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Using several Extensions of same type on OpenMSX

by Juan Luis on 07-12-2019, 22:02
Score: 173.17 %, Type: Forum topic , Comments: 4 comments
I was testing RAM expansions with OpenMSX and I was wondering if it's possible to use several RAM expansions of same type from catapult. Thanks in advance. I have seen it's possible I have seen it's possible from OpenMSX ...

Question about memory management in MSX1

by Juan Luis on 07-12-2019, 09:31
Score: 173.08 %, Type: Forum topic , Comments: 15 comments
0xFC, 0xFD and 0xFE for selecting segments in Page 0, 1 and 2. It's also possible to select ... for that question. You can just use the ports You can just use the ports 0xFC, 0xFD, 0xFE and 0xFF. You ... zPasi wrote: You can just use the ports 0xFC, 0xFD, 0xFE and 0xFF. You don't need any BIOS ...

How to do an attach?

by Juan Luis on 30-11-2019, 00:55
Score: 173.02 %, Type: Forum topic , Comments: 4 comments
I would want to upload a .rom file to the Development forum to discuss some details and I don't know how to do it. I have seen other developers were able to uploaded files. Can somebody help me? Thanks in advance. Link to Google ...

Cursor on V9990

by Juan Luis on 23-11-2019, 01:19
Score: 172.75 %, Type: Forum topic , Comments: 20 comments
PATTERNS PUSH HL DI LD E,7 LD HL,#FF00 CALL G9kSetVramWrite ;LD HL,PATRO1 ;N0 POP HL LD B,128 LD ... later than 0.15.0, where it was implemented. If not, it looks black. Thanks Manel46. I was able ... DMA 3.- You use in register 8 VLS1 = 1 and VLS0=1 (undocumented memory configuration). I use VLS1 = ...

Sjasm conditional assembly

by Juan Luis on 12-08-2019, 00:59
Score: 171.14 %, Type: Forum topic , Comments: 2 comments
MSX_BIOS_INC endmacro ... EXTBIOS equ 0xFFCA ... endif ----------------------- ... http://xl2s.tk/sjasmm Manual: http://xl2s.tk/sjasmman0.html Look at the .lst file You Look ...

How to create a long ROM file

by Juan Luis on 18-04-2019, 20:31
Score: 169.53 %, Type: Forum topic , Comments: 19 comments
while using 0 KB's of RAM (apart from stack & some variables of course). Code in the ROM sits ... Put in the header of rom, before start, the following bytes: DB 32h,0,70h,32h,0FFh,77h And you do ...

Doubts about SFG-01 and SFG-05

by Juan Luis on 06-04-2019, 12:16
Score: 169.11 %, Type: Forum topic , Comments: 7 comments
memory-mapped I/O, rather than an I/O port. It uses memory addresses 3FF0H and 3FF1H for the YM2151 OPM. Determine the slot by scanning slots for the “MCHFM0” ID string at address 0080H. When entering the music replayer routine, enable the SFG slot and write to addresses 3FF0H and 3FF1H to access the YM2151 OPM. ...

How to transfer a long file to hard disk on openMSX

by Juan Luis on 03-04-2019, 05:01
Score: 169.05 %, Type: Forum topic , Comments: 5 comments
Hi to everyone, sometimes I need to copy long files to a virtual hard disk on OpenMSX. To do this, I mount a Windows directory as virtual floppy disk but the maximum size of this virtual floppy disk is 720KB. If the directory has more than that size ...

Moonsound OPL4 programming

by Juan Luis on 10-02-2019, 07:41
Score: 168.07 %, Type: Forum topic , Comments: 8 comments
necesitamos. Guardamos una copia de A en él. add a,0x80 call write_moonsound_wav_register ; ... A ld a,h ex af,af' ; salvando en Reg. A shadow el valor de pan ld a,d and 0x0F add a,a ... MOONSOUND_WAVE_REG_PORT equ 0x7E MOONSOUND_WAVE_DATA_PORT equ 0x7F MOONSOUND_STATUS_REG_PORT equ ...
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