Which MSX1 has which VDP exactly?

صفحة 5/8
1 | 2 | 3 | 4 | | 6 | 7 | 8

بواسطة l_oliveira

Hero (534)

صورة l_oliveira

25-07-2014, 17:24

Fabf wrote:

TMS9118 has also clock out (like V99X8) so you can save more monney with this one

So does TMS9128 and TMS9129. Also they use only two VRAM chips (4-bit chips) instead of eight. Even though they still require the video encoding board they already save a lot of money on design. That's why there's more MSX computers using TMS912x than TMS992x.

بواسطة ARTRAG

Enlighted (6846)

صورة ARTRAG

25-07-2014, 20:41

Thanks for testing. The reason why ony the main sprite has problems is that it is the sole sprite that is updated on fly on isr.
The glitch occurs only on msx 1 ntsc systems becouse in pal that update falls during vblank.
In ntsc systems insted the border tracing is shorther so that sprite update falls in active area.
On msx 2 i/o timings are less strict so nstc or pal does not matter.

بواسطة sd_snatcher

Prophet (3512)

صورة sd_snatcher

02-08-2014, 18:24

Some more machines to the list, thanks to Werner:

- Toshiba HX-51i: T7937 (A?)
- Al Alamiah AX-170mk2: T7937
- Sanyo MPC-1: T6950

بواسطة sd_snatcher

Prophet (3512)

صورة sd_snatcher

02-08-2014, 21:50

More machines thanks to Wernerkai:

- Samsung Fenner SPC-800: VDP=TMS9929, because it has 4116 chips for VRAM, and the daughterboard has a LVA510 chip. PSG=AY-3-8910, CPU=GSS Z8400APS

- Casio PV-7: VDP=TMS9118, PSG=AY-3-8910, CPU=uPD780C-1

- Toshiba HX-22i: TMS9929, PSG:AY-3-8910, TV-Encoder: LVA510, CPU=LH0080A

- Casio MX-10: VDP=TMS9118, PSG=AY-3-8910, CPU=uPD780C-1

Edit: Fixed a typo. The SPC-800's VDP is 50Hz.

بواسطة l_oliveira

Hero (534)

صورة l_oliveira

02-08-2014, 21:41

As far as I know, LVA510 is a PAL-Only video encoder so the Fenner must have a TMS9929 as VDP. While the 10 mhz crystal connected to the VDP is the right one for NTSC, the boards with LVA510 always have a built in crystal in them, which is notable in the pictures taken by Werner. If the Fenner is indeed NTSC, I would be interested on more information regarding the encoder board.

GSS = Goldstar

I happen to have a newer Goldstar Z80 chip. An Z8400BPS (Z80B). I tested it with the CPU test program and it detected as standard Z80 so I'd bet same happens with the Z8400APS chip.

Besides the "fugly" repair on the cassette port remote relay, the SPC-800 MSX looks perfect.

بواسطة sd_snatcher

Prophet (3512)

صورة sd_snatcher

02-08-2014, 21:51

@l_oliveira

Thanks for the warning, it was a typo. The machine is 50Hz.

بواسطة sd_snatcher

Prophet (3512)

صورة sd_snatcher

03-08-2014, 20:03

Credit to Wernerkai, again:

- Sanyo MPC-2: VDP=T6950, PSG=AY-3-8910, MSX-Engine=T7775

بواسطة Manuel

Ascended (18864)

صورة Manuel

11-10-2014, 15:40

Does someone have more info about this topic? So, any other machines of which you know the exact VDP type?

بواسطة ARTRAG

Enlighted (6846)

صورة ARTRAG

11-10-2014, 15:57

Dioniso is working to an interesting test program potentially able to auto detect the difference between TMS and Toshiba chips and tell if your machine has a clone vdp or not.
The test is still in early stage of development and needs testing but looks promising.

بواسطة Manuel

Ascended (18864)

صورة Manuel

11-10-2014, 19:51

Sounds interesting. It won't be able to detect the difference between everything, but it helps a lot (no need to open up machines or have the service manuals for some VDP's).

صفحة 5/8
1 | 2 | 3 | 4 | | 6 | 7 | 8