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Jelly-Vision!As threatened in the "'Spectrum Play' Error" thread, here's a ruff'n'reddy interrupt driven full screen wobbling routine which has no practical use w…
... 't bother with a vector table. I thought that maybe BASin ... with a full 257 byte table but it still didn't ... to run the normal keyboard interrupt routine, doesn't work in ... -
The need of having a 257-byte table for IM2 routinesThis came from a discussion at the speccy.org forum. I have understood that the reason behind the 257-table for IM 2 routines is due to certain joys…
... .
IM2 table in some russian games is ... driver at begin of IM2 table (about 190-250 bytes ... turbo interface during IM2 interrupt cycle pull-up data ... last two bytes from table (and software work stable ... write with complette IM2 table full 257 bytes and ... -
The need of having a 257-byte table for IM2 routinesThis came from a discussion at the speccy.org forum. I have understood that the reason behind the 257-table for IM 2 routines is due to certain joys…
... trust the databus during an interrupt.
[quote]In fact ... the databus stable during an interrupt would never be a serious ... will have a 257 byte table, and no hardware support for ... -
c64 > spectrum ?I was recently talking to a c64 coder, (the guy who wrote mega apocalypse on 64) and he was telling me the speccy maker of the game used something to…
... emulate each 6502 instruction via table lookup, rather than do any ... about the memory map and interrupt mappings. And that, of course ... -
recovering the stack after an errorMy normal error handler starts with the stack as reset by LD SP,(ERR_SP) in $0053 ERROR_2, sets up some stuff and returns to BASIC via a "JP C,$1e73 …
... ) means "look up the DATA table starting at line 311 and ... }th element from the DATA table defined by the parameter string ... several PUSHes in the maskable interrupt routine). -
Video generation using a CPUWe know it is possible to generate a video signal using a CPU, and this technique was often used on low-end computers in the early 1980's (for exampl…
... of each display line, an interrupt is generated by the ULA ... normally points to the character table in the ROM.
interrupt is generated for the next ... -
Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…
and an IM2 routine has to have the vector table at a known point in memory... somehow you have got to CALL or interrupt and then return as they are the only way to get PC onto the stack. -
Mouse systems for ZX Spectrum[U][B]Mouse systems for ZX Spectrum[/B][/U] Okay, I have been reading the [URL="http://www.worldofspectrum.org/forums/showthread.php?p=688449#post68…
... interrupt then is possible use only last 2 bytes from table ... vector stability with incomplete IM2 table ?
Reply:< ... vector stabilisation = during IM2 interrupt set pull-up on ... for interrupt routine. Also russian software with incomplete IM2 table ... -
Keyboard scanning routines / techniques?What keyboard scanning routines or techniques do people use? I'm looking to write something which doesn't rely on the ROM-based keyboard scanner, an…
... the burst() method in every interrupt to send and receive 32 ... and then wait for next interrupt (blocking reception with RTS). This ... it returns a pointer to table of functions. Then you simply ... -
Keyboard scanning routines / techniques?What keyboard scanning routines or techniques do people use? I'm looking to write something which doesn't rely on the ROM-based keyboard scanner, an…
... the kernel.noi SDCC symbol table file to find its way ... to read an external symbol table, so that debugging using the ... idea to wait until next interrupt (without task switching), then do ... -
Interface 1 bisOk, well the postmans just been and brought with him my new arrival, the Interface 1 bis. So as promised I thought I'd share some initial usage exper…
... about data bus stability during interrupt ? Z80CPU need stable vector value ... mouse driver use incomplete IM2 table (often only some last bytes ... to begin of original IM2 table. ZX Spectrum models in combination ... zx sofware/games with IM2 table in zx rom (I=#3B ... -
Interface 1 bisOk, well the postmans just been and brought with him my new arrival, the Interface 1 bis. So as promised I thought I'd share some initial usage exper…
... about data bus stability during interrupt ? Z80CPU need stable vector value ... mouse driver use incomplete IM2 table (often only some last bytes ... to begin of original IM2 table. ZX Spectrum models in combination ... zx sofware/games with IM2 table in zx rom (I=#3B ... -
Thinking of modding an Atari paddle controller for games like Arkanoid...Hello, Was thinking of trying out a controller mod using an Atari 2600 paddle controller to use with games like arkanoid, Batty, etc... The paddle c…
... :
[code]
;Called at interrupt time (for example). Uses Kempston ... a,c
ld h,Table/256
ld l,a ... /> ; ; 0 4 8 12
Table: db 0, 1, -1, 2 ... -
Where do you stick the stack?...OK, so I've got a fair chunk of ASM code assembled from 24000 mark. The stack shouldn't get very big, just a few PUSHes and POPs of the main regis…
... as i understand. The interrupt-jump-table-gab is such too. how ... -
Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... was to allow fast interrupt response. An interrupt routine could 'save' the ... terms of speed. If your interrupt is being triggered so frequently ... the latency to servicing the interrupt is what is important, is ... is an offset into a table (C++'s vtable) or is ... -
Bug in Super Wonder Boy in Monsterland?Hello!:smile: This game seems to have a bug that prevents finalize. The dragon that is in the last level, it is impossible to kill.Remains static.No…
... some space from the interrupt vector table so do post if you ... -
z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... 1&view=markup"]translation table[/URL] that uses CAPS and ... variable LAST_K is located. The interrupt routine writes the keypresses to ... the two (or more) interrupt routines with a GenericISR on ... program, you have an IM2 table at 0xd300 (257 bytes), what ... -
z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... scheduler is run on every interrupt and one of a ... im2 service routine (im2 table filled with 0xd1 bytes)
table (257 bytes)
61 ... I placed an im2 table at 0xd000 below that and ... the gap between the im2 table and the sp1 variables. ... -
z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... crash depends on where the interrupt occurs.
... * memset() creates a 257-byte table of 0xd4 bytes at address ... instruction
Every interrupt a "JP my_isr" is executed ... to get to your interrupt routine.
... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... sp
im 1 ; interrupt mode 1
ld ... /> ldir ; copy initial channel table
ex de, hl ; ... /> ldir ; copy initial streams table
ld (iy + _df_sz ... chn_cd_lu ; HL points to lookup table
call indexer ; get ... -
SCREEN$ bug fixI've been using the SCREEN$() function recently for reading data off the screen rather than taking up space with an array and I got fed up with the s…
... coded now, but the data table update isn't working properly ... or via a hot-key interrupt, I could list out the ... I incorporated a little parameter table for CHARS, UDG and BLOCK ...
