C
Chris Mattern
David said:
Hey, DCB=(LRECL=80,BLKSIZE=0,DSORG=PS,RECFM=FB) should be
intuitive for anybody!
Chris Mattern
Hey, DCB=(LRECL=80,BLKSIZE=0,DSORG=PS,RECFM=FB) should be
intuitive for anybody!
Chris Mattern
L
Leythos
How about a step even further back:
Move.B #0,Dx Clr.B Dx 8 cycles, 2 bytes
Move.W #0,Dx Clr.W Dx 8 cycles, 2 bytes
Clr.L Dx Moveq #0,Dx 2 cycles
Move.L #0,Dx Moveq #0,Dx 8 cycles, 4 bytes
Move.L #0,Ax Suba.L Ax,Ax 4 cycles, 4 bytes
Move.L #[-128..127],Dx Moveq #[-128..127],Dx 8 cycles, 4 bytes
Or things like this:
begin: push hl ;Save
call clear
ld hl,0 ;Get top of memory
ld b,0 ;HIGH$
ldos @high$
dec hl
push hl
ld de,buffer ;Start of buffer
D
David W. Hodgins
My memory is failing<g>. Is that 780?
W
Walter Roberson
:> Move.B #0,Dx Clr.B Dx 8 cycles, 2 bytes
:> Move.W #0,Dx Clr.W Dx 8 cycles, 2 bytes
:> Clr.L Dx Moveq #0,Dx 2 cycles
:> Move.L #0,Dx Moveq #0,Dx 8 cycles, 4 bytes
:> Move.L #0,Ax Suba.L Ax,Ax 4 cycles, 4 bytes
:> Move.L #[-128..127],Dx Moveq #[-128..127],Dx 8 cycles, 4 bytes
:> begin: push hl ;Save
:> call clear
:> ld hl,0 ;Get top of memory
:> ld b,0 ;HIGH$
:> ldos @high$
:> dec hl
:> push hl
:> ld de,buffer ;Start of buffer
:My memory is failing<g>. Is that 780?
The first one looks to be 680x0, with each 'x' being a number -- data
registers for the Dx, address registers for the Ax. When I first read it,
it appeared to be somewhere around PDP11, but PDP11 did not have
Moveq (Move Quick), did not have Suba (Subtract Address), and
did not have Byte (.B), Word (.W) -and- Long (.L) extensions.
The second would be something in the *80* series, like Z80 or 8080 or
80x86. The 'de' registered had appeared by the time of the 8086, but
I wouldn't swear it existed at the time of the 8080. I'm going to
guess Z80.
:> Move.W #0,Dx Clr.W Dx 8 cycles, 2 bytes
:> Clr.L Dx Moveq #0,Dx 2 cycles
:> Move.L #0,Dx Moveq #0,Dx 8 cycles, 4 bytes
:> Move.L #0,Ax Suba.L Ax,Ax 4 cycles, 4 bytes
:> Move.L #[-128..127],Dx Moveq #[-128..127],Dx 8 cycles, 4 bytes
:> begin: push hl ;Save
:> call clear
:> ld hl,0 ;Get top of memory
:> ld b,0 ;HIGH$
:> ldos @high$
:> dec hl
:> push hl
:> ld de,buffer ;Start of buffer
:My memory is failing<g>. Is that 780?
The first one looks to be 680x0, with each 'x' being a number -- data
registers for the Dx, address registers for the Ax. When I first read it,
it appeared to be somewhere around PDP11, but PDP11 did not have
Moveq (Move Quick), did not have Suba (Subtract Address), and
did not have Byte (.B), Word (.W) -and- Long (.L) extensions.
The second would be something in the *80* series, like Z80 or 8080 or
80x86. The 'de' registered had appeared by the time of the 8086, but
I wouldn't swear it existed at the time of the 8080. I'm going to
guess Z80.
L
Leythos
[email protected] said:
Exactly correct - the 68000 series.
Z80 is also correct.
Sheesh, I had to pull up old paper print-outs to find this, none of my
large format diskettes fit in my 5.25" floppy
T
Tore Lund
Leythos said:
Since we are already off topic, maybe you could divulge what LDOS is?
A macro or something? I cannot see it in my Z80 reference.
C
cquirke
Ah, that brings a tear to my eye
Cue geek joke...
"What's the opcode for "PUSH BC" ?
' I dunno... what? '
"C5!"
<everyone ROTFL>
Push BC is a Z80 asembler mnemonic that codes to hexadecimal C5.
Why this is funny is because Clive Sinclair (originator of the Black
Watch, ZX80, ZX81, ZX Spectrum and QL computers) also invented the C5,
a lightweight personal transport that took off like a Ford Edsel
without an engine. Push BC can also be read as "Push Bicycle"...
....I guess you had to have been there
We used to do horrible things like...
LD A,I
LD (IXH), A
LD (IXL), C
PUSH IX
RET
Sucess-proof your business! Tip #37
When given an NDA to sign, post it on your web site
L
Leythos
It's a key for the specific compiler I use to use. It has nothing to do
with the instruction set. I can't remember what it does - links to the
first DOS segment (not MS DOS).