-
Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…
... cutoff effect where you get half samples, half carry. If you wanted it ... for a duration of a half second sample ( or maybe less ... -
Z80 coders compoIf you're interested in Z80 coders compo, visit my page [url="http://mbr.nm.ru/compo.html"]http://mbr.nm.ru/compo.html[/url]
... work:
(Edit: correct half carry errors)
; enter:
or a ; clear half-carry flag
daa
ld ... -
I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... an operation results in a half-carry (i.e. a borrow from ... -
I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... .
As for the half-carry, a straightforward method would be ... ; 15) >= 16 then rem half-carry is set
If ... -BASIC-programmer descendant PerlSpectrum implement half-carry by doing something clever with ... -
ADCI'm a little confused about how the Z80 manages the ADC instruction. I'm assuming two ADD instructions are performed (am I wrong?!) I can think of 3 …
...
This sets Carry and Half-Carry flags fine but how is ... what part does the initial Carry play? Is it added to ... -
ADCI'm a little confused about how the Z80 manages the ADC instruction. I'm assuming two ADD instructions are performed (am I wrong?!) I can think of 3 …
... /> +00000001 (Operand)
+00000001 (Carry)
--------
100000001
... [quote]
This sets Carry and Half-Carry flags fine but how is ... do the same for half carry. If you're adding ... two numbers and get a carry, indicating overflow, then ... -
ADCI'm a little confused about how the Z80 manages the ADC instruction. I'm assuming two ADD instructions are performed (am I wrong?!) I can think of 3 …
... of A, operand and carry. Couple of things I ... />
Casting Operand+Carry to a word didn't ... 10000, which meant the half carry was not detected. Flag ... and $0F)+(Op and $0F)+Carry>$0F;
The Carry flag is ignored when comparing ... -
My emulator has a CPU bug, any ideas?.Hi all, I am writing a Speccy emulator in PureBASIC but have an odd bug. The spectrum interprets the odd numbers incorrectly whenever they are typed…
... .
It was a half carry flag error with the SUB ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... 1 in case of subtraction)? Carry, half carry and overflow flags during subtraction ... I'm particularly interested in half carry flag while subtracting. Some documents ... make a distinction between a "carry TO bit 4" in ... never causes either a carry or a half carry. -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... latter resets H flag (no carry from bit 3 to 4 ... - the latter sets H flag (carry from bit 3 to 4 ... never causes either a carry or a half carry.[/QUOTE]
No. Subtracting ... from 0 always sets carry and half-carry. (Edit: apart from when ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... 1 + 1 + 1 (carry) -> carry from bit 1 to 2 ... : 0 + 0 + 1 (carry) -> no carry from bit 2 to ... : 0 + 1 + 1 (carry) -> carry from bit 2 to bit ... 1 + 0 + 1 (carry) -> carry from bit 3 to bit ... 0 always caused both carry and half carry (except for the case ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... and SBC.
The Half Carry flag is for BCD operations ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... , 1 in case of subtraction)? Carry, half carry and overflow flags during subtraction ... large number will not cause carry to be set, even though ... true to say that the carry and half-carry flags on a subtraction ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... number will not cause carry to be set, even ... to say that the carry and half-carry flags on a subtraction ... have no more doubts about carry flag - subtraction triggers it ... bits at position 3 + carry from previous bits (either 0 ... 1, we got a carry from bit 3 to ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... have one last doubt about half carry/borrow, only in case of ... FFF and 1. This time half carry occurs when we have a ... carry from bit 11 to bit ... two numbers gives us a carry, BUT Sean Young's document ... F + 0 = F and no carry from bit 11 to 12 ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... have one last doubt about half carry/borrow, only in case of ... FFF and 1. This time half carry occurs when we have a ... carry from bit 11 to bit ... two numbers gives us a carry, BUT Sean Young's document ... F + 0 = F and no carry from bit 11 to 12 ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... of bits at position 3 + carry from previous bits (either 0 ... than 1, we got a carry from bit 3 to bit ... figured this out but the half-carry flag is there to support ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... BCD, which would result in half carry
(H=1) and, at ... -
Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
... x86? If there is a half carry flag and some instruction to ... -
Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
You don't need the half carry...
Using BCD, the ... original number
clear carry
foreach word of ... /> ; but does an internal carry
load word
... add (with carry) word,word
store word ... -
Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
I think the half carry is used by the DAA ... correct value in A and carry flag after adding 2 BCD ... if anything else affects the half carry flag. -
Spectrum screen layoutSeeing the thread on displacement I was wondering why the spectrum had the stupid screen split into three sections and the addresses for each section…
... contended RAM and an upper half containing optional 32K of uncontended ... would have allowed testing of half-carry to determine whether the end ... -
Calculate if two segments cross in assemblerHello, Im developing a little game and I need something that I cant archieve. I have two lines (segment of a line). Line one: X11=coord X of …
... so I could check the half-carry flag. I eventually came up ... better way to calculate the half carry. Chances are you are using ... -
You live you learn - random ramblingsWell I've been around for some time now and I continue to be amazed at the new things I find on WoS. For example, today I came across Martijn's inte…
... from them.
I half believe that most authors gave ... 's close enuff! :)
Carry on WoS! -
ZX Adveture Club thingy - game for first half of OctoberHello, Put down your rucksacks, lay down that torch, stop cussing the swamp and the ogres, our time playing [I]Monster[/I] has ended. How did you a…
... , the game for the first half of this month is going ... -
ZX Adventure Club - choose game for second-half of OctoberHello, I'd like suggestions for the game for the second-half of October which, given the lukewarm reception [I]Crack City[/I] has had, well'll start…
... the game for the second-half of October which, given the ...
