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author Lord-Nightmare <Lord-Nightmare@users.noreply.github.com>2016-02-10 16:55:55 -0500
committer Lord-Nightmare <Lord-Nightmare@users.noreply.github.com>2016-02-10 16:55:55 -0500
commit5edf31d247fce31dace951af8a3b0d5be54f175a (patch)
tree252b956acb53e4d4d74cb4026e26b33b4f786dd5
parent96f78891f95c2f30ddfac71560538d666239da81 (diff)
Updated NoteTaker documentation and history section, with cited sources. [Lord Nightmare]
-rw-r--r--src/mame/drivers/notetaker.cpp53
1 files changed, 33 insertions, 20 deletions
diff --git a/src/mame/drivers/notetaker.cpp b/src/mame/drivers/notetaker.cpp
index 1e7bde4ff6f..e19f6983b2c 100644
--- a/src/mame/drivers/notetaker.cpp
+++ b/src/mame/drivers/notetaker.cpp
@@ -2,39 +2,52 @@
// 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"