TRDOS 6.11P

[VELESOFT]

Each trdos rom must be compatible also with original 128kB machines (with ZX128 or Pentagon 128 and other clones using only paging port #7FFD).

TR-DOS 6.11p set as first port 7FFD and as second write value to port 1FFD. This is incorrect way !!! As first must be always set port #1FFD and as second set port #7FFD.

This trdos version can't be used on real betadisc interface connected to ZX Spectrum 128 / +2 or Pentagon 128 / 256 / 512. All this machines use ports adressation identical with original ZX128:
Adressation of port #7FFD: A15=0 + A1=0 (0xxxxxxx xxxxxx0x). Example - OUT #1FFD,0 write on this machines value 0 to paging port #7FFD = connect page 0 + vram 0 + 128 rom (set 128rom = disconnect trdos rom). Each value writed to port #1FFD in trdos rom must contain D4=1 (set 48rom) if trdos is used on 128kB computers and OUT #7FFD must be used after OUT #1FFD !!!. This code will full compatible with all ZX models and can work on PHOENIX computer.

UNREAL SPECCY emulator use unreal ports adressation for all ZX clones/models Unreal speccy port adressation of port #7FFD: A15=0, A2=1 ( ), A1=0.

Real computer Pentagon 128/256/512kB use adressation: A15=0 + A1=0.
Real Pentagon 1024SL 2.2 and 2.666LE use adress. : A15=0 + A14=1 + A1=0
UNREAL SPECCY use abnormal ports adressation and software work incorrect.

[Advertiser]

[alsp]

TR-DOS 6.11p set as first port 7FFD and as second write value to port 1FFD. This is incorrect way !!! As first must be always set port #1FFD and as second set port #7FFD.

Thanks for information!

[VELESOFT]

Thanks for information!

And this bug can be also fixed:

http://zx.pk.ru/showthread.php?t=12301

All this TRDOS ROMS contain patch for refresh value of register HL' after use trdos command RETURN. This patched roms return correct to basic after "break LIST command + use RETURN" ). Also will work return from machine code with modified HL' register.

PATCH IN TR-DOS ROMS:

ORG #1D13
JP PATCH

ORG #332C ;(adress can be different in other trdos versions)
PATCH EXX
LD HL,#2758
EXX
JR NZ,END
DEC HL
LD (#5C3D),HL
END RET

[SoftFelix]

And this bug can be also fixed:

http://zx.pk.ru/showthread.php?t=12301

All this TRDOS ROMS contain patch for refresh value of register HL' after use trdos command RETURN. This patched roms return correct to basic after "break LIST command + use RETURN" ). Also will work return from machine code with modified HL' register.

PATCH IN TR-DOS ROMS:

ORG #1D13
JP PATCH

ORG #332C ;(adress can be different in other trdos versions)
PATCH EXX
LD HL,#2758
EXX
JR NZ,END
DEC HL
LD (#5C3D),HL
END RET

Спасибо! Именно этот код для патча и искал. А то ужЕ в подсознании сидит: уж если LIST запустил - то никаких BREAK'ов, только чтоб до конца отработал!

p.s. Willem Prog + W27C512 - черезвычайно удобная штука для Спекка!