(Library.development)
Item: 16 by akcs.bson@hpcvbbs.cv.hp.com
Author: [Jan Brittenson]
  Date: Wed Feb 05 1992

[Note: What Jan here refers to (using Alonzo Gariepy's mnemonics) as
 the "IN.4 A" instruction, is the same as the "A=IN" instruction in
 HP's mnemonics.  Either way, it's opcode 802 (hex).  -jkh-]

Due to a bug in the Saturn CPU (or maybe the memory controller, or the
interconnect between them, or whatever, what do I know...) IN.4 A
*must* reside on an even address, or the next instruction will be
garbled. The solution is to call the ROM at address 1160. So, replace:

                  IN.4  A

with:

                  CALL 0x1160  ; do IN.4 A

[That's GOSBVL #1160 in HP mnemonics.  -jkh-]

The code at 1160 just does an IN.4 A followed by a RET. Since it's ROM
it will always be on an even (integral byte) address.