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Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…
[QUOTE=rahtgaz;328421]LD SP seems one heck ... stack somewhere convenient, and LD SP,nnnn is the way ... .
In fact, LD SP,nnnn does come in ... than the sensible methods like LD (HL),A. But abusing SP ... br />
Now, EX (SP),HL is the instruction *I've ... -
Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…
[QUOTE=rahtgaz;328421]LD SP seems one ... /> [CODE]
LD (END+1),SP
LD SP,SOMEDATA
END: LD SP,0
RET
OR E
LD (HL),A
INC L
POP HL
LD A,(HL)
INC HL
PUSH HL
... -
Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…
... this:
[code]
LD HL,whereto
CALL 1009
or this
[code]
LD IX,whereto
CALL 1008 ... /> which in fact does CALL (HL) or CALL (IX)
start:
ld hl,14
add hl,sp
ld sp,hl
ret ... -
Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…
... ;number of trees
LD HL,16384 ;first tree position
PUSH HL
CALL DrawOneTree
... POP HL
POP BC ;restore registers
LD A, ... correctly:
PUSH HL
PUSH DE
PUSH ... -
Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…
... D
OR E
LD (HL),A
INC L
HL points to an address in ... -
Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…
... /> LD HL,PROG-HERE
ADD HL,DE
LD DE,SCREEN
LD BC ... -
New for 2009 - mc onelinersI found the limit of one line and one screen's worth of program really useful in (re-)learning BASIC, so I've decided to carry the format over into m…
... /> add hl,de
ld (hl),a
inc hl
ld (hl),a
ld de ... ,21
add hl ... /> ld hl,23278 ;initialise car
ld a,8
ld (hl),a
ld (32900),hl ... -
[BASin] Bug report and question[B]1. Bug report:[/B] BASIC Editor behavior I'm using a variable to store the contents of the BC register. But the BASIC editor works strangely. I t…
... any expression in the assembler - LD HL, $ is valid syntax. It evaluates ... -
Thinking in Assembly (first efforts)The following is one small routine to educate myself on a few concepts (jumps, flow control, routines, CPI): [code]searchmem xor a …
... search the entire memory
ld hl, 0 ; start searching at address ... br /> search: cpi ; a-(HL)
jr z, found
found: dec hl ; get found address
... /> use
LD A,B
OR C ... -
Thinking in Assembly (first efforts)The following is one small routine to educate myself on a few concepts (jumps, flow control, routines, CPI): [code]searchmem xor a …
... ; search the entire memory
ld hl, 0 ; start searching at address ... : cpi ; a-(HL)
jr z, found
ld a, b
found: dec hl ; get found address
push ...
