xerox PARC 1976-1980:
Alan Kay - Team Lead
Bruce Horn - BIOS code and more
Ted Kaehler - SmallTalk-76 code porting[2] and more ( http://tedkaehler.weather-dimensions.com/us/ted/index.html )
Dan Ingalls - BitBlt engine and SmallTalk kernel and more[3]
Doug Fairbairn - NoteTaker Hardware ( http://www.computerhistory.org/atchm/author/dfairbairn/ )
<probably others I've missed>
* 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 (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.
* Prototypes only, 10 units[2] manufactured 1978-1980
Known surviving units:
* One at CHM (missing? mouse, no media)
* One at Xerox Museum at PARC (with mouse and 2 floppies, floppies were not imaged to the best of my knowledge)
* The NoteTaker used the BitBlt graphical operation (from SmallTalk-76) to do most graphical functions, in order to fit the SmallTalk code and programs within 256K of RAM[2]. The actual BitBlt code lives in ROM[3].
* 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
* see http://xeroxalto.computerhistory.org/Indigo/BasicDisks/Smalltalk14.bfs!1_/ for more notetaker/smalltalk related files, including SmallTalk-80 files based on the notetaker smalltalk-78
References:
* [1] http://freudenbergs.de/bert/publications/Ingalls-2014-Smalltalk78.pdf
* [2] "Smalltalk and Object Orientation: An Introduction" By John Hunt, pages 45-46 [ISBN 978-3-540-76115-0]
* [3] http://bitsavers.trailing-edge.com/pdf/xerox/notetaker/memos/19790620_Z-IOP_1.5_ls.pdf
* [4] http://xeroxalto.computerhistory.org/Filene/Smalltalk-76/
* MISSING DUMP for 8741? Keyboard MCU which does row-column scanning and mouse-related stuff
TODO: everything below.
* Get the running machine smalltalk-78 memory dump loaded as a rom and forced into ram on startup, since no boot disks have survived
* figure out the correct memory maps for the 256kB of shared ram, and what part of ram constitutes the framebuffer
* figure out how the emulation-cpu boots and where its 4k of local ram maps to
* Get smalltalk-78 loaded as a rom and forced into ram on startup, since no boot disks have survived (or if any survived, they are not dumped)
* floppy controller wd1791
According to http://bitsavers.trailing-edge.com/pdf/xerox/notetaker/memos/19790620_Z-IOP_1.5_ls.pdf the format is 128 bytes per sector, 16 sectors per track (one sided)
According to [3] the format is 128 bytes per sector, 16 sectors per track (one sided)
According to the schematics, we're missing an 82s147 DISKSEP.PROM used as a data separator
* crt5027 video controller
* i8251? serial/EIA controller
* crt5027 video controller; we're missing a PROM used to handle memory arbitration between the crtc and the rest of the system, but the equations are on the schematic
* Harris 6402 serial/EIA UART
* Harris 6402 keyboard UART
* HLE for the missing MCU which reads the mouse quadratures and buttons
* HLE for the missing MCU which reads the mouse quadratures and buttons and talks serially to the Keyboard UART
WIP:
* pic8259 interrupt controller - this is attached as a device, but the interrupts are not hooked to it yet.
* i/o cpu i/o area needs the memory map worked out per the schematics - partly done
*/
#include "cpu/i86/i86.h"