Recent posts

#1

Programming / Re: Rasm Z80 assembler

Last post by roudoudou - Today at 11:46

#2

Programming / Re: Rasm Z80 assembler

Last post by HAL6128 - Today at 10:40

Damn, yes, you're right. I'm using embedded libraries for the macros, and I changed the wrong one without noticing it. Stupid, stupid...
So... the macro in this way makes no sense because A as a second parameter will be overwritten by previous actions...

#3

Programming / Re: Rasm Z80 assembler

Last post by roudoudou - Today at 10:23

Thanks for the fast response!
...oh, was not my intention to point to this name conflict which I wasn't aware. It was just an example (the macro name is not my question ) ...
Let me change it to:

Code Select Expand


MACRO Write2Register register , data
LD A,{register}
LD BC,#FF64 ; port for register select
OUT (C),A
LD A,{data}
LD BC,#FF63 ; port for data transfer
OUT (C),A
MEND
LD A,#88
Write2Register #10,A
My question was regarding the "LD A,B" conversion of the macro statement "LD A,{data}", if this is a normal procedure to use register B for the second parameter {data}? Am I correct with this assumption?

HAL6128

i cannot reproduce the issue, the outputed opcode is #7F

Code Select Expand

roudoudou@praline:~/code/rasm$ ./rasm.exe ldmac.asm -map
Pre-processing [ldmac.asm]
Assembling
Bnk|Real|Logic  Bytecode  [Time] Assembly
-----------------------------------------
            | SYNCHRO EQU 256
            | IX EQU 0
            | IY EQU 0
            | RASM_VERSION EQU 2.2
      MACRO WRITE2REGISTER,REGISTER,DATA
000|0000    | 3E 00      [02]    LD A,#88                      (L9:ldmac.asm)
; Macro WRITE2REGISTER expansion with 2 parameters
000|0002    | 3E 00      [02]    LD A,#10                      (L10:ldmac.asm)
000|0004    | 01 00 00    [03]    LD BC,#FF64                    (L10:ldmac.asm)
000|0007    | ED 79      [04]    OUT (C),A                      (L10:ldmac.asm)
000|0009    | 7F          [01]    LD A,A                        (L10:ldmac.asm)
000|000A    | 01 00 00    [03]    LD BC,#FF63                    (L10:ldmac.asm)
000|000D    | ED 79      [04]    OUT (C),A                      (L10:ldmac.asm)
Write binary file rasmoutput.bin (15 bytes)



#4

Amstrad CPC hardware / Re: Designing and building the...

Last post by McArti0 - Today at 10:06

I am going to use an ATF16V8 with known-working configuration for RAM banking, i.e. copy this aspect of the CPC6128's design.

But PAL produces CAS0, CAS1 signals for two parts of RAM. If you want to read 16bit from two banks, the CAS0,1 signals must be modified.

#5

Programming / Re: Rasm Z80 assembler

Last post by HAL6128 - Today at 09:52

Thanks for the fast response!
...oh, was not my intention to point to this name conflict which I wasn't aware. It was just an example (the macro name is not my question ) ...
Let me change it to:

Code Select Expand


MACRO Write2Register register , data
LD A,{register}
LD BC,#FF64 ; port for register select
OUT (C),A
LD A,{data}
LD BC,#FF63 ; port for data transfer
OUT (C),A
MEND
LD A,#88
Write2Register #10,A
My question was regarding the "LD A,B" conversion of the macro statement "LD A,{data}", if this is a normal procedure to use register B for the second parameter {data}? Am I correct with this assumption?

HAL6128

#6

Off topic / Re: One for my UK friends

Last post by Gryzor - Today at 09:39

What is this Wikipedia thing, I get all my info from Encarta.

#7

Off topic / Re: One for my UK friends

Last post by Bryce - Today at 09:06

Maybe I should get some more sleep, I don't understand your comment...

https://en.wikipedia.org/wiki/Thread_(yarn)

Bryce.

#8

Programming / Re: Rasm Z80 assembler

Last post by roudoudou - Today at 09:00

Hi @roudoudou,
just another understanding question regarding macros in RASM:

I have defined a macro like this:

Code Select Expand

MACRO Write register , data
LD A,{register}
LD BC,#FFxx ; port for register select
OUT (C),A
LD A,{data}
LD BC,#FFxx ; port for data transfer
OUT (C),A
mend

; "calling" the macro

LD A,#88
Write #10,A
shows following code after assembling:

Code Select Expand

LD A,#88
LD A,#10
LD BC,#FFxx
OUT (C),A
LD A,B    ; <<<?
LD BC,#FFxx
OUT (C),A
why does the assembler choose LD A,B? (Register B) for the {data} value? Is this the way RASM works within macros?

Thank you in advance.
HAL6128

hi! i'm surprised there is an ouput of this macro as 'write' is a reserved keyword (for Winape compatibility) and is barely ignored

i tested it with -map option and there is no surprise, Write output nothing

will add some check for the macro name and warn about that conflict

#9

Programming / Re: Rasm Z80 assembler

Last post by HAL6128 - Today at 08:43

Hi @roudoudou,
just another understanding question regarding macros in RASM:

I have defined a macro like this:

Code Select Expand

MACRO Write register , data
LD A,{register}
LD BC,#FFxx ; port for register select
OUT (C),A
LD A,{data}
LD BC,#FFxx ; port for data transfer
OUT (C),A
mend

; "calling" the macro

LD A,#88
Write #10,A
shows following code after assembling:

Code Select Expand

LD A,#88
LD A,#10
LD BC,#FFxx
OUT (C),A
LD A,B    ; <<<?
LD BC,#FFxx
OUT (C),A
why does the assembler choose LD A,B? (Register B) for the {data} value? Is this the way RASM works within macros?

Thank you in advance.
HAL6128

#10

Off topic / Re: One for my UK friends

Last post by Gryzor - Today at 08:26

Maybe I should get some more sleep, I don't understand your comment...