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A Neat Redefine Keys RoutinePreviously, I’ve only shared this routine with a couple of people via PM, but I’ve now decided to make it public. I optimized it for size, so it uses…
... is zero; otherwise, use a 16-bit register
;pair, such ... +1) ;? down (vertical coordinate)
rst $10
ld a,22 ... (437500 / f - 30.125) 8372.16
ld de,17 ;duration ... f*t (8372.16 * .002)
push ix ;preserve ... -
What Spectrum games compare favourably with the 16 bit versions?Obviously Out Run is not one of them ;) But I'm interested in the late 80s period again when a lot of Spectrum games were sadly afterthought cash-…
... played well compared with their 16-bit equivalents? -
Sinclair User issue 127: Great Eight 16 - what happened?I've been trying to make sure I have an as-near-to-complete-as-possible collection of Crash, Sinclair User and Your Sinclair covertapes (at least as …
... SU issue 127: Great Eight 16, which is available - in a ... -
NMI Routine and Restarts in a new 128K ROMI'm presently engaged in creating AGD 5 with the intention of making it a pair of 16K ROMs for the 128K/+2. I'm fairly sure that the vast majority o…
... my use of the RST slots, especially RST 8. I know there ... 'm open to suggestions. RST 0, 16 and 56 are taken but ... rest are up for grabs. RST 8 wasn't supported in ... as the delay routine in RST 0 overran. Beyond that if ... -
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... JR Z,PLOT
;REPORTBc RST 08H ; ERROR-1
; ... ,15,15
.db 16,16,16,16,16,16,16,16
.db 17,17, ... /> .db 128,64,32,16,8,4,2,1
16,8,4,2,1
16,8,4,2,1
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 …
...
LD A,(HL)
RST #10
LD A,(HL ...
LD A,(HL)
RST #10
INC B
16:04 ]Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…
... this is a single-byte RST instruction that performs a subroutine ... the Z80 will execute a 'RST 0x38' which is a subroutine ... 'I' register to form a 16-bit address (the 'I' register ... 8-bits of the resulting 16-bit address). The two bytes ...i want to start writing my own gamesi want to start writing my own games but have no idea how. is there any downloadable dummys guides or some software that teaches u how. the only expe…
... ]
On 2004-02-03 16:33, GBNvK wrote:
Yup ... .
(Actually it would RST 38 twice then return but ... : cyborg on 2004-02-03 16:43 ]RST 16 with TASMCan any body tell me what is wong when I assemble this test code with TASM : ;print a long string "help me" start .org 32000 ld a,2 call 5633…
I think you probably want RST 10 - 10 being the hex for 16.InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... the processor simply executes an RST 38 instruction if an interrupt ... is then treated as a 16 bit word (LSB of ... 0xff), coincidentally the opcode for RST 38, so the Z80 will ... ; if there is a RST n on the data bus ... so it 7 for an RST instruction and the total ...Competition: Sadistick routine on Spectrum ROMMy vote goes to BEEPER at #03B5 Let's ear you pick! :) And a great BOHHHHHHHHHHHHH to Dr Ian Logan & Dr Frank O'Hara for their description about the…
... .
[/quote]
Hint: RST 28
[/quote]
16;4)
DE
16;4)
Note #1 ...Bug in EMUZWINIt's quite minor actually and is in the Assembler. Ocassionally when assembling the ASM gives the wrong address to a label. For instance I used the l…
Version 2.7 build 1.8 (small fix in asm for RST n, now it s compiled like directive, allowing argument 0..7 or 0,8,16,...56 in any numeric base or as an expression).After roughly 22 years can you help?Hi, A long one this but here goes. Roughly 22 years ago (i was 14 if i remember right) i got a 48K speccy for christmas of my dad it was awesome an…
... /> [code]
LD A,#16
RST #10
LD A,5 ... ; COLUMN 5
RST #10
LD A,8 ... ; ROW 8
RST #10
LD A,"A ... "
RST #10 ; PRINT "A" AT COLUMN ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... typically be a single-byte "RST n" instruction that effectively causes ... ) to form a 16-bit address. A 16-bit subroutine address is ... " bytes so we specify the 16-bit "0xd4d4".
... continued ...Calling ROM routinesFirstly, sorry if this is the wrong forum to post this in, but I wasn?t quite sure under which heading is best fitted. I?m trying to figure out how…
... expected numbers - 1, 4, 9, 16, 25, 36, 49, 64, 81 ... /> CALL $2D28 ; STACK-A
RST 28H ; enter calculator
DEFB ...Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…
... (s) here
defw === put 16-bit word(s) here
push hl
rst #10
pop hl
Galaksija emulator for ZX Spectrum +3/+2A(black)This is a NEW program/utility/game pack for ZX Spectrum. It is basically an emulator of an ex-Yugoslav computer "Galaksija" which is also Z80 based. …
... =Dr BEEP;175321]It uses 16 bytes for every command possible ... , I thought you were using RST patches on special cases, with ...Galaksija emulator for ZX Spectrum +3/+2A(black)This is a NEW program/utility/game pack for ZX Spectrum. It is basically an emulator of an ex-Yugoslav computer "Galaksija" which is also Z80 based. …
... , I thought you were using RST patches on special cases, with ... . If I would patch with RST I must use an Eprom ... save the CALL-address. When 16 bytes isn't enough I ...Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …
... PRINT functionality from the ROM (RST, channels, etc.) as well as ... simply by (say) loading a 16 bit register with an address ...Disassemblers and RSTsI think this is a longshot, but... is anybody aware of a disassembler that handles the Interface One RSTs? e.g. RST $10 DEFW $0020. Cheers
... br /> org $f900
rst $08 ; f900 cf $0bts
l_f909: rst $10 ; f909 d7 $0bts< ... /> defw $1601 ; f928 01 16 ts
call $10a5 ; ... cb 3f $08ts
rst $10 ; f99a d7 $0bts ... ; fa1c 46 $07ts
rst $10 ; fa1d d7 $0bts
question about RST 10hhow do you set the position of the text when using 'RST 10h' to print to screen?
... beginning of next line)
16 - INK Control
17 - ... INK or PAPER CONTROL
RST $10
LD A, ... INK or PAPER COLOUR
RST $10
To ...
LD A, CONTROL
RST $10
LD A,n ... 1 = ON 0 = OFF
RST $10
...Dangerous Z80 Assembly CommandHave been reading Toni Bakers' "Mastering MC On Ya Speccy" book and came across the list of Z80 commands in the dictionary section. Page 102 "[b]IM…
... and it will drive all 16 channels of a MIDI instrument ... at the end of the RST 38 routine).
The ...Interface 1 emulation issuesFor Virtual Spectrum v3.0 I am implementing virtual Interface 1 and Interface 2 options! The I/F2 ROM option works already, and I have got the I/F1 s…
...
ld (hd_11),de
rst $08
defb $32
returns a "realtime" CRC-16|CCITT checksum value of 42860 ...Handling RST8 on a +3Well, I've come to that bit of my project that I wasn't really looking forward to (because I don't understand enough about the ZX BASIC ROM) - extend…
... from a string to a 16 bit int)
* ... at any time (because RST 8 traps bring along other ... used with devices that use RST 8 , because only one ... device can own RST 8 ). The ROM can ... any ROM trapping, the RST 8 trap infrastructure still needs ...Need to read code start and length from a +3 diskso i can transfer them to my internal ZXMMC interface and my mind has died as to how to do it (i know how to for a tape) any help or a general kick i…
... 40019
1000 DATA 24,16,0,0,0,0,0 ... /> jr begin
fname: defs 16 ;Filename
begin: inc ... /> ;
; TODO: Handle errors with RST 8 rather than returning them ...+3 Centronics port: How does it work?I've been trying to follow the code with Fuse's debugger and I can't see it writing anywhere except to port 0x1ffd. It also jumps through some fairly…
... bc,0x01ffd ;
ld a,16 ; set bit 4 when BASIC ... if not pressed
rst 08h ; error L
defb ...Interface One - New FunctionalityAs you may (or may not) be aware the Interface One is a pretty powerful piece of kit. One of it's greatest features is being able to easily extended …
... BC (or error if>16 bits)
stackbc equ 2D2Bh ...
