10. Reference Docs

Mr. Coffee Jumper Assignments

J0206                   JTAG header, perhaps JSCC compatible. 
J0904   1-2 shortened   Enter POST - output ttya, input ttya 
        1-2 open        Skip POST - output screen, input ttya 
        3-4             Unused 
        5-6             Unused 
        7-8             Unused 
J1101   1-2 open (dflt) TPE squelch 
        1-2 short       Reduced squelch threshold 
J1102   1-2 open (dflt) 100 Ohm TPE termination 
            short       150 Ohm TPE termination 
J1602                   Manufacturing test of unknown sort 
J1603   1-2             PROM select (unfortunately PROM socket is emply) 
        2-3 (default)   Flash select 
J1604   1-2             FPROM write disable 
        2-3 (default)   FPROM write enable 

J0904 block is a bit block of pullup resistors which a user may shorten. 
They may be read from the keyboard controller with a command 0xDD.

Krups Jumper Assignments

J1202   1-2     Use Flash 
        2-3     Select optional diagnostic FLASH PROM in socket J1203 
                (this does not sound quite right ...) 
J1300   1-2     Software debug use 
        3-4     Factory use - PROM switch?? 
        5-6     Unused 
        7-8     Flash update recovery 
J0500           JTAG 

By Pete Zaitcev
1999/11/01
2000/08/22

I am not responsible for any direct or indirect damages to your
equiment or yourself resulting from you reading this document.
USE THIS INFORMATION ON YOUR OWN RISK.

IDE interrupt line is connected "upside down" on the Espresso.
To have IDE working we need to insert an invertor in it.
We borrow the invertor from ISA IRQ3. If you want to use ISA
modem, set it to use COM3/IRQ4 (please realize that Linux IRQ
level would be programmed in CPU PCIC).

The following picture provides an overhead view:

    +==================== wire 1 =======================+
    #                                                   #
    #           1202                        1200        #            1201
    #        +-------+                   +-------+      #         +-------+
    #       -!  REP  !--14            1 -!  INV  !- 14  #         !       !
    #       -!       !-                 -!       !-     #         !       !
    #       -!       !-                 -!       !-     #         !       !
    #     4 -!       !-                 -!       !--11==+         !       !
    # /---5--!       !-                 -!       !--10====+       !       !
    #/    6--!--\    !-                 -!       !-  9    #       !       !
A-> *     7 -!   \---!---8              -!       !-  8    #       !       !
    !        +-------+   !               +-------+        #       +-------+
    !                    !                                #
    Z                    ! /=========== wire 2 ===========+
    Z                    !/
    Z R2026          B-> +--- ZZZZ ---*
    Z (pullup)               R1208
    !
    *

I recommend to proceed in the following way:

1. Disconnect 1202 5 & 6. Not knowing if I need them I lifted pins with a
model knife. You may just cut them with side cutters.

2. Lift pins 1200 10 & 11 but do not cut them!

3. Run wires from resistor pads "A" to pin 1200 11 and from pad "B" to
   pin 1200 10. Resistor pads are much easier targets for soldering at home
   than pads under pins 1202 5 & 6. I am a software engineer, so I did it
   the easy way.

   I did not bother to glue wires as a decent electronics hacker would do.

   You are all set. Get kernel 2.4, hack drivers/block/Config.in and enjoy!

   P.S. Let me know if you have drawings of hard drive brackets for Espresso.

Javastation Key Combinations

These are the key combinations that allow you to perform the command monitor
functions:
Press left Alt, left Ctrl key, letter; then turn the power on. You have to
have the keys pressed when you turn on the power otherwise it will not work. 

Ctrl-Alt-H Help on chords
Ctrl-Alt-B Show progress banner
Ctrl-Alt-W Show Ether net address and memory size
Ctrl-Alt-D Run diagnostics