Subversion Repositories tv80

The tvs80 test was ported from Brian Porcella's environment, and as

such has some specific dependencies.  In particular, it is dependent

on the as80.exe DOS assembler.

To get this to build under Linux requires using the DOSBOX DOS

emulator.  Developent is currently being done with version 0.60.

To build and run the tvs80 test:

chdir tests/tvs80

./build

cd ../..

scripts/run2 tvs80

===================

Verification Status

===================

test ld_110 fails.  Code executed by ld_110 is:

ld_110:         ld      a,data_55

                ld      i,a

                ld      a,0

                ld      a,i

                jr      nz,ld_111

This puts a constant pattern in the A register, moves A into the interrupt

page register, clears A, then moves I back to A.  This looks like it's testing

for a side-effect in the original Z80, because moving data to the interrupt

page shouldn't clear the Z flag, but the test is expecting this.

Tests ld_110 through ld_116 all appear to test for the same behavior.

SP Increment/Decrement:

Tests inc_60 and dec_52 look like they test for the increment and

decrement instructions decrementing both halves of the SP register;

i.e. SP = SP - 0101 instead of SP = SP - 0001

Fixed these tests by setting the initial value of SP to +/- 100