Upgrade MSX2 to MSX2+ (Yamaha YIS-503III) КУВТ2

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By zeilemaker54

Champion (279)

zeilemaker54의 아바타

19-02-2015, 23:12

I think I can help you. I generate an Russin msx2+ rom for you. Begin of next week In will send you one. Does it have an F4 register?

By DJs3000

Expert (104)

DJs3000의 아바타

19-02-2015, 23:20

zeilemaker54 wrote:

I think I can help you. I generate an Russin msx2+ rom for you. Begin of next week In will send you one. Does it have an F4 register?

I will be very grateful for the help Smile
Port F4 will be in March. When I get ready to PCB.

By switch

Rookie (27)

switch의 아바타

20-02-2015, 10:19

Why would you do that? Do you want one? oO

By switch

Rookie (27)

switch의 아바타

20-02-2015, 10:20

Or a turbo R?

By DJs3000

Expert (104)

DJs3000의 아바타

20-02-2015, 11:08

switch, I do not understand Smile

By switch

Rookie (27)

switch의 아바타

20-02-2015, 13:43

Meaning exchanging.

By zeilemaker54

Champion (279)

zeilemaker54의 아바타

20-02-2015, 18:42

I am not an Electronic expert, but does it mean that bit 7 is 1 at cold startup?

By mars2000you

Enlighted (5677)

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20-02-2015, 19:06

For people interested by Russian MSX2+ or even turboR machines, I've added recently generic boosted machines on the Resource page of the blueMSX website.

By Jipe

Paragon (1391)

Jipe의 아바타

20-02-2015, 19:13

to MSX Assembly Page
MSX I/O ports overview
This register is basically a simple memory cell which is preserved after a reset. It is used on the MSX2+ to differentiate between a hard boot (power on) and a soft boot (reset button) by writing a value to it during the boot routine, and check for that value everytime the computer starts. On the turboR, it also indicates whether the Z80 or the R800 has to boot.
Port range Description
#F4 System flags, preserved after reset
bit 5: CPU boot mode (1=R800)
bit 7: Boot method (1=soft boot, doesn’t show start logo)

By DJs3000

Expert (104)

DJs3000의 아바타

20-02-2015, 21:59

mars2000you wrote:

For people interested by Russian MSX2+ or even turboR machines, I've added recently generic boosted machines on the Resource page of the blueMSX website.

Where i can download ROM Russian MSX2+?

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