-
Ensure program runs in USR 0 mode?Is there some BASIC that can be used in a program to make sure the the program runs (even on 128k models) in 48k or USR 0 mode? I obviously then wan…
Is there some BASIC that can be used in a program to make sure the the program runs (even on 128k models) in 48k or USR 0 mode? I obviously then want to be able to run the rest of the program from the USR 0 mode. -
[Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…
... is operating on all 16bit register pairs, but would it be ... system variable 'ATTR_P'.
ld bc,$2018 ; b = cell counter, 32 ... means blank it.
ld bc,$0018 ; b = byte counter, 256 ... -
Currah uSpeech ROM Paging and BootyHi, When I emulated the Currah uSpeech for [url="http://www.inkland.org.uk/inkspector"]InkSpector2[/url], I made it page in its own ROM on memory …
... /> ld de,$fffb
ld bc,$0064
ldir
ret ... bytes of ROM too, as register DE wraps around.
BasinC can accept Intel 8086 assembler inside REM-linesIn the year 1983m the firmware "ACS SOFTWARE" develope basic-spectrum with REM+assembler Finally, here are two sample routines you might like to try…
... hl
90 REM pop bc
100 REM ret
120 RANDOMIZE USR 58000[/i]
My purpose ...A couple of random questions......because, why not? (1) USR0 mode on the +3/+2A/B I know of its existence, I know how it's used, and I have some games that require it to work o…
... /+2A/+2B ROM that allowed USR to be used, effectively, as ... from the +2 manual (ld bc,99 / ret) which has the ...type in to learn about IM2I'm trying to mess around with learning about IM2 and I found a nice little article in Sinclair User September 1988, issue 78, Page 70-71 [url="https…
...
;;issue 78
;;print usr 65285
;;ff05
push AF
push BC
push DE
push ...
pop DE
pop BC
pop AF
ei ... /> ld DE, $5819
ld BC, 7
ld (HL), $57 ...Last Problem in Chapter 3 of Toni Baker's Mastering Machine Code on your ZX Spectrum.Chapter 3 of this great book is all about how to use the registers and covers the operations LD, ADD, ADC, SUB, SBC, INC, DEC, SCF and CCF. The la…
... to produce a 1 if BC is greater than DE, but ... I invoke it by PRINT USR 61440. However, I can only ... Notes
LD BC, 0 01A000 Init BC to 10
LD ... CARRY
SBC HL, BC ED42 IF BC is greater than HL ...Loading Bars - Rnd USR cmd ?Morning, Just a quick question - messing about with basic and all those years back I seem to remember a way to create loading bars with a RANDOMISE …
... loading bars with a RANDOMISE USR command with a certain value ...Loading Bars - Rnd USR cmd ?Morning, Just a quick question - messing about with basic and all those years back I seem to remember a way to create loading bars with a RANDOMISE …
... loading bars with a RANDOMISE USR command with a certain value ...Loading Bars - Rnd USR cmd ?Morning, Just a quick question - messing about with basic and all those years back I seem to remember a way to create loading bars with a RANDOMISE …
... loading bars with a RANDOMISE USR command with a certain value ...New (latest) Version of #CSpect: SpecNext Emulator for Windows, Linux and OSX by Mike DaillyNew latest Version of #CSpect: SpecNext Emulator for Windows, Linux and OSX by Mike Dailly V2.15.2 As seen on Facebook yesterday: [quote]Mike D…
... stackless NMI support
Reset register $02 added
Added NextRegs ... /write to return values in BC,HL and DE as described ...How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…
... until the bit about pc register,lol...why do you have ... 256 as well when loading bc with numbers....i can see ...How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…
... from 0-255 or paired (BC, DE, HL) to store numbers ... can see that the second register of a pair stores the ... each bit in a single register now represents a number 256 ... />
Load those figures into BC to confirm this from BASIC ...How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…
... (also known as the Accumulator) register.
HL is ... the most important 2 byte register. H is Hi-byte and ... /> LD A, 2
LD BC, 2 ; we are putting a ... number in a 2 byte register. the assembler
; automatically ...How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…
... (also known as the Accumulator) register.
HL is ... the most important 2 byte register. H is Hi-byte and ... /> LD A, 2
LD BC, 2 ; we are putting a ... number in a 2 byte register. the assembler
; automatically ...PAW questionThis may not be the right place but anyways there it goes: I've been trying to figure out how to import graphic files in .SCR format in the PAW parse…
... the screen memory
LD BC,2048*screensize ; the size of ... information at HL
LD BC,256*screensize ; the size of ... to take the value of register A, which contains the value ...ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…
... which is a commonly used register to load memory contents), ... br />
ld bc,020h
loop ldir
ld bc,020h ; rather than loop ... can use
; bc to subtract from hl before ... ; second line
ld bc,736 ; counter
ldir ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... the printer.
Unfortunately the BC-reg must be larger than ... it all.
LLIST USR START : REM SHORTEST CALL
Anyone got a copy of 'Z80 for primates'?This Z80 lark isnt easy, in fact it makes me feel very much like Washoe the chimp trying to learn learn sign language, I just dont think I've got the…
... 16 bit memory pointer
BC = 16 bit counter
B ...
IX = 16 bit index register, secondary 16 bit accumulator
IY = 16 bit index register, secondary 16 bit accumulator
Anyone got a copy of 'Z80 for primates'?This Z80 lark isnt easy, in fact it makes me feel very much like Washoe the chimp trying to learn learn sign language, I just dont think I've got the…
... 16 bit memory pointer
BC = 16 bit counter
B ...
IX = 16 bit index register, secondary 16 bit accumulator
IY = 16 bit index register, secondary 16 bit accumulator
Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
... DE,HIGHBYTE + 1
LD BC,257
LD A,VECTOR ... /> ; IM2 routine will use I register to look at table at ...Anyone for a hacking challenge ?I have to get the DSK version of Tomahawk to work. It uses the well-known Digital Integration "SECURITY CODE" lock just like in Bobsled, ATF, etc. Th…
Here's the Lenslok proggy I chose...
It's TT RACER but I'd imagine the following could be applied to all Lenslok games...
=====================
TT RACER AND LENSLOK
=====================
Ok, So the ...
