Posted By
Litwr
on 2013-08-28
06:40:36
|  Re: Yet another emulator error
I've just found other two bugs. Try
>ff06 18
at monitor. The Yape's bottom line differs from this line at Plus4emu, '+4forever?' or the real hardware. The second bug is tricky. Try to enter the next code
a 2000 STA $FF3F
. 2003 LDA #$40
. 2005 STA $FFFE
. 2008 LDA #$20
. 200A STA $FFFF
. 200D LDA #$14
. 200F STA $FF0B
. 2012 LDA #$A3
. 2014 STA $FF0A
. 2017 LDX #$37
. 2019 JMP $2019
a 2040 STX $FF1D
. 2043 LDA #$C2
. 2045 STA $FF0B
. 2048 LDA #$A2
. 204A STA $FF0A
. 204D LDA #$80
. 204F STA $FFFE
. 2052 LDA #$72
. 2054 INC $FF09
. 2057 RTI
a 2080 STA $FF1D
. 2083 LDA #$CD
. 2085 STA $FF0B
. 2088 LDA #$A0
. 208A STA $FFFE
. 208D LDA #$FA
. 208F INC $FF09
. 2092 RTI
a 20A0 STA $FF1D
. 20A3 LDA #$14
. 20A5 STA $FF0B
. 20A8 LDA #$A3
. 20AA STA $FF0A
. 20AD LDA #$40
. 20AF STA $FFFE
. 20B2 INC $FF09
. 20B5 RTI
g2000
Yape and '+4forever?' show 320x280 picture (40x35 text) but the real hardware or plus4emu show the wrong vertical synchronization. This code maybe taken from here.
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