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ENGLISH.DOX
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1996-01-24
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3KB
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109 lines
NOTE NOTE NOTE NOTE
THIS TRANSLATION IS AVERY QUICK ONE. THERE MIGHT BE MISTAKES IN IT.
I TAKE NO RESPONIBILITY FOR POSSIBLE MISTAKES.
(TRANSLATION BY judas@tomtec.abg.sub.org)
Address of the authors:
Das COPYRIGHT bleibt fuer obige Dateien bei uns.
=========================================================================
Torsten Kalbe Manfred Moersner
3160 Lehrte 3160 Lehrte Juli 1992
Vor den Gaerten 6 Vor den Gaerten 8
=========================================================================
This hack is based on the ability of PALEN and PALCAS of selecting
a kickstart-rom.Pin 12 of PALCAS is able to supply the select-signal
for a kickstart... exactly what we need..
1. Modification of a piggypack-board
-------------------------------------------
cut off 3 lines like shown on the piggypack-picture:
the uppersite of piggypack: route from Pin18 (U6J) (CDW)
to pin 1+19 of U4L/U4J. (LS244)
downside of piggy: pin 19 U6J (ROM01) goes to Pin22 of
all 4 Roms/Eproms (U5N,U2N,U5P,U2P)
at pin17 of DAUGCAS (U6J): cutt off the line on the upperside
of your board. (CDR). This line goes to Pin1 U4K/U4H to control
the LS373.
solder a 1K resistor from pin1 to pin20 at U4J to lock the
LS244.
solder one more 1K at U4H from 1 to 20 to lock the LS373.
solder a wire from pin12 U6K (rom01) to pin 12 U6Q.
(Warning: the numbers of this connector are not labeled as
the other chips.)
If you have your Rom on Eproms allready, just set the jumpers and
you`re ready to go.
2. Modification of the multilayerboard
---------------------------------------------
cut off lines like shown in the Multlayer-picture.
pin18 U6N (CDW) to Pin1+19 U3K/U4K (LS244). it`s located
near to the hole on the board, near jumpers.
pin17 U6N (CDR) to pin1 of U3J/U4J (LS373). it`s close to the
resistor-array R9N.
pin19 U6N (ROm01) to pin22 of all 4 Roms.on the downside, there`s
a contact which goes through the board. it`s under U5N.
Here we cut off .
solder a 1K resistor from pin1 to pin20 at U4K. (LS244)
solder a 1K resistor from pin1 to pin20 at U3J. (LS373)
solder a wire from pin12 U6P (rom01) to pin22 of U5N.
----------------------------------------------------------------
Jumpersettings:
W1 1 2-3 (2 and 3) A15
W2 1-2 3 A16
W3 1-2 3 A14
W4 1 2-3 A17
W5 1-2 3 left/right 2 ROMS
on the multilayer jumpers are labeled 123. sometimes 312.
on the piggypack, connector 1 is square, 2 and 3 are round.
W2 and W4 show different factory-settings (2+3/1+2)
you must open them first to set them correctly.
----------------------------------------------------------------
for kick2.0 8 Eproms are needed. brave people might solder these
onto each other and might build a decoder-logic into a chip.
a chips for controling CS-signals on pin20 according to A18.
If you don`t like building chip-towers, you better use the layout which
fits into both ROM-sockets.