diff options
| author | Jan Tuomi <jan@jantuomi.fi> | 2024-04-12 19:01:52 +0300 |
|---|---|---|
| committer | Jan Tuomi <jan@jantuomi.fi> | 2024-04-12 19:01:52 +0300 |
| commit | d993f522cfd091d35e538a8c3f77bc233a560bf2 (patch) | |
| tree | 0cab4973e13b5972a4b1038ebf45c3910135d003 /resources/asm | |
| parent | 4f78086920cd4e2cee6d970decaee7025875f2a9 (diff) | |
Add initial TPU emu
Diffstat (limited to 'resources/asm')
| -rw-r--r-- | resources/asm/bootstrap.atk16 | 13 | ||||
| -rw-r--r-- | resources/asm/tpu.atk16 | 12 |
2 files changed, 22 insertions, 3 deletions
diff --git a/resources/asm/bootstrap.atk16 b/resources/asm/bootstrap.atk16 index 4e5cd24..9b024e6 100644 --- a/resources/asm/bootstrap.atk16 +++ b/resources/asm/bootstrap.atk16 @@ -1,3 +1,5 @@ +@let SP RH + ; vector table fields @let vector_table 0x10 @let vt_ISR0 0x10 ; ISR0 @@ -44,7 +46,8 @@ hlt @label keyboard_isr - stack_stash RA RB + spu RA + spu RB ldi vt_kb_pp_addr RA ; RA := Keyboard peripheral address pointer ldr RA RA ; RA := Keyboard peripheral address deref ldr RA RA ; RA := <16-bit keyboard character code> from MMIO register @@ -52,7 +55,8 @@ ldr RB RB ; RB := Terminal peripheral address deref str RA RB ; terminal <- character code (ASCII?) mov RA RE ; RE := character code (for debugging) - stack_restore RA RB + spo RB + spo RA rti @label program_segment @@ -66,6 +70,9 @@ @address program_segment ; set graphics mode to disabled - set_graphics_mode gr_disabled_mode + ldi vt_gr_mode_addr RA + ldr RA RA + ldi gr_disabled_mode RB + str RB RA ; jump to main (user defined) jpi main diff --git a/resources/asm/tpu.atk16 b/resources/asm/tpu.atk16 new file mode 100644 index 0000000..1278f71 --- /dev/null +++ b/resources/asm/tpu.atk16 @@ -0,0 +1,12 @@ +@include bootstrap + +@label main + ldi vt_gr_mode_addr RA + ldr RA RA + ldi gr_text_mode RB + str RB RA + +@label loop + jpi loop + + hlt |