-
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br /> inc bc ; adjust length
; ... br /> sll e ; opcode for undocumented instruction "SLS ... br /> sll e ; opcode for undocumented instruction "SLS ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... br /> sll e ; opcode for undocumented instruction "SLS E ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... defb $cb, $33 ; opcode for undocumented instruction "SLL E ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... /> call next_bit ; load length data bit
rl ... /> call next_bit ; load length flag
jr nc ... br /> sll e ; opcode for undocumented instruction "SLS ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... br /> sll e ; opcode for undocumented instruction "SLS E ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
...
inc bc ; adjust length
; determine ... defb $cb, $33 ; opcode for undocumented instruction "SLL E ...
inc bc ; adjust length
; determine ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... defb $cb, $33 ; opcode for undocumented instruction "SLL E ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... br /> sll e ; opcode for undocumented instruction "SLL E ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... br /> sll e ; opcode for undocumented instruction "SLL E ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... br /> sll e ; opcode for undocumented instruction "SLL E ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... defb $cb, $33 ; opcode for undocumented instruction "SLL E ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... br /> sll e ; opcode for undocumented instruction "SLL E ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... br /> sll e ; opcode for undocumented instruction "SLL E ... -
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…
... code 118 which is the opcode for HALT, and rather than ... it that ran in fixed length routines during the frame flyback ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... defb $cb, $33 ; opcode for undocumented instruction "SLL E ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... br />
; determine length
length_value_loop:
call ...
inc bc ; adjust length
; determine ... defb $cb, $33 ; opcode for undocumented instruction "SLL E ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... br /> ld a,0x37 ; opcode for SCF
ld (.load_error ... /> ld a,0xa7 ; opcode for AND A, clears ... /> dec de ; decrement data length
jr .main_loop ; ... -
Startup colours of the Spectrum ROMHi Folks, Thought I would have a go at changing the startup colours of the Spectrum ROMs used within BasinC which ships with 48.rom (16384 bytes) …
... 00ED);
// $ED Unused Opcode Trap for the Error Reconstruction ... For Idx := 1 To Length(Str) -1 Do Begin
Length(Str)]);
Inc(MemIdx);
Length(Str)]);
Inc(MemIdx);
The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…
... (const void *opcode, const void *instruction) {
uint8_t length=((instruction_t*)instruction)-> ... ;omask);
while (length--) {
if ((*msk) == 0x01) { /* Opcode */
if (*b1 ...Easiest way to figure instruction lengthGiven a start address, what is the easiest way to find out instruction length at that address in Z80? I found [url="http://www.z80.info/decoding.htm"…
... 1 byte in length. Hence, replacing it with original opcode should not ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... is code (LD D, L) - opcode #55
EDIT: Although ... 's where you pass the length of the string to text_out ...How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... is code (LD D, L) - opcode #55
EDIT: Although ... 's where you pass the length of the string to text_out ...Can someone please help me with the name of this game?It is set side on, with two chaps dress as knights. They are facing each other, attached by their backs to the wall with a length of elastic or rope.…
... to the wall with a length of elastic or rope. As ...Emulation and Debugging functionality[Cut n Paste from the original CSS post] Hi all, I'm currently working on SPIN's debugger, which is coming along nicely. Mostly, it's been devel…
... before or after the current opcode, which
allows any debugging ...Short Z80 QuizQ1) Which program gives different result ? A) XOR A ADD A,A B) XOR A ADC A,A C) SCF ADD A,A D) SCF ADC A,A Q2) What is the equivalent of NEG …
... is the slowest 1 byte Opcode (10 Bonuspoints if you find ...Solution for overwritten stack in 48k SNA filesIt has been known for quite some time now that the 48k SNA file format has one serious fault, which is described in the file formats section on the W…
... the way described bellow. The length of the "new" SNA file ...TZX file format descriptionI figured what this meant after a few minutes: The length of a block is given in the following format: Numbers in square brackets [] mean that the v…
... few minutes:
The length of a block is given ... rewritten without mistakes:
The length of a block is given ... other values are simply the length. Example: [02,03]+0A means ...
