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Xerox NoteTaker: Finish documenting the I/O CPU's I/O ports, update history documentation a bit more [Lord Nightmare]

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Lord-Nightmare 2016-02-11 00:15:44 -05:00
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71
src/mame/drivers/notetaker.cpp
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@ -8,8 +8,10 @@
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>
Doug Fairbairn - NoteTaker Hardware/Electronics Design ( http://www.computerhistory.org/atchm/author/dfairbairn/ )
James Leung - NoteTaker Hardware/Electronics Design
Ron Freeman - NoteTaker Hardware/Electronics Design
<there are probably others I've missed>
* History of the machine can be found at http://freudenbergs.de/bert/publications/Ingalls-2014-Smalltalk78.pdf
@ -31,6 +33,7 @@
* [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/
* [5] http://bitsavers.trailing-edge.com/pdf/xerox/notetaker/memos/19790118_NoteTaker_System_Manual.pdf
* MISSING DUMP for 8741? Keyboard MCU which does row-column scanning and mouse-related stuff
TODO: everything below.
@ -38,16 +41,16 @@ TODO: everything below.
* 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 [3] the format is 128 bytes per sector, 16 sectors per track (one sided)
According to [3] and [5] the format is double density/MFM, 128 bytes per sector, 16 sectors per track, 1 or 2 sided, for 170K or 340K per disk.
According to the schematics, we're missing an 82s147 DISKSEP.PROM used as a data separator
* 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 and talks serially to the Keyboard UART
* HLE for the missing i8748[5] MCU in the keyboard 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
* i/o cpu i/o area needs the memory map worked out per the schematics - mostly done
*/
#include "cpu/i86/i86.h"
@ -147,28 +150,48 @@ ADDRESS_MAP_END
/* io memory map comes from http://bitsavers.informatik.uni-stuttgart.de/pdf/xerox/notetaker/memos/19790605_Definition_of_8086_Ports.pdf
and from the schematic at http://bitsavers.informatik.uni-stuttgart.de/pdf/xerox/notetaker/schematics/19790423_Notetaker_IO_Processor.pdf
a19 a18 a17 a16 a15 a14 a13 a12 a11 a10 a9 a8 a7 a6 a5 a4 a3 a2 a1 a0
? ? ? ? 0 x x x x x x 0 0 0 0 x x x * . RW IntCon (PIC8259)
? ? ? ? 0 x x x x x x 0 0 0 1 x x x x . W IPConReg
? ? ? ? 0 x x x x x x 0 0 1 0 x x x x . W KbdInt
? ? ? ? 0 x x x x x x 0 0 1 1 x x x x . W FIFOReg
? ? ? ? 0 x x x x x x 0 1 0 0 x x x x . . Open Bus
? ? ? ? 0 x x x x x x 0 1 0 1 x x x x . . Open Bus
? ? ? ? 0 x x x x x x 0 1 1 0 x x x x . W FIFOBus
? ? ? ? 0 x x x x x x 0 1 1 1 x x x x . . Open Bus
0 0 0 0 0 0 0 0 * * * * * * * * * * * . R ROM, but ONLY if BootSegDone is TRUE, and /DisableROM is FALSE
x x x x 0 x x x x x x 0 0 0 0 x x x * . RW IntCon (PIC8259)
x x x x 0 x x x x x x 0 0 0 1 x x x x . W IPConReg
x x x x 0 x x x x x x 0 0 1 0 x 0 0 0 . . KbdInt:Open Bus
x x x x 0 x x x x x x 0 0 1 0 x 0 0 1 . R KbdInt:ReadKeyData
x x x x 0 x x x x x x 0 0 1 0 x 0 1 0 . R KbdInt:ReadOPStatus
x x x x 0 x x x x x x 0 0 1 0 x 0 1 1 . . KbdInt:Open Bus
x x x x 0 x x x x x x 0 0 1 0 x 1 0 0 . W KbdInt:LoadKeyCtlReg
x x x x 0 x x x x x x 0 0 1 0 x 1 0 1 . W KbdInt:LoadKeyData
x x x x 0 x x x x x x 0 0 1 0 x 1 1 0 . W KbdInt:KeyDataReset
x x x x 0 x x x x x x 0 0 1 0 x 1 1 1 . W KbdInt:KeyChipReset
x x x x 0 x x x x x x 0 0 1 1 x x x x . W FIFOReg
x x x x 0 x x x x x x 0 1 0 0 x x x x . . Open Bus
x x x x 0 x x x x x x 0 1 0 1 x x x x . . Open Bus
x x x x 0 x x x x x x 0 1 1 0 x x x x . W FIFOBus
x x x x 0 x x x x x x 0 1 1 1 x x x x . . Open Bus
x x x x 0 x x x x x x 1 0 0 0 x x x x . RW SelDiskReg
x x x x 0 x x x x x x 1 0 0 1 x x * * . RW SelDiskInt
x x x x 0 x x x x x x 1 0 1 0 * * * * . W SelCrtInt
x x x x 0 x x x x x x 1 0 1 1 x x x x . W LoadDispAddr
x x x x 0 x x x x x x 1 1 0 0 x x x x . . Open Bus
x x x x 0 x x x x x x 0 1 0 1 x 0 0 0 . R SelEIA:ReadEIAStatus
x x x x 0 x x x x x x 0 1 0 1 x 0 0 1 . R SelEIA:ReadEIAData
x x x x 0 x x x x x x 0 1 0 1 x 0 1 0 . . SelEIA:Open Bus
x x x x 0 x x x x x x 0 1 0 1 x 0 1 1 . . SelEIA:Open Bus
x x x x 0 x x x x x x 0 1 0 1 x 1 0 0 . W SelEIA:LoadEIACtlReg
x x x x 0 x x x x x x 0 1 0 1 x 1 0 1 . W SelEIA:LoadEIAData
x x x x 0 x x x x x x 0 1 0 1 x 1 1 0 . W SelEIA:EIADataReset
x x x x 0 x x x x x x 0 1 0 1 x 1 1 1 . W SelEIA:EIAChipReset
x x x x 0 x x x x x x 1 1 1 0 x x x x . R SelADCHi
x x x x 0 x x x x x x 1 1 1 1 x x x x . W CRTSwitch
*/
static ADDRESS_MAP_START(notetaker_io, AS_IO, 16, notetaker_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x00, 0x03) AM_MIRROR(0x7E1C) AM_DEVREADWRITE8("pic8259", pic8259_device, read, write, 0x00ff)
AM_RANGE(0x20, 0x21) AM_MIRROR(0x7E1E) AM_WRITE(IPConReg_w) // processor (rom mapping, etc) control register
//AM_RANGE(0x42, 0x43) AM_READ read keyboard data (high byte only) [from mcu?]
//AM_RANGE(0x44, 0x45) AM_READ read keyboard fifo state (high byte only) [from mcu?]
//AM_RANGE(0x48, 0x49) AM_WRITE kbd->uart control register [to mcu?]
//AM_RANGE(0x4a, 0x4b) AM_WRITE kbd->uart data register [to mcu?]
//AM_RANGE(0x4c, 0x4d) AM_WRITE kbd data reset [to mcu?]
//AM_RANGE(0x4e, 0x4f) AM_WRITE kbd chip [mcu?] reset [to mcu?]
//AM_RANGE(0x60, 0x61) AM_WRITE DAC sample and hold and frequency setup
AM_RANGE(0x00, 0x03) AM_MIRROR(0xF7E1C) AM_DEVREADWRITE8("pic8259", pic8259_device, read, write, 0x00ff)
AM_RANGE(0x20, 0x21) AM_MIRROR(0xF7E1E) AM_WRITE(IPConReg_w) // processor (rom mapping, etc) control register
//AM_RANGE(0x42, 0x43) AM_MIRROR(0xF7E10) AM_READ(ReadKeyData_r) // read keyboard data (high byte only) [from mcu?]
//AM_RANGE(0x44, 0x45) AM_MIRROR(0xF7E10) AM_READ(ReadOPStatus_r) // read keyboard fifo state (high byte only) [from mcu?]
//AM_RANGE(0x48, 0x49) AM_MIRROR(0xF7E10) AM_WRITE(LoadKeyCtlReg_w) // kbd uart control register
//AM_RANGE(0x4a, 0x4b) AM_MIRROR(0xF7E10) AM_WRITE(LoadKeyData_w) // kbd uart data register
//AM_RANGE(0x4c, 0x4d) AM_MIRROR(0xF7E10) AM_WRITE(KeyDataReset_w) // kbd uart ddr switch (data reset)
//AM_RANGE(0x4e, 0x4f) AM_MIRROR(0xF7E10) AM_WRITE(KeyChipReset_w) // kbd uart reset
//AM_RANGE(0x60, 0x61) AM_MIRROR(0xF7E1E) AM_WRITE(FIFOReg_w) // DAC sample and hold and frequency setup
//AM_RANGE(0x100, 0x101) AM_WRITE I/O register (adc speed, crtc pixel clock enable, etc)
//AM_RANGE(0x140, 0x15f) AM_DEVREADWRITE("crt5027", crt5027_device, read, write)
ADDRESS_MAP_END