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Wondering about starting coding z80/v9938 again :) MEMCPY

by Bengalack on 12-02-2020, 21:15
Score: 159.69 %, Type: Forum topic , Comments: 3 comments
Is been almost 30 years, so I need to brush up my memory here. But say, using the v9938 and screen 4 (I like tiles ), what is the fastest way to move the contents of the screen, 8 pixels, say from left to right? Is there a VRAM->VRAM move / ...

A tool to visually show/dump the contents (as bitmap) of the RAM and VRAM

by Bengalack on 12-02-2020, 21:40
Score: 159.7 %, Type: Forum topic , Comments: 3 comments
Are there any good tools for this? I found a feature in the debugger for (the great) openmsx, but it seems limited to only a small part of the vram (and does not show normal ram, unless I missed something). I was thinking some tool that connects to ...

Trouble referencing label in asm-file from c-file when using SDCC

by Bengalack on 29-02-2020, 22:07
Score: 159.91 %, Type: Forum topic , Comments: 10 comments
unsigned char g_msg2[] = "This works!\0"; extern int print(unsigned char*); int main(void) { print(g_msg2); print(g_msg); // this one is the problem!!! return 0; } and "allsorts.s" ... print or a ret z push hl push ix ld iy, (#0xfcc0); BIOS_ROMSLT ld ix, #0x00a2; BIOS_CHPUT call ...

How can I build openmsx debugger on Windows?

by Bengalack on 01-03-2020, 22:29
Score: 160.12 %, Type: Forum topic , Comments: 6 comments
compiler is build The windows compiler is build with Qt5.7.0 - keep in mind that only the 64bit version ...

Attempting using page 1 in screen 4 for name table only - not working

by Bengalack on 16-03-2020, 22:23
Score: 160.22 %, Type: Forum topic , Comments: 2 comments
Table, Name Table, Color Table, etc). It's all defaulted to page 0, or 0 - 0x3FFF. Supposedly ... I suggest these variants: #define SCR4_NAME_TABLE_ADDRESS_PAGE0 0x1800 #define SCR4_NAME_TABLE_ADDRESS_PAGE1 0x5800 I will then set ...

C-debugger for MSX?

by Bengalack on 28-03-2020, 10:27
Score: 160.51 %, Type: Forum topic , Comments: 7 comments
Pardon my ignorance, but does there exist a decent debugger we can use when doing C-programming? In practise, when also using openmsx (as this is my default dev-platform)? Currently using openmsx and its debugger. These two products are great, but ...

Correct info about sprite priority?

by Bengalack on 14-04-2020, 17:53
Score: 160.86 %, Type: Forum topic , Comments: 4 comments
This page: https://www.msx.org/wiki/PUT_SPRITE states: "< sprite number > is a number between 0 and 31 that specifies the display priority number of sprite. When the number is bigger, ... Sprite 0 is prioritized before sprite 1. :-? From memory (granted, a long From memory ...

Memory / Variable runtime watch

by Bengalack on 03-04-2020, 19:31
Score: 160.72 %, Type: Forum topic , Comments: 6 comments
ram_watch script. Type help ram_watch for usage information. Example: ram_watch add 0 ... and it seems like another slot is showing both in the watch and "default" in the debugger: Slot 0 (on ... in this fragment: # sanitize input set addr [format 0x%04X $addr_str] if {($addr < ...

What is going on over at 0x0038/VDP when NOT using EXX?

by Bengalack on 29-04-2020, 20:48
Score: 161.1 %, Type: Forum topic , Comments: 17 comments
("myLeanInterruptRoutine") uses only A(F) and HL-register, and is doing IN and OUT from port 0x99. And here is the deal: ... only in random frames ("POP-CODE"). Stub A 0x0038: exx push af push hl call myLeanInterruptRoutine pop hl pop af exx ei reti Stub B 0x0038: push af ...

Use of SEE / SEE3?

by Bengalack on 06-05-2020, 18:44
Score: 161.31 %, Type: Forum topic , Comments: 5 comments
I was looking for a way to play some simple sound effects in a game (that is: using the sound driver, i.e. the supplied asm-source code). I found SEE (3.10 - on Konamiman's website). When it comes to legal stuff, I could need some hints on how to ...
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