Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08405 Graphics Minor Always Aug 25, 2022, 11:40 Sep 8, 2022, 02:20
Tester einstein95 View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Linux (64-bit)
Status [?] Confirmed Driver
Version 0.246 Fixed in Version Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary 08405: t1000hx, t1000sx, t1000tx, t1000rl, t1000tl2, t1000sl2: Screen corruption when setting screen mode 0 in BASIC
Description Screen mode 0 in BASIC should enable the 80x25 character screen mode (using 8x16px characters, for a resolution of 640x400), but trying to use it in MAME instead overwrites the screen with corruption and spams the log with "[:pcvideo_t1000] t1000_gfx_1bpp_update_row"
Steps To Reproduce Boot the computer with Tandy MS-DOS
Type "screen 0" then press enter
Additional Information Before the "t1000_gfx_1bpp_update_row" log spam, the last message is "[:pcvideo_t1000:mc6845_t1000] M6845: Mode Control 02 is not supported!!!"
Github Commit
Regression Version
Affected Sets / Systems t1000hx, t1000sx, t1000tx, t1000rl, t1000tl2, t1000sl2
Attached Files
png file icon 0000.png (22,507 bytes) Aug 25, 2022, 11:40 Uploaded by einstein95
The screen with corruption
There are no relationship linked to this issue.
User avatar
Senior Tester
Aug 27, 2022, 14:51
I'm having great difficulty getting these systems to recognise anything in drive A, when choosing a software-list item. It doesn't show in the File Manager.

t1000rl tries to start some kind of desktop but hangs.

I also tried some loose software with mixed success.

Please provide the exact steps in how you got your machine to run BASIC.
User avatar
Sep 7, 2022, 07:24
edited on: Sep 7, 2022, 07:26
Try mame t1000hx -flop1 msdos33sl2. Give it a bit so it boots, it'll ask you to enter the date and time, just hit enter.

At the prompt, just type basic, hit enter, and wait a bit for it to load. GW-BASIC 3.20 will load, there you can type "screen 0" (no quotes) and you'll get the screen shown above. OR, just press F10 (with UI controls disabled) at the basic prompt, seems to enter 'screen 0,0,0"? I managed to get a glance of that before the screen corrupted.
User avatar
Senior Tester
Sep 8, 2022, 02:19
With that sequence I was able to confirm the report.

You can enter another screen command either before or after that one, and the problem is gone.