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BlueMSX direct VDP registers access
Score: 110.27 %,
Type: Forum topic , Comments: 10 comments
that status register 0 is selected for reading so if you leave VDP #15 pointing to status register 2 then the bios will "crash" as you've describe yourself when debugging it.
Because register 0 ... 0
3) you need to set to 0 S2 after having finished and before re-enabling the interrupts ...
Smooth horizontal scroll on MSX2 using r#23
Score: 110.31 %,
Type: Forum topic , Comments: 13 comments
a scanline interrupt (by setting r#19 and r#0)
- or simply set the r#19 and check on r#0 until the scanline ... of interrupts. The interrupt handler is managed by a RST 038h, which in turns calls the 0FD9Ah hook in the system ... in r#0, and only check on r#0 until the scan interrupt flag (F) is set in s#0. Anyone can confirm this ? ...
BitBuster depack in VRAM
Score: 130.96 %,
Type: Forum topic , Comments: 89 comments
(INTCNT).
After looking at the Pletter0.5b source, I can confirm that I will also write a VRAM depacker ...
http://www.worldofspectrum.org/forums/showpost.php?p=224886&postcount=23
One more byte can be cutted from the small one, with this smaller ap_getbit:
ap_getbit: ... with msx2, but I need to put 2 nops between outs with NoFun using screen 0, width 80.
Look again ...
Reading the control registers of the VDP
Score: 110.44 %,
Type: Forum topic , Comments: 6 comments
#F3DF - #F3E6: registers 0-7
#FFE7 - #FFF6: registers 8-23
#FFFA - #FFFC: registers 25-27
Thanks ...
Interrupts help needed
Score: 110.46 %,
Type: Forum topic , Comments: 8 comments
karoshi forum for this http://karoshi.msxgamesbox.com/index.php?topic=212.0 )
the interrupt code ... PopulateKeyMatrix
ld a,(keys+8) ;space
bit 0,a ;Check whether space is pressed
ret z ...
MSX-Music BIOS info
Score: 110.42 %,
Type: Forum topic , Comments: 32 comments
Koustracker
- Studio FM
- Super Music Editor 3.0
Based solely on the efficiency of the driver/player, ...
Where can I find MuSICA ?
Score: 113.01 %,
Type: Forum topic , Comments: 27 comments
All right, I give up
I googled around the world, but I can't seem to find the MuSICA program.
Can someone help me ?
BTW, if you have another idea for a music program or tracker that handles MSX-Music, SCC and PSG, give me a sign.
...
VDP Speed
Score: 110.59 %,
Type: Forum topic , Comments: 5 comments
Hi,
Does anyone has some data on the speed of the V9938 macro commands (bytes/µsec or pixels/µsec) ?
Specifically, I'm searching for the speed of the HMMM command, but any info on the other commands are welcomed as well.
Thanks.
...
Limitations with MSX-Music
Score: 128.01 %,
Type: Forum topic , Comments: 62 comments
to configure the YM2413 to DAC mode on the register 0Fh.
2) Output your samples to the register #10h. The ... both and compare the results.
Register description:
Reg #0Fh TST
7 6 5 4 3 2 1 0
+---+---+---+---+---+---+---+---+
| - | - | - | - |SND| - | - |SMP| ...
RST $38 T-states
Score: 110.41 %,
Type: Forum topic , Comments: 10 comments
9100h ;tab vectors im 2
;========================================
.phase 9000h-7
db 0feh ;flag binare ...
test2: jr start
;----------------------------------------
;&H9002
res_1: dw 0 ;result without RST 38
;&H9004
res_2: dw 0 ;result with RST 38
;----------------------------------------
; set INT mode 2
start: ...
